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https://issues.apache.org/jira/browse/BOOKKEEPER-887?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matteo Merli resolved BOOKKEEPER-887.
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Resolution: Duplicate
> Allow to use multiple bookie journals
> -------------------------------------
>
> Key: BOOKKEEPER-887
> URL: https://issues.apache.org/jira/browse/BOOKKEEPER-887
> Project: Bookkeeper
> Issue Type: Improvement
> Reporter: Matteo Merli
> Assignee: Matteo Merli
> Fix For: 4.5.0
>
>
> Using multiple independent journals in the bookie can improve the bookie
> throughput and write latencies.
> When using HDDs for the journal, the writes and fsyncs can be spread across
> multiple discs (or RAID groups) on different filesystem mount points.
> If the journal is writing to an SSD, having multiple journal threads writing
> to the same disc will let the bookie to better utilize the disk write
> bandwidth.
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