[Gluster-users] increase write performance in gfs 3.5.2

[Peter P.]

Thank you. And what are the other two jobs ?
I have set the write-behind-window-size to 500 Mb and wrote a 100 Mb file,
but the speed is still the same.
Can you explain why ?

Regards

2015-02-09 13:20 GMT+01:00 Peter P. <peter.prusi at googlemail.com>:

> Thank you. And what are the other two jobs ?
> I have set the write-behind-window-size to 500 Mb and wrote a 100 Mb file,
> but the speed is still the same.
> Can you explain why ?
>
> Regards
> Peter
>
> 2015-02-08 12:04 GMT+01:00 Rafi K C <muhammedrafi13 at gmail.com>:
>
>> On Sat, 2015-02-07 at 20:41 +0100, Peter Prusi wrote:
>> > Hello,
>> >
>> > I'm new to glusterfs and I dont understand 'the
>> > performance.write-behind-window-size' option. I'm using glusterfs 3.5.2
>> > and setup a volume over two nodes connected over 1 GbE.
>> > Actually the write performance is about 58 Mb/s. This means glusterfs
>> > writes the data simultaneous on both nodes. I'm trying to increase the
>> > write speed and I thought this option would cache the data
>> > on one node and then distribute to the other. So i could double the
>> > speed. I played around with this option, but it has no effect to the
>> > write speed.
>>
>> Write-behind does three jobs with respect to a write-request. One among
>> them is,
>>
>> it will lie to application, which issued the write-request about the
>> completion of write and then will perform this write operation in
>> background. Basically, For a single inode, it will lie to the
>> application until current size of the total lied request which are not
>> fulfilled on nodes becomes equal to the window size. This size is
>> configurable through performance.write-behind-window-size .
>>
>>
>> > What am I doing wrong or
>> > is there another tweak to increase the write
>> > speed ?
>>
>> I'm not familiar with write performance tweaks. Some one more familiar
>> with this can comment on this.
>>
>>
>> Regards
>> Rafi KC
>> >
>> > Thank you
>> > _______________________________________________
>> > Gluster-users mailing list
>> > Gluster-users at gluster.org
>> > http://www.gluster.org/mailman/listinfo/gluster-users
>>
>>
>>
>
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