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Cloud Data Migration
Cloud Data Migration
- What's New
- Function Overview
- Service Overview
- Getting Started
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User Guide
- Permissions Management
- Supported Data Sources
- Creating and Managing a CDM Cluster
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Creating a Link in a CDM Cluster
- Creating a Link Between CDM and a Data Source
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Configuring Link Parameters
- OBS Link Parameters
- PostgreSQL/SQLServer Link Parameters
- GaussDB(DWS) Link Parameters
- RDS for MySQL/MySQL Database Link Parameters
- Oracle Database Link Parameters
- DLI Link Parameters
- Hive Link Parameters
- HBase Link Parameters
- HDFS Link Parameters
- FTP/SFTP Link Parameters
- Redis Link Parameters
- DDS Link Parameters
- CloudTable Link Parameters
- MongoDB Link Parameters
- Cassandra Link Parameters
- DIS Link Parameters
- Kafka Link Parameters
- DMS Kafka Link Parameters
- CSS Link Parameters
- Elasticsearch Link Parameters
- Dameng Database Link Parameters
- SAP HANA Link Parameters
- Shard Link Parameters
- MRS Hudi Link Parameters
- MRS ClickHouse Link Parameters
- ShenTong Database Link Parameters
- LogHub (SLS) Link Parameters
- Doris Link Parameters
- YASHAN Link Parameters
- Uploading a CDM Link Driver
- Creating a Hadoop Cluster Configuration
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Creating a Job in a CDM Cluster
- Table/File Migration Jobs
- Creating an Entire Database Migration Job
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Configuring CDM Source Job Parameters
- From OBS
- From HDFS
- From HBase/CloudTable
- From Hive
- From DLI
- From FTP/SFTP
- From HTTP
- From PostgreSQL/SQL Server
- From DWS
- From SAP HANA
- From MySQL
- From Oracle
- From a Database Shard
- From MongoDB/DDS
- From Redis
- From DIS
- From Kafka/DMS Kafka
- From Elasticsearch or CSS
- From MRS Hudi
- From MRS ClickHouse
- From a Dameng Database
- From LogHub (SLS)
- From a ShenTong Database
- From Doris
- From YASHAN
- Configuring CDM Destination Job Parameters
- Configuring CDM Job Field Mapping
- Configuring a Scheduled CDM Job
- Managing CDM Job Configuration
- Managing a CDM Job
- Managing CDM Jobs
- Viewing Traces
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Key Operation Guide
- Incremental Migration
- Using Macro Variables of Date and Time
- Migration in Transaction Mode
- Encryption and Decryption During File Migration
- MD5 Verification
- Configuring Field Converters
- Adding Fields
- Migrating Files with Specified Names
- Regular Expressions for Separating Semi-structured Text
- Recording the Time When Data Is Written to the Database
- File Formats
- Converting Unsupported Data Types
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Tutorials
- Creating an MRS Hive Link
- Creating a MySQL Link
- Migrating Data from MySQL to MRS Hive
- Migrating Data from MySQL to OBS
- Migrating Data from MySQL to DWS
- Migrating an Entire MySQL Database to RDS
- Migrating Data from Oracle to CSS
- Migrating Data from Oracle to DWS
- Migrating Data from OBS to CSS
- Migrating Data from OBS to DLI
- Migrating Data from MRS HDFS to OBS
- Migrating the Entire Elasticsearch Database to CSS
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Best Practices
-
Tutorials
- Creating an MRS Hive Link
- Creating a MySQL Link
- Migrating Data from MySQL to MRS Hive
- Migrating Data from MySQL to OBS
- Migrating Data from MySQL to DWS
- Migrating an Entire MySQL Database to RDS
- Migrating Data from Oracle to CSS
- Migrating Data from Oracle to DWS
- Migrating Data from OBS to CSS
- Migrating Data from OBS to DLI
- Migrating Data from MRS HDFS to OBS
- Migrating the Entire Elasticsearch Database to CSS
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Advanced Data Migration Guidance
- Incremental Migration
- Using Macro Variables of Date and Time
- Migration in Transaction Mode
- Encryption and Decryption During File Migration
- MD5 Verification
- Configuring Field Converters
- Migrating Files with Specified Names
- Regular Expressions for Separating Semi-structured Text
- Recording the Time When Data Is Written to the Database
- File Formats
- Scheduling a CDM Job by Transferring Parameters Using DataArts Factory
- Enabling Incremental Data Migration Through DataArts Factory
- Creating Table Migration Jobs in Batches Using CDM Nodes
- Simplified Migration of Trade Data to the Cloud and Analysis
- Migration of IoV Big Data to the Lake Without Loss
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Tutorials
- Performance White Paper
- Security White Paper
-
API Reference
- Before You Start
- API Overview
- Calling APIs
- Application Example
-
API
-
Cluster Management
- Querying Cluster Details
- Deleting a Cluster
- Querying All AZs
- Querying Supported Versions
- Querying Version Specifications
- Querying Details About a Flavor
- Querying the Enterprise Project IDs of All Clusters
- Querying the Enterprise Project ID of a Specified Cluster
- Query a Specified Instance in a Cluster
- Modifying a Cluster
- Restarting a Cluster
- Starting a Cluster
- Stopping a Cluster (To Be Taken Offline)
- Creating a Cluster
- Querying the Cluster List
- Job Management
- Link Management
-
Cluster Management
- Public Data Structures
- Permissions Policies and Supported Actions
- Appendix
-
FAQs
-
General
- What Are the Differences Between CDM and Other Data Migration Services?
