[jira] [Updated] (SOLR-13029) Allow HDFS buffer size to be configured

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[jira] [Updated] (SOLR-13029) Allow HDFS buffer size to be configured

JIRA jira@apache.org

     [ https://issues.apache.org/jira/browse/SOLR-13029?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tim Owen updated SOLR-13029:
----------------------------
    Attachment: SOLR-13029.patch

> Allow HDFS buffer size to be configured
> ---------------------------------------
>
>                 Key: SOLR-13029
>                 URL: https://issues.apache.org/jira/browse/SOLR-13029
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public)
>          Components: Backup/Restore, hdfs
>    Affects Versions: 7.5, master (8.0)
>            Reporter: Tim Owen
>            Priority: Major
>         Attachments: SOLR-13029.patch, SOLR-13029.patch
>
>
> There's a default hardcoded buffer size setting of 4096 in the HDFS code which means in particular that restoring a backup from HDFS takes a long time. Copying multi-GB files from HDFS using a buffer as small as 4096 bytes is very inefficient. We changed this in our local build used in production to 256kB and saw a 10x speed improvement when restoring a backup. Attached patch simply makes this size configurable using a command line setting, much like several other buffer size values.



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