[GitHub] [bookkeeper] hangc0276 commented on pull request #4069: Parallel checkpoint when dbledgerStorage config multi ledgerStorageDir

["hangc0276 (via GitHub)" <gi...@apache.org>]

hangc0276 commented on PR #4069:
URL: https://github.com/apache/bookkeeper/pull/4069#issuecomment-1704529904

   >after we changed to multi ledgerStorageDir, the SyncThread will become bottleneck
   
   @lifepuzzlefun Could you provide more detail about the SyncThread bottleneck?
   Checkpoint will triggered in two ways:
   - Triggered by addEntry in SingleDirectoryDbLedgerStorage, which is executed by the thread in SingleDirectoryDbLedgerStorage
   - Triggered by SyncThread every 60s by default
   
   When high throughput writes in to bookie, the SyncThread won't be the bottleneck for the throughput because the checkpoint will be triggered by the thread in SingleDirectoryDbLedgerStorage


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