[jira] [Comment Edited] (KAFKA-1646) Improve consumer read performance for Windows

["Honghai Chen (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-1646?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14578235#comment-14578235 ] 

Honghai Chen edited comment on KAFKA-1646 at 6/9/15 3:07 AM:
-------------------------------------------------------------

Merge to latest trunk, patch attached.

code review no change   https://reviews.apache.org/r/33204/diff/4/



was (Author: waldenchen):
Created reviewboard  against branch origin/trunk

> 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, KAFKA-1646_20150511_AddTestcases.patch, KAFKA-1646_20150609_MergeToLatestTrunk.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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