- What Are the Advantages of CDM?
- What Are the Security Protection Mechanisms of CDM?
- How Do I Reduce the Cost of Using CDM?
- Will I Be Billed If My CDM Cluster Does Not Use the Data Transmission Function?
- Why Am I Billed Pay per Use When I Have Purchased a Yearly/Monthly CDM Incremental Package?
- How Do I Check the Remaining Validity Period of a Package?
- Will My Data Be Retained If My Package Expires or My Pay-per-Use Resources Are in Arrears?
- Can CDM Be Shared by Different Tenants?
- Can I Upgrade a CDM Cluster?
- How Is the Migration Performance of CDM?
- What Is the Number of Concurrent Jobs for Different CDM Cluster Versions?
- Can I Stop a CDM Cluster?
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Functions
- Does CDM Support Incremental Data Migration?
- Does CDM Support Field Conversion?
- What Component Versions Are Recommended for Migrating Hadoop Data Sources?
- What Data Formats Are Supported When the Data Source Is Hive?
- Can I Synchronize Jobs to Other Clusters?
- Can I Create Jobs in Batches?
- Can I Schedule Jobs in Batches?
- How Do I Back Up CDM Jobs?
- What Should I Do If Only Some Nodes in a HANA Cluster Can Communicate with the CDM Cluster?
- How Do I Use Java to Invoke CDM RESTful APIs to Create Data Migration Jobs?
- How Do I Connect the On-Premises Intranet or Third-Party Private Network to CDM?
- Does CDM Support Parameters or Variables?
- How Do I Set the Number of Concurrent Extractors for a CDM Migration Job?
- Does CDM Support Real-Time Migration of Dynamic Data?
- Can I Stop CDM Clusters?
- How Do I Obtain the Current Time Using an Expression?
- What Is the Time Format for the Where Clause Parameters for Creating a Migration Job?
- Can CDM Migrate Field Comments from a Source Table to a Destination Table?
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Troubleshooting
- What Should I Do If the Log Prompts that the Date Format Fails to Be Parsed?
- What Can I Do If the Map Field Tab Page Cannot Display All Columns?
- How Do I Select Distribution Columns When Using CDM to Migrate Data to GaussDB(DWS)?
- What Do I Do If the Error Message "value too long for type character varying" Is Displayed When I Migrate Data to DWS?
- What Can I Do If Error Message "Unable to execute the SQL statement" Is Displayed When I Import Data from OBS to SQL Server?
- What Should I Do If the Cluster List Is Empty, I Have No Access Permission, or My Operation Is Denied?
- Why Is Error ORA-01555 Reported During Migration from Oracle to DWS?
- What Should I Do If the MongoDB Connection Migration Fails?
- What Should I Do If a Hive Migration Job Is Suspended for a Long Period of Time?
- What Should I Do If an Error Is Reported Because the Field Type Mapping Does Not Match During Data Migration Using CDM?
- What Should I Do If a JDBC Connection Timeout Error Is Reported During MySQL Migration?
- What Should I Do If a CDM Migration Job Fails After a Link from Hive to GaussDB(DWS) Is Created?
- How Do I Use CDM to Export MySQL Data to an SQL File and Upload the File to an OBS Bucket?
