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https://issues.apache.org/jira/browse/JAMES-3175?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17106242#comment-17106242
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Benoit Tellier commented on JAMES-3175:
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https://github.com/linagora/james-project/pull/3347 contributed the reindexing
unlocking a 5x improvment on our test plateform
> Mailbox reindexing should run faster
> ------------------------------------
>
> Key: JAMES-3175
> URL: https://issues.apache.org/jira/browse/JAMES-3175
> Project: James Server
> Issue Type: Improvement
> Components: elasticsearch, mailbox
> Affects Versions: 3.5.0
> Reporter: Benoit Tellier
> Priority: Major
> Labels: perf
>
> On one of Linagora owned plateform, reindexing of 500M emails is conducted
> at a speed of 11K email / hour.
> This means given our dataset 5 years to conduct the reindexing.
> We should speed that up.
> The reindexing is performed sequentially, without reactor, and we are paying
> a heavy price with all sorts of latencies, interaction is performed with 1
> store at a time (cassandra, elasticSearch, swift are involved), no
> parallelism is leveraged.
> All steps of reindexing should be done in a reactive fashion.
> Acceptance criteria: Performance improvment measured
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