Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Thursday 10 June 2010 17:19:53 Michael Joyner wrote:
> better, but still way below box2box bandwidth.... is fs type or fact
> using lvm a factor? Here are my test results, will try w/o LVM next.
I can really recommend "Part V. Optimizing DRBD performance" in the DRBD
Users Guide ... or invest in a "DRBD Healthcheck" offered by Linbit ;-)
Regards,
Andreas
>
> On 06/10/2010 04:05 AM, Andreas Kurz wrote:
> > .... LVM on your system supports barriers --> drbd supports barriers -->
> > barriers are used to enforce write-after-write dependencies per default
> > ... use drbd config-param 'no-disk-barrier'
>
> === new layout ==============================
>
> using /dev/sdb as /dev/drbd0, non-spanned vg.
>
> === new drbd.conf ============================
>
> global {
> usage-count yes;
> }
> common {
> protocol C;
> syncer { rate 700000K; }
> net {
> sndbuf-size 0;
> after-sb-0pri discard-least-changes;
> after-sb-1pri discard-secondary;
> }
> startup {
> degr-wfc-timeout 30000;
> }
> disk {
> no-disk-flushes;
> no-md-flushes;
> no-disk-barrier;
> }
>
> }
> resource sdb {
> on san-node-1.ewc.edu {
> device /dev/drbd0;
> disk /dev/sdb;
> address 192.168.75.201:7789;
> meta-disk internal;
> }
> on san-node-2.ewc.edu {
> device /dev/drbd0;
> disk /dev/sdb;
> address 192.168.75.202:7789;
> meta-disk internal;
> }
> }
>
> *********
> === *** mount /dev/vgdrbd0/nfs1 /data *** ===
>
> === iozone -a -e -g 4096 with peer down:
> real 0m1.757s, real 0m1.738s, real 0m1.753s, real
> 0m1.762s, real 0m1.745s
>
> === with peer up:
> real 0m6.739s, real 0m6.758s, real 0m6.619s, real 0m6.653s,
> real 0m6.636s
>
> === big files test =============================
>
> === DRBD === rm -rfv /data/ISOS; rsync -a --verbose --human-readable
> --progress ~mjoyner/ISOS /data/ISOS
>
> building file list ...
> 8 files to consider
> created directory /data/ISOS
> ISOS/
> ISOS/ISOS/
> ISOS/ISOS/.lck-5a00b81000000000
> 84 100% 0.00kB/s 0:00:00 (xfer#1, to-check=5/8)
> ISOS/ISOS/.lck-6500b81000000000
> 84 100% 82.03kB/s 0:00:00 (xfer#2, to-check=4/8)
> ISOS/ISOS/.lck-7700b81000000000
> 84 100% 82.03kB/s 0:00:00 (xfer#3, to-check=3/8)
> ISOS/ISOS/SW_DVD5_NTRL_SQL_Svr_2008_SP1_English_X15-51857.ISO
> 943.07M 100% 189.42MB/s 0:00:04 (xfer#4, to-check=2/8)
> ISOS/ISOS/SW_DVD5_SQL_Svr_Enterprise_Edtn_2008_English_MLF_X14-89207.ISO
> 3.26G 100% 189.81MB/s 0:00:16 (xfer#5, to-check=1/8)
> ISOS/ISOS/SW_DVD5_Windows_Svr_2008w_SP2_English__x64_DC_EE_SE_X15-41371.ISO
> 2.76G 100% 162.03MB/s 0:00:16 (xfer#6, to-check=0/8)
>
> #1) sent 6.96G bytes received 164 bytes 190.60M bytes/sec
> #2) sent 6.96G bytes received 164 bytes 244.10M bytes/sec
> #3) sent 6.96G bytes received 164 bytes 244.10M bytes/sec
>
> === LOCAL FS === rm -rfv /var/tmp/ISOS; rsync -a --verbose
> --human-readable --progress ~mjoyner/ISOS /var/tmp/ISOS
>
> #1) sent 6.96G bytes received 164 bytes 167.63M bytes/sec
> #2) sent 6.96G bytes received 164 bytes 185.51M bytes/sec
> #3) sent 6.96G bytes received 164 bytes 220.85M bytes/sec
>
> === time umount /data
> real 2m11.090s
> user 0m0.000s
> sys 1m49.566s
>
>
> *********
> === *** mount -o sync,data=journal /dev/vgdrbd0/nfs1 /data *** ===
>
> === iozone test, no peer
>
> real 0m9.483s real 0m9.583s real 0m9.583s real 0m9.559s
> real 0m9.491s
>
> === izone test, w/ peer up.
>
> real 0m41.558s real 0m41.386s real 0m41.456s real 0m41.448s
>
>
> === BIG FILES TEST
> no peer) sent 6.96G bytes received 164 bytes 74.40M bytes/sec
> w/ peer) sent 6.96G bytes received 164 bytes 29.79M bytes/sec
> rsync/var/tmp2/var/tmp) sent 6.96G bytes received 164 bytes 47.49M
> bytes/sec
>
> === time umount /data
>
> real 0m1.078s
> user 0m0.000s
> sys 0m1.075s
>
> _______________________________________________
> drbd-user mailing list
> drbd-user at lists.linbit.com
> http://lists.linbit.com/mailman/listinfo/drbd-user
>
--
: Andreas Kurz
: LINBIT | Your Way to High Availability
: Tel +43-1-8178292-64, Fax +43-1-8178292-82
:
: http://www.linbit.com
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