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Data Replication Service
Data Replication Service
- What's New
- Product Bulletin
-
Service Overview
- Infographics
- What Is DRS?
- Supported Databases
- Advantages
- Functions and Features
- Specification Description
- Product Architecture and Function Principles
-
Mapping Data Types
- MySQL->PostgreSQL
- MySQL->GaussDB
- MySQL->Oracle
- MySQL->CSS/ES
- Oracle->MySQL
- Oracle->TaurusDB
- Oracle->GaussDB
- Oracle->DDM
- Oracle->GaussDB(DWS)
- Oracle->PostgreSQL
- TaurusDB->Oracle
- TaurusDB->CSS/ES
- GaussDB->MySQL
- GaussDB->GaussDB(DWS)
- GaussDB->Oracle
- DB2 for LUW->GaussDB
- DB2 for LUW->GaussDB(DWS)
- PostgreSQL->GaussDB
- PostgreSQL->GaussDB(DWS)
- TiDB->TaurusDB
- Microsoft SQL Server->GaussDB(DWS)
- Microsoft SQL Server->GaussDB
- Microsoft SQL Server->MySQL
- Microsoft SQL Server->TaurusDB
- Microsoft SQL Server->PostgreSQL
- Security
- Permissions Management
- Agency Management
- Agency Management (New)
- Constraints
- Accessing DRS
- Related Services
- Basic Concepts
- Billing
- Getting Started
-
User Guide
-
Preparations
- Overview
- Registering a Huawei ID and Enabling Huawei Cloud Services
- Permissions Management
- From On-premises Databases to Huawei Cloud
- From Other Cloud Databases to Huawei Cloud
- From Huawei Cloud to Huawei Cloud
- From ECS-Hosted Databases on Huawei Cloud to Huawei Cloud
- Getting Started with Common Practices
-
Real-Time Migration
- Migration Overview
- To the Cloud
- Out of the Cloud
-
Task Management
- Creating a Migration Task
- Querying the Migration Progress
- Viewing Migration Logs
- Data Comparison (Comparing Migration Items)
- Managing Objects
-
Task Life Cycle
- Viewing Task Details
- Modifying Task Information
- Modifying Connection Information
- Modifying the Flow Control Mode
- Editing a Migration Task
- Resuming a Migration Task
- Disabling Read-Only of the Destination Database
- Resetting a Migration Task
- Pausing a Migration Task
- Cloning a Migration Task
- Stopping a Migration Task
- Deleting a Migration Task
- Importing Tasks in Batches
- Upgrading the Version of a DRS Task
- Task Statuses
- Tag Management
- Connection Diagnosis
- Interconnecting with CTS
- Interconnecting with Cloud Eye
- Interconnecting with LTS
- Appendix
- Backup Migration
-
Real-Time Synchronization
- Synchronization Overview
- Data Synchronization Topologies
-
To the Cloud
- From MySQL to MySQL
- From MySQL to PostgreSQL
- From MySQL to GaussDB Distributed
- From MySQL to GaussDB Centralized
- From MySQL to GaussDB(DWS)
- From MySQL to TaurusDB
- From MySQL to MariaDB
- From PostgreSQL to PostgreSQL
- From PostgreSQL to GaussDB(DWS)
- From PostgreSQL to GaussDB Centralized
- From PostgreSQL to GaussDB Distributed
- From Oracle to MySQL
- From Oracle to TaurusDB
- From Oracle to GaussDB Centralized
- From Oracle to GaussDB Distributed
- From Oracle to DDM
- From Oracle to GaussDB(DWS)
- From Oracle to PostgreSQL
- From DDM to MySQL
- From DDM to GaussDB(DWS)
- From DDM to DDM
- From DB2 for LUW to GaussDB Centralized
- From DB2 for LUW to GaussDB Distributed
- From DB2 for LUW to GaussDB(DWS)
- From TiDB to TaurusDB
- From Microsoft SQL Server to GaussDB(DWS)
- From Microsoft SQL Server to GaussDB Centralized
- From Microsoft SQL Server to GaussDB Distributed
- From Microsoft SQL Server to Microsoft SQL Server
- From Microsoft SQL Server to MySQL
- From Microsoft SQL Server to TaurusDB
- From Microsoft SQL Server to PostgreSQL
- From MongoDB to DDS
- From MariaDB to MariaDB
- From MariaDB to MySQL
- From MariaDB to TaurusDB
- From TaurusDB to TaurusDB
- From Cassandra to GeminiDB Cassandra
- From Dynamo to GeminiDB Cassandra
- From Dynamo to GeminiDB Dynamo
- From AWS DocumentDB to DDS
- From Redis to GeminiDB Redis
- From Redis Cluster to GeminiDB Redis
-
Out of the Cloud
- From MySQL to MySQL
- From MySQL to Kafka
- From MySQL to CSS/ES
- From MySQL to Oracle
- From MySQL to MariaDB
- From DDM to MySQL
- From DDM to Oracle
- From DDM to Kafka
- From DDS to MongoDB
- From DDS to Kafka
- From PostgreSQL to PostgreSQL
- From PostgreSQL to Kafka
- From GaussDB Distributed to MySQL
- From GaussDB Distributed to Oracle
- From GaussDB Distributed to GaussDB(DWS)
- From GaussDB Distributed to Kafka
- From GaussDB Distributed to GaussDB Distributed
- From GaussDB Distributed to GaussDB Centralized
- From GaussDB Distributed to PostgreSQL
- From GaussDB Centralized to MySQL
- From GaussDB Centralized to Oracle
- From GaussDB Centralized to GaussDB(DWS)
- From GaussDB Centralized to Kafka
- From GaussDB Centralized to GaussDB Distributed
- From GaussDB Centralized to GaussDB Centralized
- From GaussDB Centralized to PostgreSQL
- From TaurusDB to MySQL
- From TaurusDB to GaussDB(DWS)
- From TaurusDB to Kafka
- From TaurusDB to CSS/ES
- From TaurusDB to Oracle
- From MariaDB to MariaDB
- From Microsoft SQL Server to Kafka
- From GeminiDB Redis to Redis
- From GeminiDB Redis to Redis Cluster
-
Between Self-built Databases
- From MySQL to Kafka
- From MySQL to CSS/ES
- From MySQL to GaussDB Centralized
- From MySQL to GaussDB Distributed
- From Oracle to Kafka
- From Oracle to GaussDB Centralized
- From Oracle to GaussDB Distributed
- From PostgreSQL to Kafka
- From PostgreSQL to GaussDB Centralized
- From PostgreSQL to GaussDB Distributed
- From GaussDB Centralized to MySQL
- From GaussDB Centralized to Oracle
- From GaussDB Centralized to Kafka
- From GaussDB Centralized to GaussDB Distributed
- From GaussDB Centralized to GaussDB Centralized
- From GaussDB Centralized to PostgreSQL
- From GaussDB Distributed to MySQL
- From GaussDB Distributed to Oracle
- From GaussDB Distributed to Kafka
- From GaussDB Distributed to GaussDB Distributed
- From GaussDB Distributed to GaussDB Centralized
- From GaussDB Distributed to PostgreSQL
- From DB2 for LUW to GaussDB Centralized
- From DB2 for LUW to GaussDB Distributed
- From Microsoft SQL Server to Kafka
- Two-Way Synchronization
-
Task Management
- Creating a Synchronization Task
- Querying the Synchronization Progress
- Viewing Synchronization Logs
- Data Comparison (Comparing Synchronization Items)
- Managing Objects
- Managing Parameters
-
Task Life Cycle
- Viewing Task Details
- Modifying Task Information
- Modifying Connection Information
- Modifying the Flow Control Mode
- Changing the Synchronization Mode
- Editing a Synchronization Task
- Resuming a Synchronization Task
- Skipping Data and Resuming a Synchronization Task
- Pausing a Synchronization Task
- Resetting a Synchronization Task
- Resetting Synchronization Position
- Restarting a Synchronization Task
- Skipping DDL Statements
- Performing a Switchover for a Dual-AZ Task
- Exchanging the Direction for a Two-Way Synchronization Task
- Changing a Single-AZ Task to a Dual-AZ Task
- Cloning a Synchronization Task
- Changing Specifications
- Unsubscribing from a Yearly/Monthly Task
- Stopping a Synchronization Task
- Deleting a Synchronization Task
- Importing Tasks in Batches
- Filtering Large Fields
- Upgrading the Version of a DRS Task
- Task Statuses
- Tag Management
- Connection Diagnosis
- Viewing Abnormal Data
- Interconnecting with CTS
- Interconnecting with Cloud Eye
- Interconnecting with LTS
-
Operation Reference in Synchronization Scenarios
- Kafka Message Format
- Kafka Authentication
- Synchronizing Sequence Values for a Synchronization Task with GaussDB Distributed Serving as the Source Database
- Forcibly Stopping Synchronization of GaussDB Distributed
- Forcibly Stopping Synchronization of GaussDB Centralized
- Forcibly Stopping Synchronization of PostgreSQL
- Creating Event Triggers and Functions to Implement Incremental DDL Synchronization for PostgreSQL
- Appendix
- Data Subscription
-
Real-Time Disaster Recovery
- DR Overview
- DR Scenarios
-
Task Management
- Creating a DR Task
- Querying the DR Progress
- Viewing DR Logs
- Data Comparison (Comparing DR Items)
-
Task Life Cycle
- Viewing DR Data
- Modifying Task Information
- Modifying Connection Information
- Modifying the Flow Control Mode
- Disabling or Enabling Read-Only
