[jira] [Resolved] (BOOKKEEPER-887) Allow to use multiple bookie journals

["Matteo Merli (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/BOOKKEEPER-887?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Matteo Merli resolved BOOKKEEPER-887.
-------------------------------------
    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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