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

[Aliet Santiesteban Sifontes]

We have used sdbox as mailbox format, and all the user data is configured in
LDAP Servers

2011/5/5 Aliet Santiesteban Sifontes <alietsantiesteban at gmail.com>

> We have done some benchmarking tests using dovecot 2.0.12 to find the best
> shared filesystem for hosting many users, here I share with you the results,
> notice the bad perfomance of all the shared filesystems against the local
> storage.
> Is there any specific optimization/tunning on dovecot for use GFS2 on
> rhel6??, we have configured the director to make the user mailbox persistent
> in a node, we will thank's any help from you.
> we are interested in using GFS2 or NFS, we believe the problem is the
> locks, how can we improve this??
>
> best regards, Aliet
>
> The results
>
>  rhel 4.8 x86_64/GFS1 two nodes, shared FC lun on a SAN
>
> 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%
> 1- 2608 1321 1311 2608 2508 3545  547 2001 2493 2702 5282
> 2- 2810 1440 1430 2810 2688 3835  403 2154 2679 2925 5706
> 3- 2913 1457 1441 2908 2778 3913  417 2253 2773 3034 5924
> 4- 2814 1448 1412 2812 2695 3910  401 2186 2686 2929 5712
> 5- 2789 1464 1432 2787 2652 3774  427 2112 2649 2879 5676
> 6- 2843 1460 1444 2839 2722 3948  422 2164 2713 2957 5778
>
> rhel6 x86_64/GFS2 two nodes, shared FC lun on a SAN(Used RDM in VMWare
> vSphere for GFS2 lun)
> Tunned cluster suite cluster.conf +    <dlm plock_ownership="1"
> plock_rate_limit="0"/>
>             <gfs_controld plock_rate_limit="0"/>
>
> 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%
> 1- 2730 1340 1356 2704 2644 3748  522 2125 2643 2662 5422
> 2- 3309 1618 1659 3294 3223 4658  531 2563 3221 3239 6596
> 3- 2131 1046 1017 2055 2025 2911  381 1608 2024 2052 4256
> 4- 2176 1055 1039 2082 2058 2947  377 1671 2058 2078 4344
> 5- 1859  928  931 1859 1800 2626  304 1454 1799 1801 3706
> 6- 2672 1322 1329 2672 2607 3758  464 2097 2606 2615 5326
>
>
> rhel6 x86_64/GFS2 two nodes, shared FC lun on a SAN(Used RDM in VMWare
> vSphere for GFS2 lun)
> Cluster suite defaults configs for plocks
>
> 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%
> 1- 1417  644  676 1325 1305 1872  308 1048 1302 1318 2824
> 2-  837  378  392  742  726 1050  117  588  722  734 1658
> 3-  803  363  347  752  745 1069  153  597  744  750 1658
> 4- 1682  802  811 1587 1569 2261  291 1299 1569 1585 3360
> 5- 1146  583  564 1146 1037 1500  213  811 1037 1049 2290
> 6-  838  403  366  744  734 1057  152  561  731  736 1664
>
> rhel6 x86_64 two nodes used NFS(NAS Freenas 0.8, nfsvers 3)
>
> 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%
> 1- 1382  699  691 1357 1063 1500  224  861 1053 1313 2694
> 2- 1634  785  799 1610 1459 2120  311 1192 1451 1570 3204
> 2- 1635  826  806 1611 1463 2088  345 1159 1459 1568 3190
> 3- 1574  758  781 1537 1403 2060  324 1135 1396 1504 3090
> 4- 1685  842  807 1653 1506 2135  349 1215 1504 1634 3344
> 5- 1766  850  893 1737 1582 2289  335 1288 1579 1705 3480
> 6- 1597  797  769 1572 1423 2007  313 1133 1420 1536 3142
>
> rhel6 x86_64 local storage
>
> 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%
> 1- 7798 3868 3889 7706 7566 10713 1080 6089 7559 7688 15562
> 2- 7806 3879 3874 7716 7585 10873 1114 6018 7578 7696 15572
> 3- 7866 3910 3855 7773 7748 11053 1076 6253 7747 7761 15710
> 4- 7893 3978 3931 7802 7772 10988 1117 6197 7767 7789 15760
> 5- 7775 3853 3809 7683 7654 10897 1081 6142 7651 7675 15534
> 6- 7877 3919 3872 7789 7758 10986 1085 6218 7755 7773 15720
>