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https://issues.apache.org/jira/browse/HBASE-21246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16654491#comment-16654491
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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.
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