On Fri, 2007-06-29 at 10:35 +0300, Janne Peltonen wrote: > There seems to be great variation in the cycle time in different SAN > load conditions: > > On Fri, Jun 29, 2007 at 10:21:42AM +0300, Janne Peltonen wrote: > > [jmmpelto@pcn1 ~]$ time sudo service clvmd restart > > Deactivating VG mappi-primary: 0 logical volume(s) in volume group "mappi-primary" now active > > [ OK ] > > Stopping clvm: [ OK ] > > Starting clvmd: [ OK ] > > Activating VGs: 2 logical volume(s) in volume group "main" now active > > 78 logical volume(s) in volume group "mappi-primary" now active > > [ OK ] > > > > real 4m40.448s > > user 0m0.662s > > sys 0m0.299s > > (added and reduced 10 PV's) (and the activity on the SAN on other nodes > decreased) > > [jmmpelto@pcn1 ~]$ time sudo service clvmd restart > Deactivating VG mappi-primary: 0 logical volume(s) in volume group "mappi-primary" now active > [ OK ] > Stopping clvm: [ OK ] > Starting clvmd: [ OK ] > Activating VGs: 2 logical volume(s) in volume group "main" now active > 78 logical volume(s) in volume group "mappi-primary" now active > [ OK ] > > real 1m54.891s > user 0m0.672s > sys 0m0.324s > [jmmpelto@pcn1 ~]$ time sudo service clvmd restart > Password: > Deactivating VG mappi-primary: 0 logical volume(s) in volume group "mappi-primary" now active > [ OK ] > Stopping clvm: [ OK ] > Starting clvmd: [ OK ] > Activating VGs: 2 logical volume(s) in volume group "main" now active > 78 logical volume(s) in volume group "mappi-primary" now active > [ OK ] > > real 2m3.736s > user 0m0.660s > sys 0m0.321s > > > --Janne What's interesting to me here is the huge difference in real vs. user or sys time. It appears to spend most of the time waiting around. Can you trace the process to see what it's doing and where it sits and waits? -- Regards, -C -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
