Hi BookKeepers, during implementation of BP-14 I am facing a problem so I am asking for suggestions.
My need is to be able to know the list of all entries stored on a LedgerStorage given a ledgerId. Scanning from 0 to LedgerStorage#getLastAddConfirmed() does not seem to work because we have to deal with WriteAdvHandle, so there can be temporary "gaps" in the sequence of entries. I can have a writer which writes entries 0,1,5,6,7. Its LAC will be at most 1 as entries 2,3,4 are not written yet. I need on the bookie to able to know that entries 0, 1, 5, 6, 7 are stored on LedgerStorage. I cannot issue a scan from 0 to Long.MAX_VALUE, my current 'solution' it to make the client (writer) send the 'maximum entry id' and perform a scan from 0 to maxEntryId. In the example the writer will send a forceLedger RPC with maxEntryId = 7. This is need only for recoveries are bookie restart because I have to reconstruct the knowledge about which entries have been persisted durably on the Bookie. I am not very expert about LedgerStorage implementations, and I don't know if it would be feasible to have such 'scan all entries' method. This is the code I am talking about https://github.com/apache/bookkeeper/pull/1317/files#diff-3b81b1c90d1f51017627b3c032676168R1210 Any help is really appreciated Enrico
