Re: [gpfsug-discuss] Filesystem access issues via CES NFS

Malahal R Naineni Thu, 22 Nov 2018 02:32:50 -0800

We have seen empty lists (ls showing nothing). If this repeats, please take tcpdump from the client and we will investigate.

Regards, Malahal.

----- Original message -----
From: Andreas Mattsson <[email protected]>
Sent by: [email protected]
To: "[email protected]" <[email protected]>
Cc:
Subject: [gpfsug-discuss] Filesystem access issues via CES NFS
Date: Tue, Nov 20, 2018 8:47 PM

On one of our clusters, from time to time if users try to access files or folders via the direct full path over NFS, the NFS-client gets invalid information from the server.

For instance, if I run “ls /gpfs/filesystem/test/test2/test3” over NFS-mount, result is just full of ????????

If I recurse through the path once, for instance by ls’ing or cd’ing through the folders one at a time or running ls –R, I can then access directly via the full path afterwards.

This seem to be intermittent, and I haven’t found how to reliably recreate the issue.

Possibly, it can be connected to creating or changing files or folders via a GPFS mount, and then accessing them through NFS, but it doesn’t happen consistently.

Is this a known behaviour or bug, and does anyone know how to fix the issue?

These NSD-servers currently run Scale 4.2.2.3, while the CES is on 5.0.1.1.

GPFS clients run Scale 5.0.1.1, and NFS clients run CentOS 7.5.

Regards,

Andreas Mattsson

_____________________________________________

Andreas Mattsson
Systems Engineer

MAX IV Laboratory
Lund University
P.O. Box 118, SE-221 00 Lund, Sweden
Visiting address: Fotongatan 2, 224 84 Lund
Mobile: +46 706 64 95 44
[email protected]
www.maxiv.se

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Re: [gpfsug-discuss] Filesystem access issues via CES NFS

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