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Posted to commits@rocketmq.apache.org by "imzs (via GitHub)" <gi...@apache.org> on 2026/03/19 06:02:22 UTC

[I] [Enhancement] Support LMQ in CombineConsumeQueueStore without migration to RocksDB CQ [rocketmq]

imzs opened a new issue, #10173:
URL: https://github.com/apache/rocketmq/issues/10173

   ### Before Creating the Enhancement Request
   
   - [x] I have confirmed that this should be classified as an enhancement rather than a bug/feature.
   
   
   ### Summary
   
   Support LMQ in CombineConsumeQueueStore without requiring full migration to RocksDB CQ, clusters that need LMQ support no longer need to complete a full migration first.
   
   ### Motivation
   
   
   CombineConsumeQueueStore was originally designed as a transient migration bridge to help brokers smoothly transition from file-based ConsumeQueueStore to RocksDBConsumeQueueStore via dual-write. The intended final state was a complete cutover to RocksDB, which was a prerequisite for enabling LMQ support.
   
   
   This creates a hard dependency between LMQ capability and full RocksDB migration. Brokers in the dual-write transition state cannot support LMQ even though RocksDBConsumeQueueStore is already active, forcing operators to complete a potentially long migration before LMQ can be enabled.
   
   ### Describe the Solution You'd Like
   
   Enhance CombineConsumeQueueStore with topic-aware routing: LMQ topics are exclusively dispatched to and served from RocksDBConsumeQueueStore, while non-LMQ topics continue to follow the existing dual-write logic. This allows CombineConsumeQueueStore to serve as a stable long-term hybrid state.
   
   ### Describe Alternatives You've Considered
   
   .
   
   ### Additional Context
   
   No impact on existing behavior for non-LMQ topics.
   The original migration path to a pure-RocksDB final state is fully preserved.


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Re: [I] [Enhancement] Support LMQ in CombineConsumeQueueStore without migration to RocksDB CQ [rocketmq]

Posted by "imzs (via GitHub)" <gi...@apache.org>.
imzs commented on issue #10173:
URL: https://github.com/apache/rocketmq/issues/10173#issuecomment-4656530928

   Finished.


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Re: [I] [Enhancement] Support LMQ in CombineConsumeQueueStore without migration to RocksDB CQ [rocketmq]

Posted by "imzs (via GitHub)" <gi...@apache.org>.
imzs closed issue #10173: [Enhancement] Support LMQ in CombineConsumeQueueStore without migration to RocksDB CQ
URL: https://github.com/apache/rocketmq/issues/10173


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