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Hadoop QA commented on SENTRY-2305: ----------------------------------- Here are the results of testing the latest attachment https://issues.apache.org/jira/secure/attachment/12946427/SENTRY-2305.007.patch against master. {color:red}Overall:{color} -1 due to an error {color:red}ERROR:{color} failed to apply patch (exit code 1): error: a/sentry-core/sentry-core-common/src/main/java/org/apache/sentry/service/common/ServiceConstants.java: does not exist in index error: a/sentry-service/sentry-service-server/src/main/java/org/apache/sentry/provider/db/service/persistent/SentryStore.java: does not exist in index error: a/sentry-service/sentry-service-server/src/test/java/org/apache/sentry/provider/db/service/persistent/TestHMSFollower.java: does not exist in index error: a/sentry-service/sentry-service-server/src/test/java/org/apache/sentry/provider/db/service/persistent/TestSentryStore.java: does not exist in index error: patch failed: sentry-service/sentry-service-server/src/main/java/org/apache/sentry/provider/db/service/persistent/SentryStore.java:114 Falling back to three-way merge... Applied patch to 'sentry-service/sentry-service-server/src/main/java/org/apache/sentry/provider/db/service/persistent/SentryStore.java' with conflicts. Going to apply patch with: git apply -p1 error: patch failed: sentry-service/sentry-service-server/src/main/java/org/apache/sentry/provider/db/service/persistent/SentryStore.java:114 Falling back to three-way merge... Applied patch to 'sentry-service/sentry-service-server/src/main/java/org/apache/sentry/provider/db/service/persistent/SentryStore.java' with conflicts. U sentry-service/sentry-service-server/src/main/java/org/apache/sentry/provider/db/service/persistent/SentryStore.java Console output: https://builds.apache.org/job/PreCommit-SENTRY-Build/4219/console This message is automatically generated. > Optimize time taken for persistence HMS snapshot by persisting in parallel > -------------------------------------------------------------------------- > > Key: SENTRY-2305 > URL: https://issues.apache.org/jira/browse/SENTRY-2305 > Project: Sentry > Issue Type: Sub-task > Components: Sentry > Affects Versions: 2.1.0 > Reporter: kalyan kumar kalvagadda > Assignee: kalyan kumar kalvagadda > Priority: Major > Attachments: SENTRY-2305.001.patch, SENTRY-2305.002.patch, > SENTRY-2305.003.patch, SENTRY-2305.004.patch, SENTRY-2305.005.patch, > SENTRY-2305.007.patch > > > There are couple of options > # Break the total snapshot into to batches and persist all of them in > parallel in different transactions. As sentry uses repeatable_read isolation > level we should be able to have parallel writes on the same table. This bring > an issue if there is a failure in persisting any of the batches. This > approach needs additional logic of cleaning the partially persisted snapshot. > I’m evaluating this option. > ** *Result:* Initial results are promising. Time to persist the snapshot came > down by 60%. > # Try disabling L1 Cache for persisting the snapshot. > # Try persisting the snapshot entries sequentially in separate transactions. > As transactions which commit huge data might take longer as they take a lot > of CPU cycles to keep the rollback log up to date. -- This message was sent by Atlassian JIRA (v7.6.3#76005)