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Duo Zhang commented on HBASE-21246: ----------------------------------- So maybe another problem is that, where do we need the WALIdentity outside the WAL system? For regionserver, it only needs the WAL instance? And for replaying recover edits for a region, I think our decision is to provide a method in the WAL system API to get a stream of the recovered edits for a region? FWIW, I do not think the upper layer needs to know whether we have multiple wal files, or multiple topics or something other such things... > Introduce WALIdentity interface > ------------------------------- > > Key: HBASE-21246 > URL: https://issues.apache.org/jira/browse/HBASE-21246 > Project: HBase > Issue Type: Sub-task > Reporter: Ted Yu > Assignee: Ted Yu > Priority: Major > Fix For: HBASE-20952 > > Attachments: 21246.003.patch, 21246.HBASE-20952.001.patch, > 21246.HBASE-20952.002.patch, 21246.HBASE-20952.004.patch, > 21246.HBASE-20952.005.patch > > > We are introducing WALIdentity interface so that the WAL representation can > be decoupled from distributed filesystem. > The interface provides getName method whose return value can represent > filename in distributed filesystem environment or, the name of the stream > when the WAL is backed by log stream. -- This message was sent by Atlassian JIRA (v7.6.3#76005)