- Editing a DR Task
- Resuming a DR Task
- Pausing a DR Task
- Retrying a DR Task
- Resetting a DR Task
- Viewing DR Metrics
- Performing a Switchover for a Dual-AZ Task
- Performing a Primary/Standby Switchover for DR Tasks
- Exchanging the DR Direction
- Changing Specifications
- Unsubscribing from a Yearly/Monthly Task
- Stopping a DR Task
- Deleting a DR Task
- Upgrading the Version of a DRS Task
- Task Statuses
- Connection Information Management
- Tag Management
- Connection Diagnosis
- Interconnecting with CTS
- Interconnecting with Cloud Eye
- Interconnecting with LTS
- Workload Replay
- Data Verification
-
Preparations
-
Best Practices
- Best Practices Summary
-
Real-Time Migration
- Migrating MySQL Databases from Other Clouds to RDS for MySQL
- From Other Cloud MySQL to TaurusDB
- From Other Cloud MongoDB to DDS
- From ECS-hosted MySQL to RDS for MySQL
- From ECS-hosted MySQL to TaurusDB
- From ECS-hosted MongoDB to DDS
- From On-Premises MySQL to RDS for MySQL
- From On-Premises MongoDB to DDS
- From RDS for MySQL to DDM
- From MySQL Schema and Logic Table to DDM
- Backup Migration
-
Real-Time Synchronization
- From Other Cloud PostgreSQL to RDS for PostgreSQL
- From ECS-hosted PostgreSQL to RDS for PostgreSQL
- From On-Premises PostgreSQL to RDS for PostgreSQL
- From On-premises MySQL to GaussDB Distributed
- From On-premises Oracle to GaussDB Distributed
-
From On-premises Oracle to GaussDB Centralized
- Purpose
- Resource Planning
- Operation Process
- Preparations
- Creating a VPC and Security Group
- Creating a GaussDB Instance
- Creating a UGO Task
- Creating a DRS Task
-
Starting Synchronization
- UGO Schema Migration Phase 1: Tables, Primary Keys, Unique Keys/Indexes
- DRS Synchronization Phase 1: Full Synchronization
- UGO Schema Migration Phase 2: Common Indexes
- DRS Synchronization Phase 2: Incremental Synchronization
- UGO Schema Migration Phase 3: Triggers, Events, Tasks, Foreign Keys, and Sequences
- From On-Premises Oracle to DDM
- From RDS for MySQL to Kafka
- From GaussDB Distributed to Kafka
- From GaussDB Centralized to Kafka
- Real-Time Disaster Recovery
- Security Best Practices
- Security White Paper
-
API Reference
- Before You Start
- API Overview
- Calling APIs
- Getting Started
- APIs V3.0 (Recommended)
-
APIs V3.0 (Deprecated)
-
Public API Management
- Creating Tasks in Batches
- Testing Connections in Batches
- Testing Connections in Batches (Cluster Mode)
- Modifying Tasks in Batches
- Selecting Database Objects in Batches
- Performing a Batch Pre-Check
- Querying Pre-check Results in Batches
- Setting Flow Control for Tasks
- Obtaining Database Parameters in Batches
- Modifying Database Parameters
- Starting Tasks in Batches
- Resuming or Retrying Tasks in Batches
- Pausing Tasks in Batches
- Stopping or Deleting Tasks in Batches
- Changing the Passwords of the Source and Destination Databases in Batches
- Setting Definers in Batches
- Creating a Comparison Task
- Querying Comparison Results
- Querying Tasks of a Tenant
- Querying Task Details in Batches
- Querying Task Statuses in Batches
- Configuring Exception Notifications
- Querying Available Node Specifications
- Querying Data-level Table Comparison Tasks
- Creating a Data-level Table Comparison Task
- Canceling a Comparison Task
- Immediately Starting a Data-level Table Comparison Task
- Querying the Row Comparison Overview
- Querying Row Comparison Details
- Querying the Value Comparison Overview
- Querying Value Comparison Details
- Querying Value Comparison Differences
- Creating an Object-level Comparison Task
- Querying the Overview of an Object Comparison Task
- Querying Details About an Object Comparison Task
- Exporting the Result File of a Comparison Task
- Downloading the Result File of a Comparison Task
- Real-Time Migration Management
- Real-Time Synchronization Management
- Real-Time Disaster Recovery Management
-
Public API Management
-
APIs V5.0 (in OBT)
- Resource Management
- Task Management
-
Management of Tasks Created Asynchronously in Batches
- Asynchronously Creating Tasks in Batches
- Submitting Tasks Created Asynchronously in Batches
- Querying the List of Tasks Created Asynchronously in Batches
- Querying Details About Tasks Created Asynchronously in Batches with a Specified ID
- Updating Details About Tasks Created Asynchronously in Batches with a Specified ID
- Downloading the Task Import Template
- Importing Tasks in Batches
-
Database Object Configuration
- Submitting the Query of Database Object Information
- Submitting the Query of Database Object Information
- Obtaining the Result of Querying Database Object Information
- Querying Database Object Information
- Querying Database Object Information
- Downloading the Object Import Template
- Uploading the Object Import Template
- Querying the Progress of Uploading the Object Import Template
- Obtaining the Result of Uploading the Object Import Template
- Obtaining the Progress of Saving Objects
- Querying the Synchronization Mapping List
- Querying Whether Object Selection and Column Mapping Are Supported
- Task Details
-
Task Operations
- Performing Operations on a Task with a Specified ID
- Collecting Database Position Information
- Stopping a Task
- Batch Performing Operations on Tasks with Specified IDs
- Batch Stopping Tasks
- Obtaining the Operations Allowed in a Specified Task
- Obtaining the Result for Querying Database Position
- Verifying a Task Name
- Updating the Start Point of an Incremental Task
- Uploading a Driver File (Deprecated)
- Deleting a Driver File (Deprecated)
- Synchronizing a Driver File (Deprecated)
- Querying the Driver File List (Deprecated)
- Uploading a Driver File
- Deleting a Driver File
- Querying the Driver File List
- Synchronizing a Driver File
- Comparison Management
- Enterprise Projects
-
Data Processing
- Updating Data Processing Rules for a Specified Task
- Obtaining the Data Processing Rule Update Result for a Specified Task
- Querying Data Processing Rules
- Verifying Data Filtering Rules
- Obtaining the Data Filtering Verification Result
- Collecting Column Information About a Specified Database Table
- Obtaining Column Information About a Specified Database Table
- Parameter Management
- Tag Management
- Permissions Management
- Workload Replay
- Connection Management
- Configuration Management
- Backup Migration
- Application Examples
- Permissions Policies and Supported Actions
- Appendix
- SDK Reference
-
FAQs
-
Product Consulting
- What Are Regions and AZs?
- What Is DRS?
- Can DRS Migrate RDS Primary/Standby Instances?
- What Constraints Does DRS Have for a Source Database?
- What Requirements Does DRS Have for a Destination Database?
- Does DRS Use Concurrency?
- Dose DRS Use Data Compression?
- Does DRS Support Migration Between the Public Cloud and the Dedicated Cloud?
- What Is the Quota?
- Does DRS Support Migration from DB2 for LUW to PostgreSQL?
- Can Microsoft SQL Server Database Synchronize Data with Local Databases in Real Time?
- Does DRS Support Data Replication in a Specified Time Period?
- Does DRS Support Resumable Uploads?
- What Is Single-Active/Dual-Active Disaster Recovery?
- What Are the Differences Between Real-Time Migration, Real-Time DR, and Real-Time Synchronization?
- How Do I Solve the Table Bloat Issue During MySQL Migration?
- How Does MySQL Data Synchronization Affect the Source and Destination Databases?
- Do I Need to Stop Services Running on the Source Database?
- What Is an SMN Topic?
- What Are the Differences Between Single-AZ and Dual-AZ DRS Tasks?
- Can DRS Migrates Table Structures Only?
- How Do I Migrate Accounts in MySQL Migration, Synchronization, and DR Tasks and Can I Change Passwords?
- What Factors Affect the DRS Task Speed and How Do I Estimate the Time Required?
- Can I Modify Objects in a DRS Task?
- Does DRS Support Data Synchronization Between Different Databases of the Same DB Instance?
- Which Operations on the Source or Destination Database Affect the DRS Task Status?
- What Are Differences Between Data Subscription and Synchronization from MySQL to Kafka?
