[Linux-cluster] Performance degradation after reboot

Kadlecsik Jozsef kadlec at mail.kfki.hu
Wed Feb 4 10:39:09 UTC 2009


On Tue, 3 Feb 2009, Kadlecsik Jozsef wrote:

> Due to a major power restructuring we had to shutdown our GFS cluster at 
> Saturday. Since then we have been suffering a serious performance 
> degradation. Previously system load was usually less than 1, in spikes 
> 3-4. Yesterday we had 180(!), without no apparent reason: network 
> interfaces are OK (settings just right, no error/packet loss), no settings 
> modified, usage of the cluster did not change. GFS is over AoE: the Coraid 
> boxes are just fine, no RAID degradation.

Sorry for the noise: it turned out that one interface did go wrong: 
instead of 1000Mb/s it worked at 10Mb/s. Sigh.

Best regards,
E-mail : kadlec at mail.kfki.hu, kadlec at blackhole.kfki.hu
PGP key: http://www.kfki.hu/~kadlec/pgp_public_key.txt
Address: KFKI Research Institute for Particle and Nuclear Physics
         H-1525 Budapest 114, POB. 49, Hungary

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