reddycharan commented on issue #570: Multiple active entrylogs URL: https://github.com/apache/bookkeeper/issues/570#issuecomment-368185000 For this work item, there are two possible approaches 1) is to have configurable number of active entrylogs per ledgerdir 2) active entrylog per ledger For the first approach I mentioned the design overview earlier. But we decided to go with the second approach for the following reasons There are couple of major benefits by going with entrylogperledger. The implementation would become simpler, because it is a complex logic to handle and maintain slotmap in configured number of Entrylogs per LedgerDir design/implementation and it needs to be thoroughly analyzed/tested from multi-thread perspective. But most importantly the garbagecollection component becomes much simpler because there is no need of compaction in entrylog per ledger approach. So there is huge gain in indirect performance because of absence of IO activity for compaction and huge improvement in space reclamation during compaction.
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