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Constraints and Operation Suggestions on One-to-Many Scenario
Updated on 2024-03-27 GMT+08:00
Constraints and Operation Suggestions on One-to-Many Scenario
DRS supports one-to-many scenarios during migration or synchronization to suit your service requirements.
Operation Suggestions
- In the one-to-many scenario, multiple DRS tasks are required. The workload on the source database is multiplied. To prevent the pressure caused by multiple DRS tasks on the same source database from affecting services on the source database, you need to analyze the load of the source database in advance. If the source database is heavily loaded, you are advised to reduce the number of synchronization tasks.
- You are advised to create tasks one by one in the one-to-many scenario.
One-to-Many Real-Time Synchronization at the Instance Level
You need to create multiple synchronization tasks to implement one-to-many real-time synchronization. For example, to synchronize data from instance A to instances B, C, and D, you need to create three synchronization tasks.
Flowchart
When creating a task, ensure that the second task is created after the first task has entered the full phase. For details, see Overview
Figure 1 Flowchart
Parent topic: General Operations
General Operations FAQs
- 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?
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