- What Should I Do If CDM Fails to Migrate Data from OBS to DLI?
- What Should I Do If Error "Configuration Item [linkConfig.createBackendLinks] Does Not Exist" or "Configuration Item [throttlingConfig.concurrentSubJobs] Does Not Exist" Is Reported?
- What Should I Do If Message "CORE_0031:Connect time out. (Cdm.0523)" Is Displayed During the Creation of an MRS Hive Link?
- What Should I Do If Message "CDM Does Not Support Auto Creation of an Empty Table with No Column" Is Displayed When I Enable Auto Table Creation?
- What Should I Do If I Cannot Obtain the Schema Name When Creating an Oracle Relational Database Migration Job?
- What Should I Do If invalid input syntax for integer: "true" Is Displayed During MySQL Database Migration?
- What Should I Do If the Migration Source Is Oracle and Error Message "snapshot too old" Is Displayed?
- What Should I Do If Error "Identifier name is too long" Is Reported During Entire DB Migration to Hive?
- What Should I Do If Data Is Lost During Migration to DLI?
- What Should I Do If the Oracle Link Connectivity Test Is Successful on the Link Creation Page but Fails on the Links Page?
- What Should I Do If Destination Fields Are Not Displayed When Auto Table Creation Is Enabled in the Destination Job Configuration?
- What Should I Do If a Job Exported from a Cluster Fails to Be Imported to Another Cluster?
- What Should I Do If an Error Message Is Displayed Indicating that the Block Is Missing During HDFS File Migration?
- What Should I Do If the CDM Job Management Page Cannot Be Accessed and a Message Is Displayed Indicating that the Network or Server Cannot Be Accessed?
- What Should I Do If a CDM Cluster of Version 2.8.6 Fails to Migrate Data from OBS to DLI?
- What Should I Do If Error Message "Read timed out" Is Displayed During DWS Data Migration?
- What Should I Do If No Database or Table Information Can Be Obtained Through a Hive Link?
- What Should I Do If Error "get filesystem" Is Reported During the Creation of a FusionInsight HDFS Link?
- What Should I Do If Error "Invoke DLI service api failed" Is Reported When the Data Migration from MySQL to DLI Is About to Complete?
- What Should I Do If a MongoDB Field Fails to Be Migrated to the Destination?
- What Should I Do If a Field Is Escaped and Contains a Backslash (\) During the Migration of a DLI Foreign Table (OBS File) to DWS?
- What Should I Do If "Error occurs during loader run" Is Reported During Migration from PostgreSQL to Hive?
- What Should I Do If Error Message "Lost connection to MySQL server during query" Is Displayed During Migration from MySQL to DWS?
- What Should I Do If Error Message "For input string: "false" Is Displayed During Field Type Conversion During MySQL-to-DLI Migration?
- What Should I Do If an Error Occurs During the Migration of TINYINT Data from MySQL to DWS?
- What Should I Do If the Data Volume Is Inconsistent Before and After Data Migration?
- What Should I Do If an Error Is Reported Indicating an Incorrect Username or Password During Link Creation but They Are Correct Indeed?
- What Should I Do If a Message Is Displayed Indicating that the Fields in the Lower Camel Case Do Not Exist During Data Migration from a Database to OBS?
- What Should I Do If Error "invalid utf-8 character string" Is Reported When CSV Data Is Inserted into the MySQL Database?
- What Should I Do If a Scheduled Job Fails and Link Connectivity Is Abnormal?
- What Should I Do If CSV Data Fails to Be Inserted into a MySQL Database?
- What Should I Do If Error "timeout waiting for connection from pool" Is Reported During ES Writing?
- Why Is Error ORA-01555 Reported During Migration from Oracle to DWS?
- What Should I Do If the FTP Connectivity Test Fails and an Internal Server Error Is Reported?
- What Should I Do If All Users Except User root Cannot Access RDS for MySQL?
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General
- General Reference
Help Center/
Cloud Data Migration/
FAQs/
Functions/
Can CDM Migrate Field Comments from a Source Table to a Destination Table?
Copied.
Can CDM Migrate Field Comments from a Source Table to a Destination Table?
Symptom
Can CDM migrate field comments from a source table to a destination table?
Solution
It depends on the version.
Details are as follows:
This function is supported in the 2.8.6.1 and 2.9.2.1 versions, and not supported in the 2.9.1 version.
Parent topic: Functions
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