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ASF GitHub Bot commented on GEODE-2994: --------------------------------------- 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 ---- commit 4affd0b7103b7b6630b38c63ba8c2e1b5f4bd1a0 Author: Karen Miller <kmil...@pivotal.io> 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. -- This message was sent by Atlassian JIRA (v6.3.15#6346)