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Limits

Last Updated：2023-06-25 03:29:51 Updated

This topic describes the limits of OceanBase Migration Service (OMS) Community Edition.

The following table describes the versions of OceanBase Community Edition and other databases that OMS Community Edition supports in data synchronization and data migration:

Category	Data migration	Data synchronization
OceanBase Community Edition	V3.1.0-CE, V3.1.1-CE, V3.1.2-CE, V3.1.3-CE, V3.1.4-CE and V4.0.0-CE Notice: At present, OceanBase Community Edition V4.0.0-CE can only be the destination of data migration from MySQL Database.	V3.1.0-CE, V3.1.1-CE, V3.1.2-CE, V3.1.3-CE, V3.1.4-CE
Other databases	MySQL: V5.5, V5.6, V5.7, and V8.0 MariaDB: V10.2 TiDB: V4.x、V5.x PostgreSQL: V10.x	Kafka: V0.9, V1.0, and V2.x RocketMQ: V4.7.1

OMS Community Edition supports OceanBase Cloud Platform (OCP) Community Edition V3.1.1-CE, V3.3.0-CE and V4.0.0-CE.
OMS Community Edition supports only the x86 architecture.

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OceanBase Migration Service

V4.0.0Community Edition

OMS Documentation
What's new
OMS Community Edition Introduction
- What is OMS Community Edition?
- Architecture
  - Overview
  - Hierarchical functional system
  - Basic components
- Limits
- Terms
Quick Start
- Data migration process
- Data synchronization process
Deploy OMS Community Edition
- Deployment type
- System and network requirements
- Memory and disk requirements
- Prepare the environment
- Deploy OMS Community Edition on a single node
- Deploy OMS Community Edition on multiple nodes in a single region
- Deploy OMS Community Edition on multiple nodes in multiple regions
- Scale-out and deployment
- Check the deployment
- Deploy a time-series database (Optional)
OMS Community Edition console
- Log on to the OMS console
- Overview
- User center
  - Configure user information
  - Change your logon password
  - Log off
Data migration
- Data migration overview
- Migrate data from a MySQL database to OceanBase Community Edition
- Migrate data from OceanBase Community Edition to a MySQL database
- Migrate data within OceanBase Community Edition
- Migrate data within OceanBase Community Edition in active-active disaster recovery scenarios
- Migrate data from a TiDB database to OceanBase Community Edition
- Migrate data from a PostgreSQL database to OceanBase Community Edition
- Manage data migration projects
  - View details of a data migration project
  - View and modify migration objects
  - Use tags to manage data migration projects
  - Download and import the settings of migration objects
  - Start, pause, and resume a data migration project
  - Release and delete a data migration project
- Schema migration mechanisms
- Supported DDL operations in incremental migration and limits
  - Supported DDL operations in incremental migration from a MySQL database to OceanBase Community Edition and limits
  - Supported DDL operations in incremental migration from OceanBase Community Edition to a MySQL database and limits
  - Supported DDL operations in incremental migration between MySQL tenants of OceanBase Database
- Configure matching rules for migration objects
Data synchronization
- Data synchronization overview
- Create a project to synchronize data from OceanBase Database Community Edition to a Kafka instance
- Create a project to synchronize data from OceanBase Database Community Edition to a RocketMQ instance
- Manage data synchronization projects
  - View details of a data synchronization project
  - View and modify synchronization objects
  - Use tags to manage data synchronization projects
  - Download and import the settings of synchronization objects
  - Start, pause, and resume a data synchronization project
  - Release and delete a data synchronization project
- Data formats
Create and manage data sources
- Create data sources
  - Create an OceanBase-CE data source
  - Create a MySQL data source
  - Create a TiDB data source
  - Create a Kafka data source
  - Create a RocketMQ data source
  - Create a PostgreSQL data source
- Manage data sources
  - View data source information
  - Copy a data source
  - Edit a data source
  - Delete a data source
- Create a database user
- User privileges
- Enable binlogs for the MySQL database
OPS & Monitoring
- O&M overview
- Go to the overview page
- Server
  - View server information
  - Update quotas
  - View server logs
- Components
  - Store
    - Create a store
    - View details of a store
    - Update the configurations of a store
    - Start and pause a store
    - Destroy a store
  - Connector
    - View details of a connector
    - Start and pause a connector
    - Migrate a connector
    - Update the configurations of a connector
    - Batch O\&M
    - Delete a connector
  - JDBCWriter
    - View details of a JDBCWriter
    - Start and pause a JDBCWriter
    - Migrate a JDBCWriter
    - Update the configurations of a JDBCWriter
    - Batch O\&M
    - Delete a JDBCWriter
  - Checker
    - View the information about a checker
    - Start and pause a checker
    - Rerun and reverify a checker
    - Update the configurations of a checker
    - Delete a checker
- O&M tickets
  - View details of an O\&M ticket
  - Skip a ticket or sub-ticket
  - Retry a ticket or sub-ticket
System management
- Permission Management
  - Overview
  - Manage users
  - Manage departments
- Alert center
  - View project alerts
  - View system alerts
  - Manage alert settings
- Associate with OCP
- System parameters
  - Modify system parameters
  - Modify HA configurations
OMS Community Edition O&M
- Manage OMS services
- OMS logs
- O&M operations for the Store component
- Store parameters
  - Parameters of a MySQL store
  - Parameters of an OceanBase store
- O&M operations for the Supervisor component
- Parameters of the Supervisor component
- O&M operations for the Connector component
- Connector parameters
  - Parameters of a destination RocketMQ instance
  - Parameters of a DataflowSink instance
  - Parameters in the destination Kafka instance
  - Parameters of the source database in full migration
  - Parameters of the source database in incremental data synchronization
  - Parameters for intermediate-layer synchronization
- Checker parameters
- JDBCWriter parameters
- Parameters of the CM component
Reference Guide
- API Reference
  - Obtain the status of a migration project
  - Obtain the status of a synchronization project
- OMS error codes
- Alert Reference
  - oms_host_down
  - oms_host_down_migrate_resource
  - oms_host_threshold
  - oms_migration_failed
  - oms_migration_delay
  - oms_sync_failed
  - oms_sync_status_inconsistent
  - oms_sync_delay
Upgrade Guide
- Overview
- Upgrade OMS in single-node deployment mode
- Upgrade OMS in multi-node deployment mode
- FAQ
FAQ
- General O&M
  - How do I modify the resource quotas of an OMS container?
  - How do I troubleshoot the OMS server down issue?
- Project diagnostics
  - What do I do when a store does not have data of the timestamp requested by the downstream?
  - What do I do when OceanBase Store failed to access an OceanBase cluster through RPC?
- OPS & monitoring
  - What are the alert rules?
- Data synchronization
  - FAQ about synchronization to a message queue
    - What are the strategies for ensuring the message order in incremental data synchronization to Kafka
- Data migration
  - Full migration
    - FAQ about full migration
      - How do I query the ID of a checker?
      - How do I query log files of the Checker component of OMS?
      - How do I query the verification result files of the Checker component of OMS?
      - What do I do if the destination table does not exist?
  - Incremental synchronization
    - How do I skip DDL statements?
    - How do I update the configurations of a JDBCWriter?
    - How do I start or stop a JDBCWriter?
    - How do I update whitelists and blacklists?
    - What are the application scope and limits of ETL?
- Installation and deployment
  - How do I download an image?
  - How do I upgrade Store?