This section describes the kernel version updates of DDM.
Table 1 Kernel version description
|
Version |
Description |
|
3.1.2.0 |
New features
- Improve the troubleshooting capability of the connection pool, and add the fail-fast feature (disabled by default) for data nodes.
- Improve data verification of shard configuration.
- Optimize memory configuration.
- Support the ANALYZE TABLE statement.
- Rebuild global secondary index for whitelisted users.
|
|
3.1.1 |
New features
- Support global secondary index for whitelisted users.
- Support SSL encrypted connection.
|
|
3.1.0 |
New features
- Add filter criteria for Show Processlist and Kill Sessionid.
- Add keywords related to MySQL 8.0 Online DDL.
Resolved issues
- Fixed the issue that the millisecond value is lost when UPDATE statements are executed using the DATE_SUB function.
- Optimized the display of field aliases in some complex queries.
- Fixed the issue that new tables cannot be used when rename operations are performed after other DDL operations.
- Fixed the error occurred when sequences are concurrently inserted.
|
|
3.0.9 |
New features
- Support the query for auto-increment progress of a sequence.
- Support the query for a record whose size exceeds 16 MB.
- Support MariaDB Connector/J.
- Optimize transaction splitting. If there are no updates in a transaction, requests are routed to the primary instance or a read replica based on read/write weights.
|
|
3.0.8 |
New features
- Support route calculation of ROW expressions.
- Support table recycle bins.
- Support metadata backup and restoration.
Resolved issues
- Optimized the DDM MetaDB connection pool.
- Optimized the DDM process monitoring mechanism.
- Optimized the display of Show Processlist.
- Optimized the process of Reload for obtaining metadata.
- Optimized the process for reporting an error when a transaction rollback occurs during incremental playback.
|
|
3.0.6 |
New features
- Allow users to connect to metadata using connection pools during shard change.
Resolved issues
- Fixed the issue that the end status of a DDL command being executed cannot be recorded when Ctrl+C is pressed.
- Optimized the high CPU usage when a process is killed during big data query on the client.
|
|
3.0.4 |
Resolved issues
- Fixed the error of read/write splitting in some abnormal scenarios.
- Optimized the execution of the GROUP_CONCAT function when there are a large amount of data.
|
