Hi gents today we have upgraded our Coventry cluster from 9.1P6 to 9.2P2 and we are about 99% working we just have a strange issue with SAP database servers NFS mounts. When the server is bounced the mounts are attached with no problems but after a few minutes a df –h starts to be very slow reporting the NFS mounted directories and if the databases are started up they hang and a df –h then also hangs. This sometimes recovers enough to then allow a df –h to work again but the databases are a lost cause right now.

In the server messages we get lots of entries for the SVM

Jan 23 07:01:27 jwukccsbci kernel: nfs: server JWUKCSVM01 not responding, still trying

Jan 23 07:01:47 jwukccsbci last message repeated 5 times

Jan 23 07:02:07 jwukccsbci kernel: nfs: server JWUKCSVM01 OK

Jan 23 07:02:07 jwukccsbci last message repeated 5 times

Jan 23 07:02:27 jwukccsbci kernel: nfs: server JWUKCSVM01 not responding, still trying

Jan 23 07:02:47 jwukccsbci last message repeated 5 times

Jan 23 07:02:48 jwukccsbci kernel: nfs: server JWUKCSVM01 OK

Is there anything that would of changed in the upgrade to lock down NFS or changes options that we might need to change back.

The redhat servers are an old kernel version 2.6.18-371.el5 that has some bugs but this was working fine before the filer upgrade was carried out.

Regards

Mark

Data Centre Sysadmin Team

Managed Services

Phone:- 02476 694455 Ext 2567

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