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What does it mean when NFS server is not responding?
If the NFS client does not receive a response from the NFS server, the ” server not responding, still trying ” message may appear in syslog. Each message indicates that one NFS/RPC request (for example, one NFS WRITE) has been sent retrans times and timed out each time.
Why is NFS not available in Ubuntu 20.04 LTS?
NFS over TCP not available from 10.11.97.5 done. Unable to find a live file system on the network Looks like the interface does not bring up. If I compare the 18.04 and 20.04 releases, on the 20.04 it does not ask for an ip.
How to gather packet capture on RHEL NFS?
For a simple way to gather a packet capture using the tcpdump tool on a RHEL NFS Client, use the tcpdump-watch.sh script on the following solution: https://access.redhat.com/articles/4330981#intermittent.
What is the default Timeo for NFS mount?
NOTE: A very low value for timeo NFS mount option, which is much less than the default of 600, may increase the likelihood and frequency of this message. For example, setting timeo=5 with the default retrans=2 will cause this message to be printed if the NFS server takes longer than 0.5 + 1.0 = 1.5 seconds to respond to any NFS request.
Still on the NFS client, lets copy the local backup archive back to the NFS share. Completion time: about 110 minutes, omg this is really slow! Time is similar with what I get with a burp backup session. What could cause that? Why the read performance is good while the write is really bad?
How long does it take to write to a NFS share?
Completion time: about 5 minutes, seem good! Still on the NFS client, lets copy the local backup archive back to the NFS share. Completion time: about 110 minutes, omg this is really slow! Time is similar with what I get with a burp backup session.
Why do I need sync write on my NFS?
The point of sync write is to protect against the storage becoming unavailable during a write. You are writing backup files, and you’re happy to store them on SMB (as am I by the way), so the obvious solution here is to disable sync on the dataset used for backup.
Why does RHEL Mount hang on NFS server?
An NFS client kernel regression that caused the RPC layer to become non-functional. For more information, see RHEL6.7.z: NFS client with kernels 2.6.32-573.10.2.el6 or above hangs with ‘not responding, still trying’ messages and running processes in _spin_lock First, identify the timeframe of the problem.
How long does it take to RETRANS a NFS request?
Each message indicates that one NFS/RPC request (for example, one NFS WRITE) has been sent retrans times and timed out each time. With the default options of retrans and timeo, this message will be printed after 180 seconds. For more information, see the retrans and timeo options in the NFS manual page (‘man nfs’).