- Why Cannot Standby Read Replicas on Some Other Clouds Be Used as the Source Database?
- Does DRS Support Migration of Users Encrypted by the Caching_sha2_password Plugin?
- Why Is the Database Disk Usage Inconsistent Before and After Data Migration?
- What Is the Serialization Mode of Messages Sent by DRS to Kafka?
- Does DRS Support Migration of Self-Built MySQL Databases?
- Does DRS Automatically Clear Data in the Destination Table?
- What Are the Differences Between To the Cloud, Out of the Cloud, and Self-built?
- Does DRS Support Data Flow from Self-Built MySQL to Self-Built MySQL?
- What Is the Minimum Transmission Granularity of DRS?
- What Are the Impacts on DRS If I Perform Operations on the Destination Database During Data Migration?
-
Network and Security
- What Security Protection Policies Does DRS Have?
- What Can I Do If the Network Is Disconnected During the Migration?
- Which Database Accounts Are Required During Migration?
- How Do I Configure a VPC Security Group to Allow Network Communication?
- What Can I Do If the Network Connection Between the Replication Instance and Database Is Abnormal?
- How Can the Source and Destination Databases Communicate Across VPCs?
- What Is the EIP Bandwidth of DRS?
- Does DRS Support Cross-Account Cloud Database Migration?
-
Permissions Management
- How Do I Set an Independent Oracle Account That Has the Least Privilege and Uses DRS?
- Which MySQL Permissions Are Required for DRS?
- How Can I Import Users and Permissions from the Source to the Destination Database?
- Why Cannot Scheduled DRS Tasks Be Started?
- What Can I Do If A Message Is Displayed Indicating that the User Has Insufficient Permissions Or Does Not Have the Permission to Create a DRS Task?
- Which PostgreSQL Permissions Are Required for DRS?
- What Are the Impacts on the Source Database If the Lock Table Permission Is Required When the Source Database Contains Tables Without Primary Keys?
-
Real-Time Migration
- When Can I Stop a Migration Task?
- How Do I Maintain the Original Service User Permission System After Definer Is Forcibly Converted During MySQL Migration?
- What Can I Do If the Invoking Permission Problem Occurs After the MySQL Stored Procedure Is Migrated to the Cloud?
- How Do I Ensure that All Services on the Database Are Stopped?
- What Can I Do When Message "can not get agency token" Is Displayed in the Migration Log
- What Do I Do If the Maximum Index Length Has Been Reached During Migration from Oracle to MySQL?
- Why Is the Collation of Heterogeneous or Oracle Databases Converted to utf8mb4_bin After Those Databases Are Migrated to MySQL?
- What Can I Do If MyISAM Tables Are Not Supported by RDS for MySQL?
- What Are the Precautions for Migrating Data from an Earlier Version MySQL to MySQL 8.0?
- What Can I Do When OOM Occurs During the Migration of MongoDB Databases?
- How Do I Disable the Balancer?
- How Do I Export and Import Events and Triggers in Batches?
- How Can I Migrate Databases or Tables Whose Names Contain Uppercase Letters?
- How Do I Delete Orphaned Documents in MongoDB Sharded Clusters?
- What Can I Do If There Is an Extra Backslash (\) After a MySQL Account Is Migrated?
- Backup Migration
-
Real-Time Synchronization
- Can DRS Sync Tables of Different Schemas to the Same Schema?
- Can Online DDL Tools Be Used for Real-time Synchronization?
- Does DRS Support Two-Way Real-time Synchronization?
- Why Do I Use the SCAN IP Address to Connect to an Oracle RAC Cluster?
- How Do I Check Supplemental Logging of the Source Oracle Database?
- Suggestions on Synchronizing Data to GaussDB(DWS)
- Character Set Compatibility Between Oracle and GaussDB
- Garbled Characters or Synchronization Failure Due to Incompatible Character Sets
- How Do I Specify the Start Point for DRS Incremental Synchronization?
- What Are Syntax Differences Between MySQL or MariaDB Versions?
-
Configuring Remote Connection to a GaussDB Database
- Configuration Description
- Configuration Method for a Synchronization Task from GaussDB Centralized
- Configuration Method for a Synchronization Task from GaussDB Distributed in Multi-Task Mode
- Configuration Method for a Synchronization Task from GaussDB Distributed in Single-Task Mode
- Enabling Data Read from Standby Node for a Distributed GaussDB Instance
- Connection and Port Description for Incremental Synchronization from GaussDB
- What Should I Do If Data Inconsistency Occurs Due to Inconsistent Primary Keys or Unique Keys of DRS?
- What Can I Do If DDL Migration Is Not Configured for a Started Task and the Task Requires DDL Migration Again?
- Does DRS Support Synchronization from MySQL 8.0 to MySQL 5.7?
- How Do I Add or Delete Tables in a Synchronization Task That Has Been Started?
- Table Name Mapping and Topic Mapping Supported During Object File Import for Synchronization from GaussDB to Kafka
- Data Subscription
-
Real-Time Disaster Recovery
- What Are RPO and RTO of DRS Disaster Recovery?
- How Do I Select Active Database 1 and 2 for Dual-Active DR?
- What Is the Meaning of Forward and Backward Subtasks in Dual-Active Disaster Recovery?
- Common Exceptions in Real-Time Disaster Recovery
- Is a Primary/Standby Switchover Triggered Automatically or Manually for DR Tasks?
- Can Real-Time DR Be Performed for Specified Databases?
- How Do I Configure Source Database Information for a DDM DR Task?
- Why Does a Real-Time DR Task Not Support Triggers and Events?
- Data-Level Comparison
-
General Operations
- What Can I Do When Information Overlaps on the DRS Console?
- Is the Destination Instance Set to Read-only or Read/Write?
- How Do I Set Global binlog_format=ROW to Take Effect Immediately?
- How Do I Set binlog_row_image=FULL to Take Effect Immediately?
- How Do I Change the Destination Database Password to Meet the Password Policy?
- How Do I Configure the Shard Key for a MongoDB Sharded Cluster?
- Does Bandwidth Expansion Affect the Running DRS Tasks?
- Why Data in MariaDB and SysDB Cannot Be Migrated or Synchronized?
- Constraints and Operation Suggestions on Many-to-One Scenario
- Constraints and Operation Suggestions on One-to-Many Scenario
- Where Can I View DRS Operation Logs?
- Why Is the Language of the Message Sent by DRS Inconsistent with That on the Page?
- Why Is a DRS Task Automatically Stopped?
- How Can I Export a DRS Task List?
- Can a Completed Task Be Restarted?
- What Are the Differences Between Resetting a Task and Recreating a Task?
- Does DRS Support Backward Migration/Synchronization?
- Why Cannot I Select an Existing SMN Topic?
- Can I Change an SMN Topic After a Task Is Created?
- How Do I Set the Number of Source Shards and Source Database Information When DDM Is the Source Database?
- Will Data of DRS Tasks Be Lost After a Primary/Standby Switchover Occurs on the Source MySQL Database?
- What Are the Differences Between All, Tables, and Databases During DRS Object Selection?
- What Do I Do After Changing the Password of the Source or Destination Database?
- How Do I Configure an SMN Topic Policy to Allow DRS to Publish Messages?
- What Can I Do If a DRS Task Times Out Due to Too Many Tables?
- Can I Change the Source or Destination Database After a DRS Task Is Created?
- Are v5 APIs Available?
- How Long Does It Take to Pause, Stop, and Resume a DRS Task?
-
Billing
- Do I Have to Pay For Failed Tasks?
- Do I Have to Pay For Paused Tasks?
- Will DRS Tasks That Are Not Started Be Billed?
- What Will Happen to My Tasks After The Yearly/monthly Subscription Expires?
- Will I Be Charged If I Do Not Delete a Task After It Is Completed?
