Hi Simon,
that's a very good point, thanks a lot :) I have it remotely mounted on a client cluster, so I will consider priorities when mounting the filesystems with remote cluster mount. That's very useful. Also, as far as I saw, same approach can be also applied to local mounts (via mmchfs) during daemon startup with the same option --mount-priority. Thanks a lot for the hints, these are very useful. I'll test that. Cheers, Marc _________________________________________________________ Paul Scherrer Institut High Performance Computing & Emerging Technologies Marc Caubet Serrabou Building/Room: OHSA/014 Forschungsstrasse, 111 5232 Villigen PSI Switzerland Telephone: +41 56 310 46 67 E-Mail: marc.cau...@psi.ch ________________________________ From: gpfsug-discuss-boun...@spectrumscale.org <gpfsug-discuss-boun...@spectrumscale.org> on behalf of Simon Thompson <s.j.thomp...@bham.ac.uk> Sent: Thursday, November 19, 2020 5:42:07 PM To: gpfsug main discussion list Subject: Re: [gpfsug-discuss] Mounting filesystem on top of an existing filesystem If it is a remote cluster mount from your clients (hopefully!), you might want to look at priority to order mounting of the file-systems. I don’t know what would happen if the overmounted file-system went away, you would likely want to test. Simon From: <gpfsug-discuss-boun...@spectrumscale.org> on behalf of "marc.cau...@psi.ch" <marc.cau...@psi.ch> Reply to: "gpfsug-discuss@spectrumscale.org" <gpfsug-discuss@spectrumscale.org> Date: Thursday, 19 November 2020 at 15:39 To: "gpfsug-discuss@spectrumscale.org" <gpfsug-discuss@spectrumscale.org> Subject: [gpfsug-discuss] Mounting filesystem on top of an existing filesystem Hi, I have a filesystem holding many projects (i.e., mounted under /projects), each project is managed with filesets. I have a new big project which should be placed on a separate filesystem (blocksize, replication policy, etc. will be different, and subprojects of it will be managed with filesets). Ideally, this filesystem should be mounted in /projects/newproject. Technically, mounting a filesystem on top of an existing filesystem should be possible, but, is this discouraged for any reason? How GPFS would behave with that and is there a technical reason for avoiding this setup? Another alternative would be independent mount point + symlink, but I really would prefer to avoid symlinks. Thanks a lot, Marc _________________________________________________________ Paul Scherrer Institut High Performance Computing & Emerging Technologies Marc Caubet Serrabou Building/Room: OHSA/014 Forschungsstrasse, 111 5232 Villigen PSI Switzerland Telephone: +41 56 310 46 67 E-Mail: marc.cau...@psi.ch
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