I vaguely recall seeing this and testing it. My notes to myself say: ‘As long as the export_id is unique, you are fine.’ See the manuals, ganesha loves Camel Case so it’s more than likely actually “Export_Id” or some such.
Ed Wahl Ohio Supercomputer Center From: gpfsug-discuss <[email protected]> On Behalf Of Leonardo Sala Sent: Tuesday, June 27, 2023 10:18 AM To: [email protected] Subject: [gpfsug-discuss] CES, Ganesha, and Filesystem_id Hallo, we are checking our current CES configuration, and we noticed that by default GPFS puts always Filesystem_Id=666. 666 [*], no matter which Export_Id value the export has. To my understanding (which is poor!), this means that all clients Hallo, we are checking our current CES configuration, and we noticed that by default GPFS puts always Filesystem_Id=666.666 [*], no matter which Export_Id value the export has. To my understanding (which is poor!), this means that all clients will see all our exports (~20) with the same device number, creating various possible issues (e.g. file state handles). Questions: * is there a reason for such default value? If we change it, are there unpleasant effects we could see? * what would be a reasonable value? Looking around I saw that Filesystem_Id = Export_Id.Export_Id is quite common, with the possible issue of using the forbidden 152.152 [**] * what happens if we actually remove the Filesytem_Id parameter from gpfs.ganesha.exports.conf? * is there a way to modify Filesystem_Id in gpfs.ganesha.exports.conf without editing the file, eg using mmnfs commands (seems not, but I might be mistaken)? Thanks a lot! cheers leo [*] https://www.ibm.com/docs/en/storage-scale/5.0.4?topic=exports-making-bulk-changes-nfs<https://urldefense.com/v3/__https:/www.ibm.com/docs/en/storage-scale/5.0.4?topic=exports-making-bulk-changes-nfs__;!!KGKeukY!2ZoLSJiACv5XMmk6G9XTy958E9yslS6wIGqy1RaI3D0d_6hraQHFRLCEBCWh73texj92o7WDULi105hTHXqh$> [**] https://github.com/nfs-ganesha/nfs-ganesha/issues/615<https://urldefense.com/v3/__https:/github.com/nfs-ganesha/nfs-ganesha/issues/615__;!!KGKeukY!2ZoLSJiACv5XMmk6G9XTy958E9yslS6wIGqy1RaI3D0d_6hraQHFRLCEBCWh73texj92o7WDULi10-6QZN1l$> -- Paul Scherrer Institut Dr. Leonardo Sala Group Leader Data Analysis and Research Infrastructure Deputy Department Head a.i Science IT Infrastructure and Services department Science IT Infrastructure and Services department (AWI) WHGA/036 Forschungstrasse 111 5232 Villigen PSI Switzerland Phone: +41 56 310 3369 [email protected]<mailto:[email protected]> www.psi.ch<https://urldefense.com/v3/__http:/www.psi.ch__;!!KGKeukY!2ZoLSJiACv5XMmk6G9XTy958E9yslS6wIGqy1RaI3D0d_6hraQHFRLCEBCWh73texj92o7WDULi105e6ItOo$>
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