[Gluster-users] Performance

Vikas Gorur vikas at gluster.com
Wed Aug 12 15:31:37 UTC 2009

----- "Hiren Joshi" <josh at moonfruit.com> wrote:

> Hello all,
> I have 2 servers both exporting 36 partitions. The client mirrors the
> 36 partitions on each server and puts them all into a DHT.
> dd if=/dev/zero of=/home/webspace_glust/zeros bs=1024 count=1024000
> Takes 8 minutes, compared to 30 seconds vi NFS, now granted I'm using
> mostly default settings but a transfer rate of 2.1Mb/s vs about
> 40Mb/s seems low.
> What am I doing wrong? Where should I start with the performance
> tuning?

a) Use a bigger block size. 1k is too small to get decent performance.
We suggest using atleast 128k.

b) Make sure you have the write-behind translator loaded on the client
side, with a cache-size set to atleast 1MB.

Engineer - http://gluster.com/

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