Steven Whitehouse a écrit :
Hi,
On Thu, 2009-10-01 at 11:36 +0200, Nicolas Ferré wrote:
Hi,
We recently installed a new cluster composed of 1 login node and several
computing nodes running CentOS. These nodes share a GFS2 fs made of two
partitions.
A strange thing is that on each node, the activity load (as monitored by
the 'top' command) is always larger than 1. After some googling, it
seems someone already reported this problem but I can't see any solution.
Moreover, on the login node, the load is even larger:
top - 11:34:17 up 1 day, 22:07, 1 user, load average: 16.19, 16.20, 16.12
while there is no cpu-intensive running processes.
Do you have an explanation?
Processes in uninterruptible sleep are counted in the load average. One
of the gfs2 daemons (in early versions) was set to sleep in this way. I
suggest that you should upgrade to a more recent version (simply because
a number of other bugs have been fixed since then) although the
uninterruptible sleep is harmless aside from its effect on the load
average,
As far as I know, our system is up-to-date.
> uname -a
Linux slater.up.univ-mrs.fr 2.6.18-164.el5 #1 SMP Thu Sep 3 03:28:30 EDT
2009 x86_64 x86_64 x86_64 GNU/Linu
> rpm -qa|grep gfs
kmod-gfs-0.1.31-3.el5_3.1
gfs2-utils-0.1.62-1.el5
gfs-utils-0.1.18-1.el5
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