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https://issues.apache.org/jira/browse/HBASE-26974?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Duo Zhang resolved HBASE-26974.
-------------------------------
Hadoop Flags: Reviewed
Resolution: Fixed
Pushed to master and branch-3.
Thanks [~frostruan]! And please fill the release note since we add a new Admin
method.
> Introduce a LogRollProcedure
> ----------------------------
>
> Key: HBASE-26974
> URL: https://issues.apache.org/jira/browse/HBASE-26974
> Project: HBase
> Issue Type: Improvement
> Components: backup&restore, proc-v2
> Reporter: ruanhui
> Assignee: ruanhui
> Priority: Minor
> Labels: pull-request-available
> Fix For: 3.0.0-beta-2
>
>
> The current log-rolling for all regionservers is based in ZK. Here is an
> attempt to reimplement it with procedure v2.
> Here are some requirements about the implementation.
> The procedure can be introduced as a new feature. It should remain fully
> compatible with previous implementations. Also, this feature can be disabled
> by the configuration. Currently we only use the logroll procedure when taking
> a backup job, so I think all code logic should be implemented in the
> hbase-backup module as much as possible(I'm not sure if this is the right way
> to do it. If you have any suggestions, please let me know).
> Here are some details about the implementation.
> *LogRollProcedure*
> The LogRollProcedure is used to roll WAL for all the regionservers in the
> cluster. It acquires the shared lock of the backup system table.
> *RSLogRollProcedure*
> The RSLogRollProcedure is used to schedule a RSLogRollRemoteProcedure for
> each regionserver. When the subprocedure returns, the RSLogRollProcedure will
> check the logrolling result in the backup system table. If failed, The
> RSLogRollProcedure will schedule a new RSLogRollRemoteProcedure to retry.
> *RSLogRollRemoteProcedure*
> The RSLogRollRemoteProcedure is used to send the log roll request to the
> remote server.
> This is only the first version implementation, any suggestions and feedbacks
> are appreciated.
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