- Resource Freezing, Release, Deletion, and Unsubscription
- Delay
-
Product Consulting
-
Troubleshooting
-
Solutions to Failed Check Items
- Disk Space
-
Database Parameters
- Checking Whether the Source Database Binlog Is Enabled
- Checking Whether the Source Database Binlog Is Row-Based
- Checking Whether the expire_logs_days Value in the Source Database Is Correct
- Checking Whether the Source and Destination Database Character Sets Are Consistent
- Checking Whether the Source Database server_id Meets the Incremental Migration Requirements
- Checking Whether the Source and Destination Database Table Names Are Consistent in Case Sensitivity
- Checking Whether the Source Database Contains Object Names with Non-ASCII Characters
- Checking Whether the time_zone Values of the Source and Destination Databases Are the Same
- Checking Whether the collation_server Values of the Source and Destination Databases Are the Same
- Checking Whether the SERVER_UUID Values of the Source and Destination Databases Are the Same
- Checking Whether the SERVER_ID Values of the Source and Destination Databases Are Different
- Checking Whether the Source Database Contains Invalid sql_mode Values
- Checking Whether the sql_mode Values of the Source and Destination Databases Are the Same
- Checking Whether the sql_mode Value in the Destination Database Is Not no_engine
- Checking Whether the innodb_strict_mode Values of the Source and Destination Databases Are the Same
- Checking Whether the max_wal_senders Value of the Source Database Is Correctly Configured
- Checking Whether the WAL_LEVEL Value in the Source Database Is Correct
- Checking Whether the MAX_REPLICATION_SLOTS Value in the Source Database Is Correct
- Checking Whether the Source Database Is on Standby
- Checking Whether the log_slave_updates Value in the Source Database Is Correct
- Checking Whether the BLOCK_SIZE Value of the Source Database Is the Same as That of the Destination Database
- Checking Whether the binlog_row_image Value is FULL
- Checking Whether the Transaction Isolation Levels are Consistent
- Checking Whether the lc_monetary Values of the Source and Destination Databases Are the Same
- Checking Whether the Source Database Contains Trigger Names with Non-ASCII Characters
- Checking Whether the Source Database Collections Contain More Than 10 Indexes
- Checking Whether the Source Database Collections Contain TTL Indexes
- Checking Whether log_bin_trust_function_creators Is Set to On in Both the Source and Destination Databases
- Checking Whether GTID Is Enabled for the Source Database
- Checking Whether GTID Is Enabled for the Destination Database
- Checking Whether log_bin_trust_function_creators Is Set to On in the Destination Database
- Checking Whether the Values in the Source Oracle Database Are Out of the Ranges of the MySQL Database
- Checking Whether the max_allowed_packet Value of the Destination Database Is too Small
- Checking Whether the Source Database User Has the Permission to Parse Logs
- Checking Whether the ExpireLogsDays Value Is 0
- Checking Whether the Source Database Character Set Is Supported
- Checking Whether the Length Table and Field Names Is Not Supported
- Checking Whether the Databases and Tables Exist
- Checking Whether the Supplemental Log Level of the Source Database Meets Requirements
- Checking Whether the Length of the Source Database Object Names Exceeds the Limit
- Checking Whether session_replication_role of the Destination Database Is correctly Set
- Checking the Database Compatibility Type
- Checking Whether the Collation of the Destination Database Is Correct
- Checking Whether the Index Name Is Supported
- Checking Whether Tables Structures Are Consistent
- Checking Whether Existing Data Meets the Constraints
- Checking the Additional Column of the Destination Database
- Checking Whether Implicit Primary Key Check Is Enabled for the Primary and Standby Databases
- Checking Whether the Source Table Replication Attribute Is Correct
- Checking Whether the Specified Replication Slot Exists in the Source Database
- Checking Whether the MongoDB Instance Type Matches the Migration Mode
- Checking the Physical Standby Database
- Checking Whether the Case Sensitivity of the Destination Database Is Configured
- Checking Whether CDC is Enabled for Tables in the Source Database
- Checking Whether the CDC Retention Period in the Source Database Is Long Enough
- Checking Whether the Source and Destination Databases Have Different Computer Names
- Checking Whether the Length of the Source Database Name Exceeds 64
- Synchronization Object Name Check
- Checking Whether the Source Database Contains Disabled Clustered Indexes
- Checking Whether the Source Database Is Empty
- Checking Whether the Source Database Uses the Full Recovery Model
- Checking the Synchronization Objects
- Checking Whether the Source Database Tables Contain Data Types Not Supported for Migration
- Checking Whether the SQL Server Agent of the Source Database Is Enabled
- Checking Whether the Values of group_concat_max_len Are Consistent
- Checking Whether the Table Structures of the Source Database Are Consistent
- Checking Whether the Character Sets Are Compatible
- Whether There Are XA Transactions That Have Not Been Submitted for a Long Time in the Source Database
- Whether the Selected Objects Exist in the Destination Database
- Destination Database Same Name Check
- Whether the Destination Database User (Schema) and Table Exist
- Whether the Maximum Number of Indexed Columns Has Been Reached
- Checking the Length of the Index Column in the Source Database
- Whether the Table Structures (Including Primary Key Indexes and the Number of Columns) of the Source Oracle Database and Destination Database Middleware Are Aligned
- Whether Synchronization Objects Exist in the Destination Database
- Whether the Source Database Contains Encrypted Objects
- Checking Whether the Source Database Contains Unsupported Table Field Types
- Checking Replication Attribute of Primary Key Columns
- Whether There Are Tables Containing Fields of the longtext or longblob Type in the Synchronization Object
- Checking Database Mapping Objects
- Whether the Source Database Is the Standby Database of a TaurusDB Instance
- Checking Whether Type Names Mapped to the Destination Database Are Valid
- Checking Whether the Source and Destination Database Character Sets Are Consistent
- Checking Whether Data Replication Is Enabled for the Source Database
- Checking Whether the Maximum Sequence Number of the Source Database is Less Than That of the Destination Database
- Checking Whether Interval Partitioned Tables Are Included in the Source Database
- Oracle Account Check in the Source Database
- Checking the Number of DNs in the Source Database
- Whether the Selected Objects Exist in the Destination Database
- Whether There Are Foreign Keys Containing Unsupported Reference Operations in the Source Database
- Whether the Selected Table Contains Delay Constraints
- Whether the Source Database Tables Contain Primary Keys
- Whether Foreign Keys Are Disabled or Tables to Be Synchronized Have Foreign Keys in the Destination Database
- Whether There Are Composite Hash Indexes in the Source Collection
- Whether There Are Composite Hash Shard Keys in the Source Collection
- Whether the Source Table Structure Contains Newline Characters
- Whether There Are Tables Containing Fields of the bytea or text Type in the Synchronization Object
- Checking Whether the Source Table Structure Contains Virtual Columns
- Whether the max_allowed_packet Value of the Source Database Is Too Small
- Whether the Supplemental Log Level in the Source Database Is Correct
- Whether Kafka Topics Have Been Created
- Whether the Source Database Kernel Encoding Supports Data Replication
- block_encryption_mode Consistency Check
- Character Type and Sorting Rule Check in the Destination Database
- Column Name Check in the Source Database
- Whether the Destination Schemas and Table Objects Are Consistent
- Source Encrypted Table Check
- Checking Whether the Source Table Replication Attribute Is Correct
- Partition Table Check on the Source Database
- Checking Whether the Source Database Contains Unsupported Generated Columns
- Checking Whether the ENABLE_SLOT_LOG Value of the Source Database Is Correct
- Source DB Instance Statuses
-
Destination DB Instance Statuses
- Checking Whether the Destination DB Instance Is Available
- Checking Whether the Destination Database Is Involved in Another Migration Task
- Checking Whether the Destination Database Has a Read Replica
- Checking Whether the Destination Database Is Read-Only
- Checking Whether the Extensions Are Supported
- Checking Whether Destination Contains the Configured Database
- Checking Whether the Destination DB Instance Is Available
- Checking Whether the Destination Database Is Empty
- Checking Whether There Are Foreign Keys that Are Not Disabled in the Destination Database Table
- Checking Whether There Are Enabled Triggers in an Existing Destination Database Table
- Database User Permissions
- Database Versions
- Networks
-
Database Objects
- Checking Whether the Source Database Contains a MyISAM Table
- Checking Whether the Source Database Contains the Functions or Stored Procedures that the Source Database User Is Not Authorized to Migrate
- Checking Whether Objects with the Same Names Exist in the Source Database
- Whether the Source Database Contains Unlogged Tables
- Checking Whether the Names of Views to Be Migrated Are the Same
- Checking Whether the _Id Fields in the Collection of the Source Database Have Indexes
- Checking Whether the Index Length of the Source Database Exceeds the Limit
- Checking Whether the Source Database Tables Use Storage Engines Not Supported by the Destination Database
- Checking Whether the Database Names Mapped to the Destination DB Instance Contain Unsupported Characters
- Checking Whether the Source Database Tables Contain Primary Keys
- Checking Whether the Source Database Contains Triggers or Events
- Checking Whether the Source Database Referenced Roles Pass the Check
- Checking Whether the Source Database Referenced Accounts Pass the Check
- Checking Whether the Source Database Contains Schemas or Users Named cdc
- Checking Whether Associated Objects Are Selected
- Checking Whether the Specified Objects Exist In the Destination Database
- Checking Whether the Source Table Contains Column Types that Cannot Be Used as Distribution Keys
- Checking Whether the Source Table Contains Unsupported Table Field Types
-
Database Configuration Items
- Checking Whether the Source Database Name Is Valid
- Checking Whether the Source Database Table Name Is Valid
- Checking Whether the Source Database View Name Is Valid
- Checking Whether the Source Database Collection Name Is Valid
- Checking Whether the Shard Key Can Be Obtained from the Source Database
- Checking Whether the Source Database Schema Name Is Valid
- Checking Whether the Maximum Number of Chunks in the Destination Database Is Sufficient
- Checking Whether Archive Logs Are Enabled on the Source Oracle Database
- Checking Whether Supplemental Logging Is Correctly Enabled on the Source Database
-
Conflicts
- Checking Whether the Names of the Source and Destination Databases Are the Same
- Checking Whether the Same View Names Exist in Both the Source and Destination Databases
- Checking Whether the Destination Database Contains a Non-Empty Collection with the Same Name As the Source Database
- Checking Whether Destination Database Contains the Same Table Names As the Synchronization Objects
- Checking Whether the Destination Database Contains Objects with the Same Name As Those in the Source Database
- Checking Whether Collections in Both the Source and Destination Databases Are Not Capped
-
SSL Connections
- Checking Whether the SSL Connection Is Correctly Configured
- Checking Whether the SSL Connection Is Enabled for the Source Database
- Checking Whether the SSL Certificate of the Source Database Exists
- Checking Whether the SSL Certificate of the Destination Database Exists
- Checking Whether Both the Source and Destination Databases Use SSL
- Object Dependencies
- Source Database Information
- Pre-Check Timeout
-
Failure Cases
- Case Overview
-
Real-Time Migration from MongoDB to DDS
- Full Migration Error: Prematurely reached end of stream
- Full Migration Error: not authorized on *** to execute command {***}
- Full Migration Error: GC overhead limit exceeded
- Full Migration Error: The background process is unavailable. Maybe it has been killed manually or by the operating system. Please restart the task if possible or wait for restarting by itself within 5 minutes."
