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https://issues.apache.org/jira/browse/HBASE-21246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16713256#comment-16713256
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Ankit Singhal commented on HBASE-21246:
---------------------------------------

[~elserj]/[~reidchan], 
[HBASE-21246.master.001.patch|https://issues.apache.org/jira/secure/attachment/12951032/HBASE-21246.master.001.patch]
 includes changes only related to WalIdentity. (used master for pre-commit 
jenkin build as HBASE-20952 yet to be rebased)
Goal is to have WalIdentity to carry the name of the WAL(or the path of wal) 
across the framework instead of String/path but FS based implementations will 
still use the path internally.

> 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, 21246.20.txt, 21246.21.txt, 
> 21246.23.txt, 21246.24.txt, 21246.25.txt, 21246.26.txt, 21246.34.txt, 
> 21246.37.txt, 21246.39.txt, 21246.41.txt, 21246.43.txt, 
> 21246.HBASE-20952.001.patch, 21246.HBASE-20952.002.patch, 
> 21246.HBASE-20952.004.patch, 21246.HBASE-20952.005.patch, 
> 21246.HBASE-20952.007.patch, 21246.HBASE-20952.008.patch, 
> HBASE-21246.master.001.patch, replication-src-creates-wal-reader.jpg, 
> wal-factory-providers.png, wal-providers.png, wal-splitter-reader.jpg, 
> wal-splitter-writer.jpg
>
>
> 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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