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Posted to issues@hbase.apache.org by "Zheng Hu (JIRA)" <ji...@apache.org> on 2017/09/13 11:31:00 UTC
[jira] [Updated] (HBASE-18806) VerifyRep by snapshot need not to
restore snapshot for each mapper
[ https://issues.apache.org/jira/browse/HBASE-18806?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Zheng Hu updated HBASE-18806:
-----------------------------
Issue Type: Improvement (was: Bug)
> VerifyRep by snapshot need not to restore snapshot for each mapper
> ------------------------------------------------------------------
>
> Key: HBASE-18806
> URL: https://issues.apache.org/jira/browse/HBASE-18806
> Project: HBase
> Issue Type: Improvement
> Components: Replication
> Affects Versions: 2.0.0-alpha-2
> Reporter: Zheng Hu
> Assignee: Zheng Hu
>
> In following method stack, seems like each mapper task will restore the snapshot. If we verify replication by a snapshot which has many hfiles, then we will take long time to restore snapshot. In our cluster, we took ~30min for the snapshot restoring when verify a big table.
> {code}
> Verifier.map
> |--------> replicatedScanner = new TableSnapshotScanner(...)
> |--------> TableSnapshotScanner.init()
> |-----> RestoreSnapshotHelper.copySnapshotForScanner
> {code}
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