- Full Migration Error: Timed out after 60000 ms while waiting to connect
- Full or Incremental Migration Error: Timed out after 60000 ms while waiting to connect
- Full or Incremental Migration Error: Invalid BSON field name ***
- Incremental Migration Error: Timed out after 60000 ms while waiting for a server that matches com.mongodb.client.internal
- Incremental Migration Error: Command failed with error *** (***):***. The full response is {***}"
-
Real-Time Migration and Synchronization from MySQL to MySQL
- Full Phase Error: Table *** doesn't exist
- Full Phase Error: The background process is unavailable
- Full Phase Error: Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
- Full Phase Error: Error writing file *** (errno: 28 - No space left on device)
- Full Phase Error: The MySQL server is running with the --super-read-only option so it cannot execute this statement
- Full Phase Error: The table *** is full
- Full Phase Error: Unknown column *** in 'field list'
- Full Phase Error: Lock wait timeout exceeded; try restarting transaction
- Full Phase Error: Java heap space
- Full Phase Error: Table *** already exists
- Full Phase Error: temp table: *** not exist
- Full Phase Error: failed to create new session
- Full Phase Error: load table: *** failed
- Full Phase Error: extract table structure failed!
- Full Phase Error: read table=*** failed
- Full Phase Error: CANNOT UPDATE USER WITH NULL PASSWORD
- Full Phase Error: Access denied for user *** to database ***
- Full Phase Error: The MySQL server is running with the --super-read-only option so it cannot execute this statement
- Full Phase Error: Temporary file write failure.
- Full Phase Error: Incorrect prefix key; the used key part isn't a string, the used length is longer than the key part, or the storage engine doesn't support unique prefix keys
- Full Phase Error: Unknown database ***
- Full Phase Error: Access denied; you need (at least one of) the SUPER privilege(s) for this operation
- Full Phase Error: retry structures failed events and Table *** doesn't exist
- Full Phase Error: shard table=*** failed
- Full Phase Error: error when split table shard occur!
- Full Phase Error: Column name 'AUTO_PK_ROW_ID' is reserved.
- Full Phase Error: transfer account failed, can not find password from src DB
- Full Phase Error: Failed to add the foreign key constraint '***' to system tables
- Full Phase Error: Too many keys specified; max 64 keys allowed
- Full Phase Error: Unknown collation: 'utf8mb4_0900_ai_ci'
- Full Phase Error: exist some xa transactions for long times, may lack some data for this Job!.
- Full Phase Error: Invalid GIS data provided to function st_geometryfromtext'
- Full or Incremental Phase Error: Access denied for user ***
- Full or Incremental Phase Error: binlog is not existed
- Full or Incremental Phase Error: database log download failed
- Full or Incremental Phase Error: Can not read response from server
- Full or Incremental Phase Error: Communications link failure
- Full or Incremental Phase Error: EOF Packet received, master disconnected
- Full or Incremental Phase Error: Extract db create sql failed
- Full or Incremental Phase Error: load database structure failed in source database
- Full or Incremental Phase Error: load table: *** failed
- Full or Incremental Phase Error: Reached end of input stream
- Full or Incremental Phase Error: Read timed out
- Full or Incremental Phase Error: The background process is unavailable
- Full or Incremental Phase Error: Duplicate entry *** for key 'PRIMARY'
- Full or Incremental Phase Error: cause by: Index: ***, Size: ***
- Full or Incremental Phase Error: The offset and file name between src and parser is inconsistency
- Full or Incremental Phase Error: core process is not healthy or crashed
- Full or Incremental Phase Error: table info of table `***` from metadata miss
- Full or Incremental Phase Error: binlog parse fail, data dictionary may be not complete!
- Full or Incremental Phase Error: table *** record field size for insert/delete dml
- Full or Incremental Phase Error: service *** failed, cause by: Unable to connect to DBMS: ***
- Full or Incremental Phase Error: The binlog fetch connection may be interrupted
- Full or Incremental Phase Error: Received error packet: errno - 1047, solstate - HY000 errmsg = Unknown command
- Incremental Phase Error: not equals to target db column count
- Incremental Phase Error: The MySQL server is running with the --super-read-only option
- Incremental Phase Error: you need (at least one of) the SUPER privilege(s) for this operation
- Incremental Phase Error: Can't DROP ***; check that column/key exists
- Incremental Phase Error: Can't find file: *** (errno: 2 - No such file or directory)
- Incremental Phase Error: Data truncation: Data too long for column
- Incremental Phase Error: Failed to read file header from
- Incremental Phase Error: Lock wait timeout exceeded
- Incremental Phase Error: Must seek before attempting to read next event
- Incremental Phase Error: Table *** already exists
- Incremental Phase Error: Table *** doesn't exist
- Incremental Phase Error: Table *** not found in database
- Incremental Phase Error: source has more columns than target
- Incremental Phase Error: Unknown storage engine
- Incremental Phase Error: Unknown table
- Incremental Phase Error: You have an error in your SQL syntax
- Incremental Phase Error: not illegal for mariaDb gtid position
- Incremental Phase Error: without PK execute failed
- Incremental Phase Error: Deadlock found when trying to get lock
- Incremental Phase Error: current serverUUID not equals to this session
- Incremental Phase Error: Slave has more GTIDs than the master has, using the master's SERVER_UUID.
- Incremental Phase Error: Operation not allowed when innodb_force_recovery > 0
- Incremental Phase Error: filter data in config condition filter error
- Real-Time Migration and Synchronization from MySQL to TaurusDB
- Real-Time Synchronization from MySQL to CSS/ES
-
Real-Time Synchronization from PostgreSQL to PostgreSQL
- Task Startup Error: Initialize logical replication stream failed, the source database may have a long transaction: ****.
- Full Synchronization Error: function *** does not exist
- Full Synchronization Error: relation *** does not exist
- Full Synchronization Error: GC overhead limit exceeded
- Full Synchronization Error: Java heap space
- Full Synchronization Error: column *** of relation *** does not exist
- Full Synchronization Error: column *** does not exist
- Full Synchronization Error: type 'hstore' does not exist
- Full Synchronization Error: type 'geometry' does not exist
- Full Synchronization Error: Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections
- Full Synchronization Error: invalid locale name
- Full Synchronization Error: password must not equal user name
- Full Synchronization Error: permission denied for schema ***
- Full or Incremental Phase Error: service *** failed, cause by: Unable to connect to DBMS: ***
- Full or Incremental Phase Error: Initialize logical replication stream failed, the source database may have a long transaction
- Full or Incremental Phase Error: memory required is *** MB, maintenance_work_mem is *** MB
- Full or Incremental Phase Error: temporary file size exceeds temp_file_limit
- Incremental Synchronization Error: Table *** not found in target database
- Incremental Synchronization Error: remaining connection slots are reserved
- Incremental Synchronization Error: PL/pgSQL function *** line *** at SQL statement
- Incremental Synchronization Error: The replication slot does not exist and the task is not started for the first time.
-
Real-Time Synchronization with Oracle Serving as the Source
- Full Synchronization Error: has date/datetime: *** which is outside of dest allowed range
- Full or Incremental Phase Error: Got minus one from a read call
- Incremental Synchronization Error: Source supplemental log level is PK/UI. Missing column data at delete+insert on ***"
- Incremental Synchronization Error: timeout when get next file log, maybe has been deleted, please check it.
- Incremental Synchronization Error: Failed to construct kafka producer.
