[gpfsug-discuss] Protocol node recommendations

[Frank Tower]

Hi,

We have here around 2PB GPFS (4.2.2) accessed through an HPC cluster with GPFS client on each node.

We will have to open GPFS to all our users over CIFS and kerberized NFS with ACL support for both protocol for around +1000 users

All users have different use case and needs:
- some will do random I/O through a large set of opened files (~5k files)
- some will do large write with 500GB-1TB files
- other will arrange sequential I/O with ~10k opened files

NFS and CIFS will share the same server, so I through to use SSD drive, at least 128GB memory with 2 sockets.

Regarding tuning parameters, I thought at:

maxFilesToCache 10000
syncIntervalStrict yes
workerThreads (8*core)
prefetchPct 40 (for now and update if needed)

I read the wiki 'Sizing Guidance for Protocol Node', but I was wondering if someone could share his experience/best practice regarding hardware sizing and/or tuning parameters.

Thank by advance,
Frank
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