[jira] [Commented] (SOLR-13029) Allow HDFS backup/restore buffer size to be configured

classic Classic list List threaded Threaded
1 message Options
Reply | Threaded
Open this post in threaded view
|

[jira] [Commented] (SOLR-13029) Allow HDFS backup/restore buffer size to be configured

JIRA jira@apache.org

    [ https://issues.apache.org/jira/browse/SOLR-13029?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16749806#comment-16749806 ]

Tim Owen commented on SOLR-13029:
---------------------------------

hah, I wasn't suggesting automating that.. just how I manually tested it.

I've attached a newer patch, containing some unit tests for the various situations

> Allow HDFS backup/restore 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, 8.0
>            Reporter: Tim Owen
>            Priority: Major
>         Attachments: SOLR-13029.patch, 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.



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)

---------------------------------------------------------------------
To unsubscribe, e-mail: [hidden email]
For additional commands, e-mail: [hidden email]