[Dovecot] Dovecot imaptest on RHEL4/GFS1, RHEL6/GFS2, NFS and local storage results

[Ed W]

On 11/05/2011 00:00, Aliet Santiesteban Sifontes wrote:
> Using local storage(local hard driver ext4 filesystems)
> 
> 
> Totals:
> Logi List Stat Sele Fetc Fet2 Stor Dele Expu Appe Logo
> 100%  50%  50% 100% 100% 100%  50% 100% 100% 100% 100%
>                           30%                  5%
> 7798 3868 3889 7706 7566 10713 1080 6089 7559 7688 15562
> 7806 3879 3874 7716 7585 10873 1114 6018 7578 7696 15572
> 7866 3910 3855 7773 7748 11053 1076 6253 7747 7761 15710
> 7893 3978 3931 7802 7772 10988 1117 6197 7767 7789 15760
> 7775 3853 3809 7683 7654 10897 1081 6142 7651 7675 15534
> 7877 3919 3872 7789 7758 10986 1085 6218 7755 7773 15720
> 
> GFS2-mdbox, (no plugins)
> 
> Totals:
> Logi List Stat Sele Fetc Fet2 Stor Dele Expu Appe Logo
> 100%  50%  50% 100% 100% 100%  50% 100% 100% 100% 100%
>                           30%                  5%
> 7547 3739 3749 7455 7421 10605 1053 5931 7417 7443 15074
> 7480 3702 3724 7387 7367 10558 1064 5874 7366 7378 14946
> 7523 3759 3711 7428 7394 10560 1126 5898 7390 7412 15014
> 7455 3736 3621 7364 7326 10561 1088 5854 7324 7349 14880
> 7431 3712 3686 7337 7312 10406 1017 5882 7311 7328 14844
> 7426 3704 3671 7334 7296 10364 1076 5791 7296 7325 14834
> 7517 3673 3782 7425 7406 10554 1103 5913 7404 7414 15008

Hi, this performance seems excellent!

There is no reason at all why you might try this, but as someone on
lower end hardware I would be fascinated to learn how the performance
changes is:

- Switch FC to gig ethernet? (expecting substantial performance hit?)
- Reverting to maildir (suspecting much less of a hit based on your
numbers above?)
- OCFS vs GFS (although probably not sensible in your architecture since
you have a support contract for GFS, some have suggested OCFS can be
faster?)

Please do post any other performance results - seems like you have found
an excellent cluster setup?

Ed W