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Re: [Gluster-devel] speed tests with gls3 fuse and tla 441
From: |
Anand Avati |
Subject: |
Re: [Gluster-devel] speed tests with gls3 fuse and tla 441 |
Date: |
Thu, 9 Aug 2007 23:36:22 +0530 |
Harris/Nathan,
I am looking into the issue. the performance seems to be a problem for
small files (which get passed on in one write() call to the filesystem). The
actual delay seems to be coming from either VFS/fuse. When write-behind
replies back 'written' that fast, there seems to be some kind of 'idling'
before getting further calls from fuse. The write-behind definitely seems to
make a positive difference for large files though. I am investigating this
deeper currently.
avati
2007/8/8, Nathan Allen Stratton <address@hidden>:
>
> On Wed, 8 Aug 2007, Harris Landgarten wrote:
>
> > I just ran some speed tests with tla 441 and fuse-2.7.0-gls3
>
> I am running tla 439, but haveing the same issues with write-behind and
> read-ahead. We are only talking about 134M....
>
> TLA-439
> write-behind on
> read-ahead on
>
> address@hidden share]# time cp /usr/bin/* /share/test/
> real 2m24.436s
> address@hidden share]# time cp -r /share/test/ /share/test2
> real 3m14.409s
> address@hidden share]# time rm -fr test*
> real 0m47.418s
>
> TLA-439
> write-behind off
> read-ahead on
>
> address@hidden /]# time cp /usr/bin/* /share/test/
> real 1m51.529s
> address@hidden /]# time cp -r /share/test/ /share/test2
> real 2m52.947s
> address@hidden /]# time rm -fr test*
> real 0m59.132s
>
> TLA-439
> write-behind off
> read-ahead off
>
> address@hidden share]# time cp /usr/bin/* /share/test/
> real 1m45.248s
> address@hidden share]# time cp -r /share/test/ /share/test2
> real 2m28.788s
> address@hidden share]# time rm -fr /share/test*
> real 1m1.128s
>
>
>
> ><>
> Nathan Stratton CTO, Voila IP Communications
> nathan at robotics.net nathan at voilaip.com
> http://www.robotics.net http://www.voilaip.com
>
>
>
> _______________________________________________
> Gluster-devel mailing list
> address@hidden
> http://lists.nongnu.org/mailman/listinfo/gluster-devel
>
--
It always takes longer than you expect, even when you take into account
Hofstadter's Law.
-- Hofstadter's Law