eolivelli opened a new pull request #529: WIP - BP-14 Volatile durability 
preview
URL: https://github.com/apache/bookkeeper/pull/529
 
 
   This is a preview of the work for BP-14
   https://cwiki.apache.org/confluence/display/BOOKKEEPER/BP-14+Relax+durability
   
   Please note that this work depends on BP-15 (PR #510) because we are going 
to use the new CreateLedger API.
   Temporary I have added a lot of overloaded versions of 
createLedger/createLedgerAdv but using the new API these new methods will not 
be added.
   
   I will try to split the patch in smaller tasks but I will appreciate if you 
have some cycle to start looking at how it will look like.
   
   Most notable changes:
   - introducing a LedgerType in ledger metadata
   - changes to wire protocol: optional LedgerType in AddRequest, changes in 
AddResponse, new protocol messages for the Sync API
   - changes to LederHandle#sendAddSuccessCallbacks (this is the main change to 
the LAC Protocol on the client-side)
   - for volatile durability ledgers LastAddConfirmed will advance only in case 
of an explicit "sync"
   - on the Bookie side introduction of SyncCounter on Journal to keep track of 
which entries have been really persisted durably
   - new LedgerHandle#sync API (this will be subject to change, it will follow 
the "new style" of BP-15 APIs)
   - on close() a sync() will not be performed automatically on volatile 
durability ledgers
   
   Additional notes:
   - The patch needs rebase
   - The patch needs a lot of additional testcases
   
 
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