[drbd-mc] Lots of pvdisplay commands -> RA timeouts

[Caspar Smit]

2012/12/17 Rasto Levrinc <rasto.levrinc at gmail.com>

> On Mon, Dec 17, 2012 at 3:09 PM, Caspar Smit <c.smit at truebit.nl> 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.

Kind regards,
Caspar


> >
> > I think this is causing my RA monitors to timeout once in a while
> (sometimes
> > even two minutes timeout)
> >
> > Kind regards,
> > Caspar Smit
> >
>
> --
> Dipl.-Ing. Rastislav Levrinc
> rasto.levrinc at gmail.com
> Linux Cluster Management Console
> http://lcmc.sf.net/
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