[Gluster-users] AFR performance killer

Marko gluster at sopca.com
Wed Apr 15 08:58:50 UTC 2009

Hi Shehjar,

1.) Filesystem is default ext3 mounted with "defaults,noatime"
2.) I think it how it was becouse I always put io-threads as top(or near 
top) translator.  Iin TEST5 "iot" can be ignored.
3.) Server(brick) iscsi2 was also client on which I was running the test 
and it was also a Xen guest.

One more thing I'd like to point out. In documentation I miss 
information of best practices which translators should be put 
before/after other translators.
Example: should one put io-threads before or after io-cache? What does 
it mean if you configure either way.


Shehjar Tikoo wrote:
> Marko wrote:
>> this document is made for my personal reference so it's a little raw.
> A few questions:
> 1. What was the on-disk file system and the disk organization under the
> file system?
> 2. In the TEST5 volfile, the volume iot is dangling. Is that how it
> actually was during the test or was it interposed between volume wb and
> volume AFR?
>>> On Wed, Apr 8, 2009 at 6:18 PM, Marko <gluster at sopca.com 
>>> <mailto:gluster at sopca.com>> wrote:
>>> Hello,
>>> To clearify: * im testing with gluisterfs-2.0.0rc7 * all bricks are
>>> on same physical server(Xen guests). It's a testing environment.
> Were the client side tests( i.e., both the test program like
> make-many-files and the corresponding glusterfs client..) also running
> in a Xen guest?
> Thanks
> Shehjar

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