[gpfsug-discuss] /tmp/mmfs vanishes randomly?

[Jonathan Buzzard]

On 08/11/2021 09:20, Billich Heinrich Rainer (ID SD) wrote:

> Hello,
> 
> We use /tmp/mmfs as dataStructureDump directory. Since a while I
> notice that this directory randomly vanishes. Mmhealth does not
> complain but just notes that it will no longer monitor the directory.
> Still I doubt that trace collection and similar will create the
> directory when needed?
> 
> Do you know of any spectrum scale internal mechanism that could cause
> /tmp/mmfs to get deleted? It happens on ESS nodes, with a plain IBM
> installation, too. It happens just on one or two nodes at a time,
> it's no cluster-wide cleanup or similar. We run scale 5.0.5 and ESS
> 6.0.2.2 and 6.0.2.2.
> 

I know several Linux distributions clear the contents of /tmp at boot 
time. Could that explain it?

I would say using /tmp like you are doing is not a sensible idea anyway 
and that you should be using something under /var.


JAB.

-- 
Jonathan A. Buzzard                         Tel: +44141-5483420
HPC System Administrator, ARCHIE-WeSt.
University of Strathclyde, John Anderson Building, Glasgow. G4 0NG