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https://issues.apache.org/jira/browse/HBASE-8446?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13646447#comment-13646447
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Matteo Bertozzi commented on HBASE-8446:
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{quote}What does this comment say? Thread number can be >1.{quote}
yes, there's a thread pool that runs the snapshot task... so if you've 1 your
request are enqueued
{quote}What ensures that put doesn't replace the old value?{quote}
All the logic before, you get in there if there're no other snapshot/restore
running on the same table and the snapshot doesn't exists. you may replace the
old value if is in a finished state, that means finished but with an error. so
in this case you are starting another task to "take the same snapshot"
> Allow parallel snapshot of different tables
> -------------------------------------------
>
> Key: HBASE-8446
> URL: https://issues.apache.org/jira/browse/HBASE-8446
> Project: HBase
> Issue Type: Improvement
> Components: snapshots
> Affects Versions: 0.95.0
> Reporter: Matteo Bertozzi
> Assignee: Matteo Bertozzi
> Priority: Minor
> Fix For: 0.95.2
>
> Attachments: HBASE-8446-94.patch, HBASE-8446-v0.patch,
> HBASE-8446-v1.patch, HBASE-8446-v2.patch, HBASE-8446-v3.patch,
> HBASE-8446-v4.patch
>
>
> currently only one snapshot at the time is allowed.
> Like for the restore, we should allow taking snapshot of different tables in
> parallel.
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