- Incremental Synchronization Error: Topic *** not present in metadata after 300000 ms
- Real-Time Synchronization with GaussDB Serving as the Source
- Real-Time DR with MySQL Serving as the Source
-
Backup Migration
- Backup Migration Failed Because Backup Files Cannot Be Found
- Backup Migration Failed Because a Backup Database Cannot Be Found in the Backup Files
- Backup Migration Failed Because the Database with the Same Name Already Exists
- Backup Migration Failed Because an Incremental Backup File Is Used
- Backup Migration Failed Because an Log Backup File Is Used
- Backup Migration Failed Because the Backup File Verification Failed
- Backup Migration Failed Because of Insufficient Space
- Backup Migration Failed Because Database Names Are Not Specified
- Backup Migration Failed Because a Full Backup File Is Used
- Backup Migration Failed Because the LSNs of Incremental Backup Files Are Inconsecutive
- Backup Migration Failed Because the Number of Databases to Be Restored Exceeds the Destination Database Threshold
- Workload Replay
- Data-Level Comparison
-
Solutions to Failed Check Items
- Videos
-
More Documents
-
User Guide (Paris Region)
- Service Overview
- Real-Time Migration
- Backup Migration
-
Real-Time Synchronization
- Data Synchronization Topologies
- To the Cloud
- Out of the Cloud
-
Task Management
- Creating a Synchronization Task
- Querying the Synchronization Progress
- Viewing Synchronization Logs
- Comparing Synchronization Items
- Managing Objects
-
Task Life Cycle
- Viewing Task Details
- Modifying Task Information
- Modifying Connection Information
- Modifying the Flow Control Mode
- Editing a Synchronization Task
- Resuming a Synchronization Task
- Pausing a Synchronization Task
- Resetting a Synchronization Task
- Stopping a Synchronization Task
- Deleting a Synchronization Task
- Task Statuses
- Tag Management
- Interconnecting with Cloud Eye
- Operation Reference in Synchronization Scenarios
-
FAQs
-
Product Consulting
- What Are Regions and AZs?
- What Is DRS?
- Can DRS Migrate RDS Primary/Standby Instances?
- Does DRS Support Resumable Uploads?
- What Are the Differences Between Real-Time Migration and Real-Time Synchronization?
- How Do I Solve the Table Bloat Issue?
- How Do I Select RDS Read Replicas on the DRS Console?
- How Does DRS Affect the Source and Destination Databases?
- Can DRS Migrates Table Structures Only?
- Network and Security
- Permissions Management
-
Real-Time Migration
- When Can I Stop a Migration Task?
- How Do I Maintain the Original Service User Permission System After Definer Is Forcibly Converted During MySQL Migration?
- What Can I Do If the Invoking Permission Problem Occurs After the MySQL Stored Procedure Is Migrated to the Cloud?
- How Do I Ensure that All Services on the Database Are Stopped?
- What Can I Do When Scheduled Task Failed to Start Leaving Message "can not get agency token"
- What Can I Do If MyISAM Tables Are Not Supported by RDS for MySQL?
- What Are the Precautions for Migrating Data from an Earlier Version MySQL to MySQL 8.0?
- What Can I Do When OOM Occurs During the Migration of MongoDB Databases?
- How Do I Disable the Balancer?
- How Do I Export and Import Events and Triggers in Batches?
- How Can I Migrate Databases or Tables Whose Names Contain Uppercase Letters?
- How Do I Delete Orphaned Documents in MongoDB Sharded Clusters?
- Backup Migration
-
Real-Time Synchronization
- Can DRS Sync Tables of Different Schemas to the Same Schema?
- Can Online DDL Tools Be Used for Real-time Synchronization?
- Which MySQL DDL Statements Can Be Directly Executed in GaussDB(DWS)?
- Why Do I Use the SCAN IP Address to Connect to an Oracle RAC Cluster?
- How Do I Check Supplemental Logging of the Source Oracle Database?
- Garbled Characters or Synchronization Failure Due to Incompatible Character Sets
- Data-Level Comparison
-
General Operations
- What Can I Do When Information Overlaps on the DRS Console?
- Is the Destination Instance Set to Read-only or Read/Write?
- How Do I Set Global binlog_format=ROW to Take Effect Immediately?
- How Do I Set binlog_row_image=FULL to Take Effect Immediately?
- How Do I Change the Destination Database Password to Meet the Password Policy?
- How Do I Configure the Shard Key for a MongoDB Sharded Cluster?
- Does Bandwidth Expansion Affect the Running DRS Tasks?
- Why Data in MariaDB and SysDB Cannot Be Migrated?
- Constraints and Operation Suggestions on Many-to-One Scenario
- Where Can I View DRS Operation Logs?
- Can a Completed Task Be Restarted?
- What Are the Differences Between Resetting a Task and Recreating a Task?
- What Do I Do After Changing the Password of the Source or Destination Database?
- Delay
-
Product Consulting
-
Troubleshooting
-
Solutions to Failed Check Items
- Disk Space
-
Database Parameters
- Checking Whether the Source Database Binlog Is Enabled
- Checking Whether the Source Database Binlog Is Row-Based
- Checking Whether the Binlog Retention Period Is Set on the Source Database
- Checking Whether the Source and Destination Database Character Sets Are Consistent
- Checking Whether the Source Database server_id Meets the Incremental Migration Requirements
- Checking Whether the Source and Destination Database Table Names Are Consistent in Case Sensitivity
- Checking Whether the Source Database Contains Object Names with Non-ASCII Characters
- Checking Whether the TIME_ZONE Values of the Source and Destination Databases Are the Same
- Checking Whether the COLLATION_SERVER Values of the Source and Destination Databases Are the Same
- Checking Whether the SERVER_UUID Values of the Source and Destination Databases Are the Same
- Checking Whether the SERVER_ID Values of the Source and Destination Databases Are Different
- Checking Whether the Source Database Contains Invalid sql_mode Values
- Checking Whether the SQL_MODE Values of the Source and Destination Databases Are the Same
- Checking Whether the sql_mode Value in the Destination Database Is Not NO_ENGINE_SUBSTITUTION
- Checking Whether the innodb_strict_mode Values of the Source and Destination Databases Are the Same
- Checking Whether the max_wal_senders Value of the Source Database Is Correctly Configured
- Checking Whether the WAL_LEVEL Value in the Source Database Is Correct
- Checking Whether the MAX_REPLICATION_SLOTS Value in the Source Database Is Correct
- Checking Whether the Source Database Is on Standby
- Checking Whether the log_slave_updates Value of the Source Database Is Correctly Configured
- Checking Whether the BLOCK_SIZE Value of the Source Database Is the Same as That of the Destination Database
- Checking Whether the binlog_row_image Value is FULL
- Checking Whether the Transaction Isolation Levels are Consistent
- Checking Whether the lc_monetary Values of the Source and Destination Databases Are the Same
- Checking Whether the Source Database Contains Trigger Names with Non-ASCII Characters
- Checking Whether the Source Database Collections Contain More Than 10 Indexes
- Checking Whether log_bin_trust_function_creators Is Set to On in Both the Source and Destination Databases
- Checking Whether log_bin_trust_function_creators Is Set to On in the Destination Database
- Checking Whether the max_allowed_packet Value of the Destination Database Is too Small
- Checking Whether the Databases and Tables Exist
- Checking Whether session_replication_role of the Destination Database Is correctly Set
- Checking Whether the MongoDB Instance Type Matches the Migration Mode
- Checking the Physical Standby Database
- Checking Whether the Values of group_concat_max_len Are Consistent
- Checking Whether the Character Sets Are Compatible
- Checking Replication Attribute of Primary Key Columns
- Checking Whether the Source and Destination Database Character Sets Are Consistent
- Source DB Instance Statuses
- Destination DB Instance Statuses
- Database User Permissions
- Database Versions
- Networks
-
Database Objects
- Checking Whether the Source Database Contains a MyISAM Table
- Checking Whether the Source Database Contains the Functions or Stored Procedures that the Source Database User Is Not Authorized to Migrate
- Checking Whether the Source Database Tables Use Storage Engines Not Supported by the Destination Database
- Checking Whether the Source Database Tables Contain Primary Keys
- Checking Whether the Source Database Contains Triggers or Events
- Database Configuration Items
- Conflicts
- SSL Connections
- Object Dependencies
- Failure Cases
-
Solutions to Failed Check Items
- Change History
-
User Guide (ME-Abu Dhabi Region)
- Service Overview
- Preparations
- Real-Time Migration
- Backup Migration
-
FAQs
- Product Consulting
- Network and Security
- Permissions Management
-
Real-Time Migration
- When Can I Stop a Migration Task?
- How Do I Maintain the Original Service User Permission System After Definer Is Forcibly Converted During MySQL Migration?
- What Can I Do If the Invoking Permission Problem Occurs After the MySQL Stored Procedure Is Migrated to the Cloud?
- How Do I Ensure that All Services on the Database Are Stopped?
- What Can I Do If MyISAM Tables Are Not Supported by RDS for MySQL?
- What Are the Precautions for Migrating Data from an Earlier Version MySQL to MySQL 8.0?
- How Do I Export and Import Events and Triggers in Batches?
- How Can I Migrate Databases or Tables Whose Names Contain Uppercase Letters?
