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https://issues.apache.org/jira/browse/HBASE-20952?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16558671#comment-16558671
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stack commented on HBASE-20952:
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Old request is reexamination of the WALEdit/WALKey entities because they are
fat objects that duplicate attributes. Would be sweet if these got a review as
part of this work (maybe its out of scope).
Also, lets aim for low friction (a 'soft' target, I know). There is too much
here as it is (needs digging). Recently I tried multiwal with the new asyncfs
expecting two WALs to go close to 2x the throughput or > 1.5 but no, its more
like 1.1 x the throughput.
Will multiwal be supported?
> Re-visit the WAL API
> --------------------
>
> Key: HBASE-20952
> URL: https://issues.apache.org/jira/browse/HBASE-20952
> Project: HBase
> Issue Type: Sub-task
> Components: wal
> Reporter: Josh Elser
> Priority: Major
>
> Take a step back from the current WAL implementations and think about what an
> HBase WAL API should look like. What are the primitive calls that we require
> to guarantee durability of writes with a high degree of performance?
> The API needs to take the current implementations into consideration. We
> should also have a mind for what is happening in the Ratis LogService (but
> the LogService should not dictate what HBase's WAL API looks like RATIS-272).
> The API may be "OK" (or OK in a part). We need to also consider other methods
> which were "bolted" on such as {{AbstractFSWAL}} and
> {{WALFileLengthProvider}}. Other corners of "WAL use" (like the
> {{WALSplitter}} should also be looked at to use WAL-APIs only).
> We also need to make sure that adequate interface audience and stability
> annotations are chosen.
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