On 25/09/2021 14:07, Terry Barnaby wrote:
A few questions.
1. Are you saying your NFS server HW is the same for the past 25 years. Couldn't have been all Fedora, right?
No ( :) ) was using previous Linux and Unix systems before then. Certainly OS versions and hardware has changed over the years but setup is the same and no hardware changed in that last couple of years certainly no hardware/software changes in the last couple of months when the problem started to occur apart from Fedora33 updates.
OK. Kinda sounded like the server HW was "old".
2. How many clients? Connected on a single or multiple switches?
5 clients, two switches, but clients on the single switch to the server have the issue as well as others. Pings still operate in locked up condition.
Since all clients are being affected in the same manner it would point more towards a server issues as you've already
concluded.
3. Do the lockups happen during a given time of day, or random?
They appear to be random although they appear more frequently when first logging in (more /home accesses then ?).
Not that it matters, but everyone isn't logging in at the same time correct? At login folks are getting lock ups most
frequently.
4. Have you checked for possible disk errors on the server?
No disk related error messages and RAID file systems show as ok. Smartctl shows no issue on disks.
Are you running sysstat and collecting system information? You may want to consider doing that to see, for example,
if "sar -n NFS" or "sar -n NFSD" show anything unusual. LIke excessive re-transmission.
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Nothing to see here
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