2012/12/17 Rasto Levrinc <[email protected]> > On Mon, Dec 17, 2012 at 3:39 PM, Caspar Smit <[email protected]> wrote: > > 2012/12/17 Rasto Levrinc <[email protected]> > >> > >> On Mon, Dec 17, 2012 at 3:09 PM, Caspar Smit <[email protected]> wrote: > >> > Hi Rasto, > >> > > >> > I noticed this in one of my clusters: > >> > > >> ... > >> > >> > /usr/local/bin/lcmc-gui-helper-1.4.2 hw-info-daemon > >> > root 9869 0.0 0.0 39856 1516 pts/7 S+ 14:49 0:00 > >> > \_ sudo -E -p DRBD MC sudo pwd: /usr/local/bin/lcmc-gui-helper-1.4.2 > >> > hw-info-daemon > >> > root 9870 0.3 0.0 27676 5000 pts/7 S+ 14:49 0:00 > >> > \_ /usr/bin/perl /usr/local/bin/lcmc-gui-helper-1.4.2 hw-info-daemon > >> > root 18176 0.0 0.0 9060 1180 pts/7 S+ 14:50 0:00 > >> > \_ sh -c /sbin/pvdisplay -C --noheadings -o pv_name,vg_name > 2>/dev/null > >> > root 18177 0.0 0.0 17872 1604 pts/7 D+ 14:50 0:00 > >> > \_ /sbin/pvdisplay -C --noheadings -o pv_name,vg_name > >> > > >> > Why is LCMC running so many pvdisplay commands at once? > >> > >> Hi Caspar, > >> > >> it is running it once in 10 seconds, to see if something has changed. > >> Can you check what does it do on your nodes? > >> > >> /sbin/pvdisplay -C --noheadings -o pv_name,vg_name > >> > >> Rasto > >> > > > > # /sbin/pvdisplay -C --noheadings -o pv_name,vg_name > > /dev/sdb single_array3 > > /dev/sdc single_array3 > > /dev/sdd single_array3 > > /dev/sdh replicated_array1and2 > > /dev/sdi replicated_array1and2 > > /dev/sdj replicated_array1and2 > > /dev/sdk replicated_array1and2 > > > > I know that LCMC does monitor changes with the lcmc-gui-helper script, > but I > > presume the "hw-info-daemon" part has to run only once and not 5(+) times > > concurrently? > > > > Running 5x pvdisplay concurrently can really slow things down. > > It shouldn't run this 5x concurrently. What here probably happens, is that > the hw daemon takes too long and is assumed dead and is restarted. > > Can it be that /sbin/pvdisplay -C --noheadings -o pv_name,vg_name > hangs on or takes very long on your system, at least sometimes? > > Yes, that is probably the case because the system is under heavy (NFS) load.
> Anyway I can/should fix LCMC to deal with this situation. > That would be nice :) Kind regards, Caspar > Rasto > > -- > Dipl.-Ing. Rastislav Levrinc > [email protected] > Linux Cluster Management Console > http://lcmc.sf.net/ > _______________________________________________ > drbd-mc mailing list > [email protected] > http://lists.linbit.com/mailman/listinfo/drbd-mc >
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