Re: Performance results with exofs

[Boaz Harrosh <bharrosh@panasas.com>]

On 06/07/2010 06:24 PM, sfaibish wrote:
> Boaz,
> 
> You were mentioning some preliminary performance on NFS4.1 and pNFS during
> the pNFS call few weeks back. I thought you put them in an email but I  
> couldn't
> find that email. Could you re-send it to me or summarize the results in a  
> new
> email for comparison to the block layout performance. Bruce is also  
> interested
> so I CC him as well. Thanks
> 
> /Sorin
> 

I did not yet publish the Document. It's stuck behind my dis-talent for
writing and the pnfs bugs de jur.

Basically all machines:
- connected by a 1 GBit link.
- All clients doing a dd write of 8GB file from /dev/zero
- 3of8 is the special raid-groups arrangement of exofs && objlayout
  where out of 8 devices each file is striped over 3 devices in a
  round robin fashion. (*With a small dirty trick)

[single client]
1 - osds 40MB
2 - osds 80MB
4 - osds 114MB (saturation point of the 1 Gbit link)
8 - osds 114MB

[2 clients 8of8 osds]
226 MBs

[4 clients 8of8 osds]
263 MBs

[8 clients 8of8 osds]
252 MBs

[1 clients 3of8 osds]
114 MBs

[2 clients 3of8 osds *]
226 MBs

[4 clients 3of8 osds *]
417 MBs

[8 clients 3of8 osds]
405 MBs

Boaz