Hi Giacomo, sorry for a late reply. It turned out that the major improvement was made through increasing NFS packet size from 8k to 32k. After that no more of those messages were shown and everything is working just great :-) Thank you everyone for your suggestions and ideas again. Matej 2015-01-13 15:30 GMT+01:00 Giacomo Tenaglia <Giacomo.Tenaglia at cern.ch>: > On 09/01/15 13:01, Matej Mailing wrote: >> >> we have tweaked some NFS parameters for our backend storage, including >> packet sizes and now the load is constantly slower, there is much less >> I/O waiting. There were no lock-ups after that. So it really seems it >> was slow storage that was to be blamed. I will certainly report back >> if the failures occur again. > > > Hi Matej, > could you elaborate more on the tweaks you implemented on your NFS servers, > out of interest? > > Thanks, > Giacomo > > -- > Giacomo Tenaglia > CERN IT Department > Systems Team - Database Group > http://phonebook.cern.ch/#id=PE671909 > > > _______________________________________________ > Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > Post to : openstack at lists.openstack.org > Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack >