Hi, On Mon, 2010-09-27 at 17:30 +0200, Marcello Percoco - Diennea wrote: > Hallo. > > > We have a 3 node cluster, with a shared Gfs2 used by our application. > > Evry day all the 3 machines get stuck, in the dmesg i see many âtask > hangââ with a stack trace referign to dlm and Gfs2 (i didinât have a > trace to post now, but next time i add it to the mail). > That would be helpful in tracking down the cause. Also a lock dump would be useful too (you need debugfs mounted somewhere). > > > The application write and delete many lock file, but every lock file > had is own directory. > So it is unlikely to be directory lock contention then, it seems. > Whath could be the problem? > > There are a lot of possible causes. Without the traces it is very tricky to narrow it down. I think you are looking in the right area though. > > Our Gfs2 had 512Mb journals, is this a good idea or not? > That sounds like a lot. It won't hurt though and I very much doubt that is related to the hangs. The key is to figure out whether the problem is actually a hang or whether it is just being slow. If you can get two lock dumps from a node that is having problems, say a minute or two apart, that should tell you that vital information, Steve. > > > Thnx. > > > > -- > > Marcello Percoco > IT Junior > > > > Diennea > Viale G. Marconi, 30/14 > 48018 Faenza (RA) - Italy > > E-Mail: marcello.percoco@xxxxxxxxxxx > Tel.: (+39) 0546 667432 - Int. 916 > Fax: (+39) 0546 399913 > > > > MagNews - E-Mail Marketing Solutions > http://www.magnews.it > > Diennea - Technology for Marketing > http://www.diennea.com > > > > DISCLAIMER > Questo messaggio e i suoi allegati si rivolgono esclusivamente ai > destinatari e possono contenere informazioni personali, confidenziali > o protette da diritti. Se ha ricevuto questo messaggio per errore, > l'utilizzo dei suoi contenuti à proibito e puà esporre a conseguenze > penali o civili. La invitiamo pertanto a rispedire immediatamente il > messaggio al mittente e cancellarne gli allegati senza conservarne una > copia. Per ulteriori informazioni, La preghiamo di contattarci > all'indirizzo postmaster@xxxxxxxxxxxx Grazie > This e-mail and any attachments may be confidential and the subject of > legal professional privilege. Any disclosure, use, storage or copying > of this e-mail without the consent of the sender is strictly > prohibited. Please notify the sender immediately if you are not the > intended recipient and then delete the e-mail from your inbox and do > not disclose the contents to another person, use, copy or store the > information in any medium. For further information write to > postmaster@xxxxxxxxxxxx Thanks > > > > > -- > Linux-cluster mailing list > Linux-cluster@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/linux-cluster -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
