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https://issues.apache.org/jira/browse/GEODE-2994?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16026725#comment-16026725
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ASF GitHub Bot commented on GEODE-2994:
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GitHub user karensmolermiller opened a pull request:
https://github.com/apache/geode/pull/544
GEODE-2994 Take backups when region ops are quiescent
@upthewaterspout @joeymcallister @davebarnes97 @dihardman @ladyVader
@boglesby
Please review.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/karensmolermiller/geode feature/GEODE-2994
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/geode/pull/544.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #544
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commit 4affd0b7103b7b6630b38c63ba8c2e1b5f4bd1a0
Author: Karen Miller <[email protected]>
Date: 2017-05-26T17:29:29Z
GEODE-2994 Take backups when region ops are quiescent
----
> Doc task: interactions of backups with persistence
> --------------------------------------------------
>
> Key: GEODE-2994
> URL: https://issues.apache.org/jira/browse/GEODE-2994
> Project: Geode
> Issue Type: Improvement
> Components: docs
> Reporter: Karen Smoler Miller
> Assignee: Karen Smoler Miller
>
> Document that an inconsistent state can occur by using a backup to restore
> system state, if the backup is made at the wrong time.
> There are 2 examples where persistence and taking a backup might cause an
> inconsistency with region data, if that backup is used to restore a system.
> # *A Lucene index.* The Lucene index is persistent. If a backup is unlucky
> enough to be taken between a persisted write to a region (disk op) and a
> persisted write to the Lucene index (disk op), then the backup represents
> inconsistent data in the region and Lucene index.
> # *An AEQ.* The AEQ is persistent. If a backup is unlucky enough to be taken
> between a persisted write to a region (disk op) and a persisted write to the
> AEQ (disk op), then the backup represents inconsistent data in the region and
> the AEQ.
> The solution is to make sure that backups are taken when the system is
> quiescent WRT region operations.
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