This is a duplicate post by mistake.Kindly ignore Please refer the discussion "Confusion with failover".
On Jun 26, 11:02 am, Dhruv <[EMAIL PROTECTED]> wrote: > Hello Everybody, > I am a novice in using Lustre. Wanted some help. > > Case1: > I tried the ost failover . Following is the config file to generate > xml file. > > rm -f failover_2node.xml > ./lmc -m failover_2node.xml --add net --node node-mds --nid sm01 -- > nettype tcp > ./lmc -m failover_2node.xml --add net --node node-ost1 --nid sm02 -- > nettype tcp > ./lmc -m failover_2node.xml --add net --node node-ost2 --nid sm06 -- > nettype tcp > ./lmc -m failover_2node.xml --add net --node client --nid '*' -- > nettype tcp > > # Cofigure MDS > ./lmc -m failover_2node.xml --add mds --node node-mds --mds mds_test -- > fstype ldiskfs --dev /dev/sdb5 > > # Cofigure LOV > ./lmc -m failover_2node.xml --add lov --lov lov_test --mds mds_test -- > stripe_sz 1048576 --stripe_cnt 2 --stripe_pattern 0 > > # Configures OSTs > ./lmc -m failover_2node.xml --add ost --node node-ost1 --lov lov_test > --ost ost1 --failover --fstype ldiskfs --dev /dev/sdb1 > ./lmc -m failover_2node.xml --add ost --node node-ost2 --lov lov_test > --ost ost1 --failover --fstype ldiskfs --dev /dev/sdb7 > > # Configure client (this is a 'generic' client used for all client > mounts) > ./lmc -m failover_2node.xml --add mtpt --node client --path /mnt/ > lustre --mds mds_test --lov lov_test > > . > Following were my lconf commands. > > 1. lconf --reformat --node node-ost1 failover_2node.xml .... on sm02 > 2. lconf --reformat --node node-ost2 --service=ost1 > failover_2node.xml .... on sm06 > 3. lconf --reformat --node node-mds failover_2node.xml.... on sm01 > 4. lconf --node client failover_2node.xml ... on sm02 and sm06 > > So my intention is to keep a failover ost node incase one fails. MDS > is on a seperate node. I tried different scenarios where one ost goes > down and still data can be retrieved from other. New files can be > created and old can be deleted on the failover ost. Data was available > most of time. > > So my question is whether Linux HA required to configure such failover > scenario? > > Case2: > I tried with same sort of formula as shown above for a failover MDS. > But when the main MDS fails, it doesnt switches to new MDS. Also when > the main MDS comes up again, the file system doesnt recover. I brought > down the client and again brought up. Then it was working. > > So is Linux HA or similar program necessary for configuring failover?? > > Dhruv > _______________________________________________ > Lustre-discuss mailing list > [EMAIL PROTECTED]://lists.lustre.org/mailman/listinfo/lustre-discuss _______________________________________________ Lustre-discuss mailing list [email protected] http://lists.lustre.org/mailman/listinfo/lustre-discuss