- Backup Migration
- Data-Level Comparison
-
General Operations
- What Can I Do When Information Overlaps on the DRS Console?
- Is the Destination Instance Set to Read-only or Read/Write?
- How Do I Set Global binlog_format=ROW to Take Effect Immediately?
- How Do I Set binlog_row_image=FULL to Take Effect Immediately?
- How Do I Change the Destination Database Password to Meet the Password Policy?
- Does Bandwidth Expansion Affect the Running DRS Tasks?
- Why Data in MariaDB and SysDB Cannot Be Migrated?
- Constraints and Operation Suggestions on Many-to-One Scenario
- Where Can I View DRS Operation Logs?
- Can a Completed Task Be Restarted?
- What Are the Differences Between Resetting a Task and Recreating a Task?
-
Troubleshooting
-
Solutions to Failed Check Items
- Disk Space
-
Database Parameters
- Checking Whether the Source Database Binlog Is Enabled
- Checking Whether the Source Database Binlog Is Row-Based
- Checking Whether the Binlog Retention Period Is Set on the Source Database
- Checking Whether the Source and Destination Database Character Sets Are Consistent
- Checking Whether the Source Database server_id Meets the Incremental Migration Requirements
- Checking Whether the Source and Destination Database Table Names Are Consistent in Case Sensitivity
- Checking Whether the Source Database Contains Object Names with Non-ASCII Characters
- Checking Whether the TIME_ZONE Values of the Source and Destination Databases Are the Same
- Checking Whether the COLLATION_SERVER Values of the Source and Destination Databases Are the Same
- Checking Whether the SERVER_UUID Values of the Source and Destination Databases Are the Same
- Checking Whether the SERVER_ID Values of the Source and Destination Databases Are Different
- Checking Whether the Source Database Contains Invalid sql_mode Values
- Checking Whether the SQL_MODE Values of the Source and Destination Databases Are the Same
- Checking Whether the sql_mode Value in the Destination Database Is Not NO_ENGINE_SUBSTITUTION
- Checking Whether the innodb_strict_mode Values of the Source and Destination Databases Are the Same
- Checking Whether the log_slave_updates Value of the Source Database Is Correctly Configured
- Checking Whether the binlog_row_image Value is FULL
- Checking Whether the Transaction Isolation Levels are Consistent
- Checking Whether the Source Database Contains Trigger Names with Non-ASCII Characters
- Checking Whether log_bin_trust_function_creators Is Set to On in Both the Source and Destination Databases
- Checking Whether log_bin_trust_function_creators Is Set to On in the Destination Database
- Checking Whether the max_allowed_packet Value of the Destination Database Is too Small
- Checking Whether the Databases and Tables Exist
- Checking Whether the Values of group_concat_max_len Are Consistent
- Destination DB Instance Statuses
- Database User Permissions
- Database Versions
- Networks
-
Database Objects
- Checking Whether the Source Database Contains a MyISAM Table
- Checking Whether the Source Database Contains the Functions or Stored Procedures that the Source Database User Is Not Authorized to Migrate
- Checking Whether the Source Database Tables Use Storage Engines Not Supported by the Destination Database
- Checking Whether the Source Database Tables Contain Primary Keys
- Checking Whether the Source Database Contains Triggers or Events
- Database Configuration Items
- Conflicts
- SSL Connections
- Object Dependencies
- Failure Cases
-
Solutions to Failed Check Items
- Change History
-
User Guide (Kuala Lumpur Region)
- Service Overview
- Real-Time Migration
- Backup Migration
-
Real-Time Synchronization
- Data Synchronization Topologies
- To the Cloud
- Out of the Cloud
-
Task Management
- Creating a Synchronization Task
- Viewing the Synchronization Progress
- Viewing Synchronization Logs
- Comparing Items
- Managing Objects
-
Task Life Cycle
- Viewing Task Details
- Modifying Task Information
- Modifying Synchronization Information
- Editing a Synchronization Task
- Resuming a Synchronization Task
- Pausing a Synchronization Task
- Resetting a Synchronization Task
- Modifying the Flow Control Mode
- Stopping a Synchronization Task
- Deleting a Synchronization Task
- Task Statuses
- Operation Reference in Synchronization Scenarios
-
FAQs
-
Product Consulting
- What Is DRS?
- Can DRS Migrate RDS Primary/Standby Instances?
- Does DRS Support Resumable Uploads?
- What Are the Differences Between Data Migration and Synchronization?
- How Do I Solve the Table Bloat Issue?
- Why Cannot I Select RDS Read Replicas on the DRS Console?
- How Does DRS Affect the Source and Destination Databases?
- Network and Security
- Permissions Management
-
Real-Time Migration
- When Can I Stop a Migration Task?
- How Do I Maintain the Original Service User Permission System After Definer Is Forcibly Converted During MySQL Migration?
- What Can I Do If the Invoking Permission Problem Occurs After the MySQL Stored Procedure Is Migrated to the Cloud?
- How Do I Ensure that All Services on the Database Are Stopped?
- What Can I Do If MyISAM Tables Are Not Supported by RDS for MySQL?
- What Are the Precautions for Migrating Data from an Earlier Version MySQL to MySQL 8.0?
- How Do I Export and Import Events and Triggers in Batches?
- How Can I Migrate Databases or Tables Whose Names Contain Uppercase Letters?
- Backup Migration
-
Real-Time Synchronization
- Can DRS Sync Tables of Different Schemas to the Same Schema?
- Can Online DDL Tools Be Used for Real-time Synchronization?
- Which MySQL DDL Statements Can Be Directly Executed in GaussDB(DWS)?
- Why Do I Use the SCAN IP Address to Connect to an Oracle RAC Cluster?
- How Do I Check Supplemental Logging of the Source Oracle Database?
- Data-Level Comparison
-
General Operations
- What Can I Do When Information Overlaps on the DRS Console?
- How Do I Set Global binlog_format=ROW to Take Effect Immediately?
- How Do I Set binlog_row_image=FULL to Take Effect Immediately?
- How Do I Change the Destination Database Password to Meet the Password Policy?
- Does Bandwidth Expansion Affect the Running DRS Tasks?
- Why Data in MariaDB and SysDB Cannot Be Migrated?
- Constraints and Operation Suggestions on Many-to-One Scenario
- Where Can I View DRS Operation Logs?
- Can a Completed Task Be Restarted?
- What Are the Differences Between Resetting a Task and Recreating a Task?
-
Product Consulting
-
Troubleshooting
-
Solutions to Failed Check Items
- Disk Space
-
Database Parameters
- Checking Whether the Source Database Binlog Is Enabled
- Checking Whether the Source Database Binlog Is Row-Based
- Checking Whether the Binlog Retention Period Is Set on the Source Database
- Checking Whether the Source and Destination Database Character Sets Are Consistent
- Checking Whether the Source Database server_id Meets the Incremental Migration Requirements
- Checking Whether the Source and Destination Database Table Names Are Consistent in Case Sensitivity
- Checking Whether the Source Database GTID Is Enabled
- Checking Whether the Source Database Contains Object Names with Non-ASCII Characters
- Checking Whether the Source and Destination Database TIME_ZONE Values Are Consistent
- Checking Whether the COLLATION_SERVER Values of the Source and Destination Databases Are the Same
- Checking Whether the SERVER_UUID Values of the Source and Destination Databases Are the Same
- Checking Whether the SERVER_ID Values of the Source and Destination Databases Are Different
- Checking Whether the Source Database Contains Invalid sql_mode Values
- Checking Whether the SQL_MODE Values of the Source and Destination Databases Are the Same
- Checking Whether the sql_mode Value in the Destination Database Is Not NO_ENGINE_SUBSTITUTION
- Checking Whether the innodb_strict_mode Values of the Source and Destination Databases Are the Same
- Checking Whether the max_wal_senders Value of the Source Database Is Correctly Configured
- Checking Whether the WAL_LEVEL Value in the Source Database Is Correct
- Checking Whether the MAX_REPLICATION_SLOTS Value in the Source Database Is Correct
- Checking Whether the Source Database Is on Standby
- Checking Whether the log_slave_updates Value of the Source Database Is Correctly Configured
- Checking Whether the binlog_row_image Value is FULL
- Checking Whether the Transaction Isolation Levels are Consistent
- Checking Whether the lc_monetary Values of the Source and Destination Databases Are the Same
- Checking Whether the Source Database Contains Trigger Names with Non-ASCII Characters
- Checking Whether log_bin_trust_function_creators Is Set to On in Both the Source and Destination Databases
- Checking Whether log_bin_trust_function_creators Is Set to On in the Destination Database
- Checking Whether the max_allowed_packet Value of the Destination Database Is too Small
- Checking Whether the Databases and Tables Exist
- Destination DB Instance Statuses
- Database User Permissions
- Database Versions
- Networks
-
Database Objects
- Checking Whether the Source Database Contains a MyISAM Table
- Checking Whether the Source Database Contains the Functions or Stored Procedures that the Source Database User Is Not Authorized to Migrate
- Checking Whether the Source Database Tables Use Storage Engines Not Supported by the Destination Database
- Checking Whether the Source Database Tables Contain Primary Keys
- Checking Whether the Source Database Contains Triggers or Events
- Database Configuration Items
- Conflicts
- SSL Connections
- Object Dependencies
- Failure Cases
-
Solutions to Failed Check Items
- Change History
-
User Guide (Ankara Region)
- Service Overview
- Preparations
- Real-Time Migration
-
Real-Time Synchronization
- Synchronization Overview
- Data Synchronization Topologies
- To the Cloud
- Out of the Cloud
- Between Self-built Databases
-
Task Management
- Creating a Synchronization Task
- Querying the Synchronization Progress
- Viewing Synchronization Logs
- Comparing Synchronization Items
- Managing Objects
-
Task Life Cycle
- Viewing Task Details
- Modifying Task Information
- Modifying Connection Information
- Modifying the Flow Control Mode
- Editing a Synchronization Task
- Resuming a Synchronization Task
- Pausing a Synchronization Task
- Resetting a Synchronization Task
- Stopping a Synchronization Task
- Deleting a Synchronization Task
- Task Statuses
- Operation Reference in Synchronization Scenarios
- Real-Time Disaster Recovery
-
FAQs
-
Product Consulting
- What Are Regions and AZs?
