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https://issues.apache.org/jira/browse/HBASE-12439?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16388965#comment-16388965
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Chance Li commented on HBASE-12439:
-----------------------------------
[~stack]
thanks, sir.
{quote}less throughput, but way less CPU used (better 95th percentiles, etc),
and handlers free for other tasks\{quote}
Yes sir, this is our purpose.
{quote}Would it make sense to put this limit behind a configuration
gate?\{quote}
I think we need it. It is mainly for to enable us to 'remove' it , even though
we can't totally remove it because of the added counter on the path.
{quote}Also of note is how your compares show the asyncwal being slightly
better than old wal.\{quote}
Let me check again. And this async_wal is one of Durablilty types. it's not WAL.
[~carp84] ok, I will work on it.
> Procedure V2
> ------------
>
> Key: HBASE-12439
> URL: https://issues.apache.org/jira/browse/HBASE-12439
> Project: HBase
> Issue Type: New Feature
> Components: master
> Affects Versions: 2.0.0
> Reporter: Matteo Bertozzi
> Priority: Major
> Labels: reliability
> Attachments: ProcedureV2b.pdf, Procedurev2Notification-Bus.pdf,
> Procedurev2Notification-BusRoadmap.pdf
>
>
> Procedure v2 (aka Notification Bus) aims to provide a unified way to build:
> * multi-steps procedure with a rollback/rollforward ability in case of
> failure (e.g. create/delete table)
> ** HBASE-12070
> * notifications across multiple machines (e.g. ACLs/Labels/Quotas cache
> updates)
> ** Make sure that every machine has the grant/revoke/label
> ** Enforce "space limit" quota across the namespace
> ** HBASE-10295 eliminate permanent replication zk node
> * procedures across multiple machines (e.g. Snapshots)
> * coordinated long-running procedures (e.g. compactions, splits, ...)
> * Synchronous calls, with the ability to see the state/result in case of
> failure.
> ** HBASE-11608 sync split
> still work in progress/initial prototype: https://reviews.apache.org/r/27703/
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