[GitHub] [pulsar] MarvinCai commented on issue #9271: topic retention not work

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MarvinCai commented on issue #9271:
URL: https://github.com/apache/pulsar/issues/9271#issuecomment-767744226


   @sijie please correct me if I'm wrong
   @lichuan6  ManagedLedger consists of  many BookKeeper ledgers, there'll be a current ledger that we write to. If curent ledger is closed or full a new ledger will be created and become the current ledger. There's a caveat that ledger trimming is performed on ledger level, e.g. it removes a whole ledger, and it **won't delete current ledger.** So in your case even if ledger retention is set to 10M and ledger size has exceeded, but it's the current ledger so it won't be removed. I think if you set `managedLedgerMaxSizePerLedgerMbytes` to lower value and produce messages to make topic write to a new ledger, you can observe the old ledger being deleted due to exceeded retention size limit.


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