Vanlightly commented on pull request #2891:
URL: https://github.com/apache/bookkeeper/pull/2891#issuecomment-967014187


   Regarding garbage collection, retention is not determined by BookKeeper but 
whoever controls the ledger metadata (Pulsar for example). I don't think using 
a configured time period is the way to address this. The issue is that we try 
to store all metadata in memory, but given that each entry log has a ledger 
map, we can perform a scan process where we incrementally perform GC without 
all metadata in memory.


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