[Gluster-devel] what am i missing here? (fast transfer only through 1 client)

[Amar S. Tumballi]

Can you share your client config? It surely looks strange.

On Thu, Feb 28, 2008 at 5:34 PM, billy cokalopolous <
billy.cokalopolous at gmail.com> wrote:

> Any help is greatly appreciated:
>
> server 1 - 1Gbps & identical hardware
> server 2 - 1Gbps & identical hardware
>
> both have identical client & server conf files w/ performance enhancement
> and afr
>
> the clients are run to mount to the same file path on both servers.
>
> now, scping a file from local file system on server1 to mounted gluster fs
> on server 2 transfers at ~3MB/s
> scping a file from local file system on server2 to mounted gluster fs on
> server1 transfers at ~23MB/s
> ALSO, scping to non-glusterfs yields ~23MB/s from server1 to server2 and
> vise versa, so something with gluster that is bottlenecking at 3MB/s
>
> If I change the afr section of the client files to list "subvolume brick1
> brick2" to "subvolume brick2 brick1", the transfer rates above switch -
> now
> server 1 to server 2 is fast and server 2 to server 1 is slow.
>
> volume afr
>  type cluster/afr
>  subvolumes brick1 brick2
> option self-heal on
> end-volume
> ------
> to
> ------
> volume afr
>  type cluster/afr
>  subvolumes brick2 brick1
> option self-heal on
> end-volume
>
> /var/lib/data is the mounted file system from glusterfs-client.vol
>
> billy at server1:/var/lib$ scp /tmp/2.mpg billy at server2:/var/lib/data/
> 2.mpg                                          14%   62MB   2.4MB/s
> 02:34
> ETA
>
> Now, the other way:
>
> billy at server2:/tmp$ sudo scp 3.mpg billy at server1:/var/lib/data/
> 3.mpg                                         100%   71MB  23.6MB/s
> 00:03
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>



-- 
Amar Tumballi
Gluster/GlusterFS Hacker
[bulde on #gluster/irc.gnu.org]
http://www.zresearch.com - Commoditizing Supercomputing and Superstorage!