Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Thu, Jan 27, 2011 at 3:24 PM, Felix Frank <ff at mpexnet.de> wrote:
> On 01/27/2011 11:13 AM, Nauman Yousuf wrote:
> > here
> >
> > Primary DRBD
> >
> > skip {
> > Lustre storage cluster replication setup
> > LUSTRE OSS active/active Replication
> >
> > }
> >
> > global {
> > minor-count 2;
> > }
> >
> > resource r0 {
> > protocol C;
> >
> > startup {
> > degr-wfc-timeout 120;
> > }
> >
> > disk {
> > on-io-error detach;
> > }
> >
> > net {
> > }
> >
> > syncer {
> > rate 30M;
> > group 1;
> > al-extents 257;
> > }
> >
> > on typhoon.example.com {
> > device /dev/drbd0;
> > disk /dev/cciss/c0d0p8;
> > address 10.65.200.21:7788;
> > meta-disk /dev/cciss/c0d0p6[0];
> > }
> >
> > on cyclops.example.com{
> > device /dev/drbd0;
> > disk /dev/cciss/c0d0p8;
> > address 10.65.200.30:7788;
> > meta-disk /dev/cciss/c0d0p6[0];
> > }
> > }
>
> I'm not familiar with Lustre operation. Does /dev/cciss/c0d0p8 mean that
> both nodes in fact use the same chunk of Lustre data? Because that would
> probably be bad.
>
NO each machine have separate c0d0p8 which is part of drbd then drbd device
are part of lustre .. to have a combined SAN. that i user for lustre client
.
>
> > resource r1 {
> > protocol C;
> >
> > startup {
> > degr-wfc-timeout 120;
> > }
> >
> > disk {
> > on-io-error detach;
> > }
> >
> > net {
> > }
> >
> > syncer {
> > rate 30M;
> > group 1;
> > al-extents 257;
> > }
> >
> > on typhoon.example.com {
> > device /dev/drbd1;
> > disk /dev/cciss/c0d0p9;
> > address 10.65.200.21:7789;
> > meta-disk /dev/cciss/c0d0p7[0];
> > }
> >
> > on cyclops.example.com {
> > device /dev/drbd1;
> > disk /dev/cciss/c0d0p9;
> > address 10.65.200.30:7789;
> > meta-disk /dev/cciss/c0d0p7[0];
> > }
> > }
> >
> >
> > Secondary DRBD
> >
> > skip {
> > Lustre storage cluster replication setup
> > LUSTRE OSS active/active Replication
> >
> > }
> >
> > global {
> > minor-count 2;
> > }
> >
> > resource r0 {
> > protocol C;
> >
> > startup {
> > degr-wfc-timeout 120;
> > }
> >
> > disk {
> > on-io-error detach;
> > }
> >
> > net {
> > }
> >
> > syncer {
> > rate 30M;
> > group 1;
> > al-extents 257;
> > }
> >
> > on typhoon.example.com {
> > device /dev/drbd0;
> > disk /dev/cciss/c0d0p8;
> > address 10.65.200.21:7788;
> > meta-disk /dev/cciss/c0d0p6[0];
> > }
> >
> > on cyclops.example.com {
> > device /dev/drbd0;
> > disk /dev/cciss/c0d0p8;
> > address 10.65.200.30:7788;
> > meta-disk /dev/cciss/c0d0p6[0];
> > }
> > }
> >
> > resource r1 {
> > protocol C;
> >
> > startup {
> > degr-wfc-timeout 120;
> > }
> >
> > disk {
> > on-io-error detach;
> > }
> >
> > net {
> > }
> >
> > syncer {
> > rate 30M;
> > group 1;
> > al-extents 257;
> > }
> >
> > on typhoon.example.com {
> > device /dev/drbd1;
> > disk /dev/cciss/c0d0p9;
> > address 10.65.200.21:7789 <http://10.65.200.21:7789>;
> > meta-disk /dev/cciss/c0d0p7[0];
> > }
> >
> > on cyclops.example.com {
> > device /dev/drbd1;
> > disk /dev/cciss/c0d0p9;
> > address 10.65.200.30:7789;
> > meta-disk /dev/cciss/c0d0p7[0];
> > }
> > }
> >
> > I am using DRBD to replicate Lsuter data .
>
> How? Where is your MDS? What are your OSSs? Where are the nodes that use
> DRBD and how do they access Lustre? (Sorry, I cannot infer that from the
> /dev/cciss/... stuff).
>
> /dev/ciss is particular partition on typhon and cyclops which make a DRBD
in between to have a raid device on netwoek then that raid is part of lustre
to have redundant disks.
> Also, please be careful to CC the list.
>
> Regards,
> Felix
>
--
Regards
Nauman Yousuf
0321-2549206
E-Eager, N-Noble, G-Genuine, I-Intelligent, N-Natural, E-Enthusiastic,
E-Energetic, R-Resourcefull --- ENGINEER
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