dao-jun opened a new pull request, #22560:
URL: https://github.com/apache/pulsar/pull/22560

   ### Motivation
   
   In https://github.com/apache/pulsar/pull/19035 we introduced `skipCondition` 
to filter-out delay delivery messages before read entries from Bookkeeper, and 
in https://github.com/apache/pulsar/pull/21739, we also filter-out 
deleted(individual acked messages) before read entries.
   
   However, it will lead to one situation:  one single segment can be spit into 
segments. For example:
   entries to be filter-out: [3, 5, 7]
   entries to read: [1, 10]
   then, it will be split into: [[1,2],[4], [6], [8,10]].
   
   In the current implementation, after read [1,2] finished, then begin to read 
[4], after read [4] finished, then start to read [6]...
   It will lead to latency increasing, memory(allocated for entries) will also 
be retained for a longer period of time, and affect the throughput of the 
system. 
   
   ### Modifications
   
   <!-- Describe the modifications you've done. -->
   
   ### Verifying this change
   
   - [ ] Make sure that the change passes the CI checks.
   
   *(Please pick either of the following options)*
   
   This change is a trivial rework / code cleanup without any test coverage.
   
   *(or)*
   
   This change is already covered by existing tests, such as *(please describe 
tests)*.
   
   *(or)*
   
   This change added tests and can be verified as follows:
   
   *(example:)*
     - *Added integration tests for end-to-end deployment with large payloads 
(10MB)*
     - *Extended integration test for recovery after broker failure*
   
   ### Does this pull request potentially affect one of the following parts:
   
   <!-- DO NOT REMOVE THIS SECTION. CHECK THE PROPER BOX ONLY. -->
   
   *If the box was checked, please highlight the changes*
   
   - [ ] Dependencies (add or upgrade a dependency)
   - [ ] The public API
   - [ ] The schema
   - [ ] The default values of configurations
   - [ ] The threading model
   - [ ] The binary protocol
   - [ ] The REST endpoints
   - [ ] The admin CLI options
   - [ ] The metrics
   - [ ] Anything that affects deployment
   
   ### Documentation
   
   <!-- DO NOT REMOVE THIS SECTION. CHECK THE PROPER BOX ONLY. -->
   
   - [ ] `doc` <!-- Your PR contains doc changes. -->
   - [ ] `doc-required` <!-- Your PR changes impact docs and you will update 
later -->
   - [x] `doc-not-needed` <!-- Your PR changes do not impact docs -->
   - [ ] `doc-complete` <!-- Docs have been already added -->
   
   ### Matching PR in forked repository
   
   PR in forked repository: 
   


-- 
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.

To unsubscribe, e-mail: commits-unsubscr...@pulsar.apache.org

For queries about this service, please contact Infrastructure at:
us...@infra.apache.org

Reply via email to