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https://issues.apache.org/jira/browse/KAFKA-1646?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14359829#comment-14359829
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Jay Kreps commented on KAFKA-1646:
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Yeah I was proposing doing this across the board rather than just for windows.
I don't think it will help much on the better linux filesystems which do
delayed allocation anyway but it should help on the older filesystems. We'll
need to think this through carefully though as it changes what you would see if
you ls the files.
> Improve consumer read performance for Windows
> ---------------------------------------------
>
> Key: KAFKA-1646
> URL: https://issues.apache.org/jira/browse/KAFKA-1646
> Project: Kafka
> Issue Type: Improvement
> Components: log
> Affects Versions: 0.8.1.1
> Environment: Windows
> Reporter: xueqiang wang
> Assignee: xueqiang wang
> Labels: newbie, patch
> Attachments: Improve consumer read performance for Windows.patch,
> KAFKA-1646-truncate-off-trailing-zeros-on-broker-restart-if-bro.patch,
> KAFKA-1646_20141216_163008.patch, KAFKA-1646_20150306_005526.patch
>
>
> This patch is for Window platform only. In Windows platform, if there are
> more than one replicas writing to disk, the segment log files will not be
> consistent in disk and then consumer reading performance will be dropped down
> greatly. This fix allocates more disk spaces when rolling a new segment, and
> then it will improve the consumer reading performance in NTFS file system.
> This patch doesn't affect file allocation of other filesystems, for it only
> adds statements like 'if(Os.iswindow)' or adds methods used on Windows.
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