- What Is DRS?
- Can DRS Migrate RDS Primary/Standby Instances?
- Does DRS Support Resumable Uploads?
- What Is Single-Active/Dual-Active Disaster Recovery?
- What Are the Differences Between Real-Time Migration, Real-Time DR, and Real-Time Synchronization?
- How Do I Solve the Table Bloat Issue During MySQL Migration?
- How Does DRS Affect the Source and Destination Databases?
- Can DRS Migrates Table Structures Only?
- Which Operations on the Source or Destination Database Affect the DRS Task Status?
- Why Cannot Standby Read Replicas on Some Other Clouds Be Used as the Source Database?
- Network and Security
- Permissions Management
-
Real-Time Migration
- When Can I Stop a Migration Task?
- How Do I Maintain the Original Service User Permission System After Definer Is Forcibly Converted During MySQL Migration?
- What Can I Do If the Invoking Permission Problem Occurs After the MySQL Stored Procedure Is Migrated to the Cloud?
- How Do I Ensure that All Services on the Database Are Stopped?
- What Can I Do When Message "can not get agency token" Is Displayed in the Migration Log
- What Can I Do If MyISAM Tables Are Not Supported by RDS for MySQL?
- What Are the Precautions for Migrating Data from an Earlier Version MySQL to MySQL 8.0?
- How Do I Export and Import Events and Triggers in Batches?
- How Can I Migrate Databases or Tables Whose Names Contain Uppercase Letters?
- What Can I Do If There Is an Extra Backslash (\) After a MySQL Account Is Migrated?
-
Real-Time Synchronization
- Can DRS Sync Tables of Different Schemas to the Same Schema?
- Can Online DDL Tools Be Used for Real-time Synchronization?
- Why Do I Use the SCAN IP Address to Connect to an Oracle RAC Cluster?
- How Do I Check Supplemental Logging of the Source Oracle Database?
- Garbled Characters or Synchronization Failure Due to Incompatible Character Sets
- How Do I Specify the Start Point for DRS Incremental Synchronization?
-
Real-Time Disaster Recovery
- What Are RPO and RTO of DRS Disaster Recovery?
- How Do I Select Active Database 1 and 2 for Dual-Active DR?
- What Is the Meaning of Forward and Backward Subtasks in Dual-Active Disaster Recovery?
- Common Exceptions in Real-Time Disaster Recovery
- Is a Primary/Standby Switchover Triggered Automatically or Manually for DR Tasks?
- Can Real-Time DR Be Performed for Specified Databases?
- Why Does a Real-Time DR Task Not Support Triggers and Events?
- Data-Level Comparison
-
General Operations
- What Can I Do When Information Overlaps on the DRS Console?
- Is the Destination Instance Set to Read-only or Read/Write?
- How Do I Set Global binlog_format=ROW to Take Effect Immediately?
- How Do I Set binlog_row_image=FULL to Take Effect Immediately?
- How Do I Change the Destination Database Password to Meet the Password Policy?
- Does Bandwidth Expansion Affect the Running DRS Tasks?
- Why Data in MariaDB and SysDB Cannot Be Migrated?
- Constraints and Operation Suggestions on Many-to-One Scenario
- Where Can I View DRS Operation Logs?
- Can a Completed Task Be Restarted?
- What Are the Differences Between Resetting a Task and Recreating a Task?
- What Do I Do After Changing the Password of the Source or Destination Database?
- What Can I Do If a DRS Task Times Out Due to Too Many Tables?
- Can I Change the Source or Destination Database After a DRS Task Is Created?
- Delay
-
Product Consulting
-
Troubleshooting
-
Solutions to Failed Check Items
- Disk Space
-
Database Parameters
- Checking Whether the Source Database Binlog Is Enabled
- Checking Whether the Source Database Binlog Is Row-Based
- Checking Whether the Binlog Retention Period Is Set on the Source Database
- Checking Whether the Source and Destination Database Character Sets Are Consistent
- Checking Whether the Source Database server_id Meets the Incremental Migration Requirements
- Checking Whether the Source and Destination Database Table Names Are Consistent in Case Sensitivity
- Checking Whether the Source Database Contains Object Names with Non-ASCII Characters
- Checking Whether the TIME_ZONE Values of the Source and Destination Databases Are the Same
- Checking Whether the COLLATION_SERVER Values of the Source and Destination Databases Are the Same
- Checking Whether the SERVER_UUID Values of the Source and Destination Databases Are the Same
- Checking Whether the SERVER_ID Values of the Source and Destination Databases Are Different
- Checking Whether the Source Database Contains Invalid sql_mode Values
- Checking Whether the sql_mode Values of the Source and Destination Databases Are the Same
- Checking Whether the sql_mode Value in the Destination Database Is Not no_engine
- Checking Whether the innodb_strict_mode Values of the Source and Destination Databases Are the Same
- Checking Whether the max_wal_senders Value of the Source Database Is Correctly Configured
- Checking Whether the WAL_LEVEL Value in the Source Database Is Correct
- Checking Whether the MAX_REPLICATION_SLOTS Value in the Source Database Is Correct
- Checking Whether the Source Database Is on Standby
- Checking Whether the log_slave_updates Value of the Source Database Is Correctly Configured
- Checking Whether the BLOCK_SIZE Value of the Source Database Is the Same as That of the Destination Database
- Checking Whether the binlog_row_image Value is FULL
- Checking Whether the Transaction Isolation Levels are Consistent
- Checking Whether the lc_monetary Values of the Source and Destination Databases Are the Same
- Checking Whether the Source Database Contains Trigger Names with Non-ASCII Characters
- Checking Whether log_bin_trust_function_creators Is Set to On in Both the Source and Destination Databases
- Checking Whether log_bin_trust_function_creators Is Set to On in the Destination Database
- Checking Whether the max_allowed_packet Value of the Destination Database Is too Small
- Checking Whether the Source Database User Has the Permission to Parse Logs
- Checking Whether the Databases and Tables Exist
- Checking Whether the Supplemental Log Level of the Source Database Meets Requirements
- Checking Whether session_replication_role of the Destination Database Is correctly Set
- Checking the Physical Standby Database
- Checking Whether the Values of group_concat_max_len Are Consistent
- Checking Whether the Character Sets Are Compatible
- Checking Replication Attribute of Primary Key Columns
- Checking Whether the Source and Destination Database Character Sets Are Consistent
- Whether the Selected Table Contains Delay Constraints
- Whether the Source Database Tables Contain Primary Keys
- Whether the Source Table Structure Contains Newline Characters
- Whether There Are Tables Containing Fields of the bytea or text Type in the Synchronization Object
- Whether the max_allowed_packet Value of the Source Database Is Too Small
- block_encryption_mode Consistency Check
- Character Type and Sorting Rule Check in the Destination Database
- Destination DB Instance Statuses
- Database User Permissions
- Database Versions
- Networks
-
Database Objects
- Checking Whether the Source Database Contains a MyISAM Table
- Checking Whether the Source Database Contains the Functions or Stored Procedures that the Source Database User Is Not Authorized to Migrate
- Checking Whether the Source Database Tables Use Storage Engines Not Supported by the Destination Database
- Checking Whether the Source Database Tables Contain Primary Keys
- Checking Whether the Source Database Contains Triggers or Events
- Database Configuration Items
- Conflicts
- SSL Connections
- Object Dependencies
-
Solutions to Failed Check Items
- Change History
-
User Guide (Paris Region)
- General Reference
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Constraints on DR Tasks
To ensure that data disaster recovery tasks run properly, DRS has certain constraints on different data flow scenarios.
Parent topic: Constraints
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