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.
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Those messages are indicative of a network problem. The packets are going through, then they succeed when the NFS client retries, then they pause again.
I can't think why an ONTAP upgrade of this type would cause such a problem. If it was working before, it should be working now. If you had any kind of a locking, firewall, or general configuration problem you should have no access whatsoever.
I've seen some weird NFS bug sin SUSE, but that RHEL version should be fine.
What are the mount options used, and are you using DNFS?
From: toasters-bounces@teaparty.net [mailto:toasters-bounces@teaparty.net] On Behalf Of Mark Saunders Sent: Tuesday, January 23, 2018 4:29 PM To: toasters@teaparty.net Subject: NFS issue after upgrading filers to 9.2P2
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 The Sysadmin Team promoting PCMS Values ~Integrity~Respect~Commitment~ ~Continuous Improvement~ The information contained in this e-mail is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. If you are not the intended recipient of this e-mail, the use of this information or any disclosure, copying or distribution is prohibited and may be unlawful. If you received this in error, please contact the sender and delete the material from any computer. The views expressed in this e-mail may not necessarily be the views of the PCMS Group plc and should not be taken as authority to carry out any instruction contained. The PCMS Group reserves the right to monitor and examine the content of all e-mails.
The PCMS Group plc is a company registered in England and Wales with company number 1459419 whose registered office is at PCMS House, Torwood Close, Westwood Business Park, Coventry CV4 8HX, United Kingdom. VAT No: GB 705338743
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Mark Saunders -
Steiner, Jeffrey