Cloud Data Migration
Cloud Data Migration
- What's New
- Function Overview
- Service Overview
- Getting Started
-
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
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API
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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
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Cluster Management
- Public Data Structures
- Permissions Policies and Supported Actions
- Appendix
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FAQs
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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
On this page
Show all
Help Center/
Cloud Data Migration/
Best Practices/
Simplified Migration of Trade Data to the Cloud and Analysis/
Using CDM to Upload Data to OBS/
Uploading Inventory Data
Copied.
Uploading Inventory Data
- Use Direct Connect to establish a Direct Connect connection between the local data center and Huawei Cloud Virtual Private Cloud (VPC).
- Create an OBS bucket and record the access domain name, port number, access key ID (AK), and secret access key (SK) of the OBS bucket.
- Create a CDM cluster.
NOTE:
If a DataArts Studio instance includes a CDM cluster (except the trial version) and the cluster meets your requirements, you do not need to buy a DataArts Migration incremental package.
If you need to create another CDM cluster, buy a CDM incremental package by referring to Buying a CDM Incremental Package.
- Instance Type: Select cdm.xlarge, which applies to most migration scenarios.
- VPC: VPC of the CDM cluster. Select the VPC that connects to the local data center through Direct Connect.
- (Optional) Subnet and Security Group: You can configure either of them.
- After the cluster is created, choose Job Management > Link Management > Create Link. The page for selecting a link type is displayed. See Figure 1.
- To connect to the local Apache HDFS of company H, select Apache HDFS, and click Next.
Figure 2 Creating an HDFS link
NOTE:
- Name: Enter a custom link name, for example, hdfs_link.
- URI: Enter the NameNode URI of HDFS of company H.
- Authentication Method: Select KERBEROS if Hadoop is in security mode to obtain the principal and keytab files from the client for authentication.
- Principal and Keytab File: Obtain the principal account and keytab file from the Hadoop administrator.
- Click Save. CDM automatically checks whether the link is available.
- If the link is available, a message is displayed, indicating that the link is successfully saved, and the link management page is displayed.
- If the link is unavailable, check whether the link parameters are correctly configured or whether the firewall of company H allows the elastic IP address (EIP) of the CDM cluster to access the data source.
- Click Create Link to create an OBS link. On the page that is displayed, select Object Storage Service (OBS) and click Next. Set the OBS link parameters as required. See Figure 3.
NOTE:
- Name: Enter a custom link name, for example, obslink.
- OBS Endpoint: Enter the domain name or IP address of OBS, for example, obs.myhuaweicloud.com.
- Port: Enter the port number of OBS, for example, 443.
- OBS Bucket Type: Select a value from the drop-down list box as required.
- AK and SK: Enter the AK and SK used for accessing the OBS database. To obtain the AK and SK, log in to the management console, click the username in the upper right corner, and select My Credentials from the drop-down list. On the displayed page, choose Access Keys in the left navigation pane.
- Click Save. The Link Management page is displayed.
- Choose Table/File Migration > Create Job to create a job for migrating trade statistics of company H to OBS. See Figure 4.
NOTE:
- Job Name: Enter a user-defined job name.
- Source Link Configuration:
- Source Link Name: Select the HDFS link hdfs_link created in 5.
- Source Directory/File: Set this parameter to the local storage path of company H's trade statistics. The value can be either a directory or a file. Set this parameter to a directory. CDM migrates all files in the directory to OBS.
- File Format: Select Binary. The file format refers to the format used by CDM to transmit data. The formats of the original files are not changed. Binary is recommended for migration between files because the transmission efficiency and performance are optimal.
- Destination Link Configuration:
- Destination Link Name: Select the OBS link obslink created in 7.
- Bucket Name and Write Directory: Enter the path for storing trade statistics in OBS. CDM writes the files to this path.
- File Format: Select Binary. Similar to the source link, the formats of the original files are not changed.
- Duplicate File Processing Method: Select Skip. CDM determines that a file is a duplicate file only when the file name and file size are the same on the source and destination ends. In this case, CDM skips the file and does not migrate the file to OBS.
- Click Next to go to the tab page for configuring the task parameters. For the migration of inventory data, retain the default values of the parameters.
- Click Save and Run. On the displayed job management page, you can view the job execution progress and result.
- After the job is successfully executed, click Historical Record to view the number of written rows, number of read rows, number of written bytes, number of written files, and execution logs.
Parent topic: Using CDM to Upload Data to OBS
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