Hi Bernd I will defer to others on some of your points, but just to note that a 2.15.5 release is expected out shortly with support for Alma 8.10 and ZFS 2.1.15 so, if your timing permits, perhaps you should defer until that release is available
Peter On 5/17/24, 6:25 AM, "lustre-discuss on behalf of Bernd Melchers via lustre-discuss" <[email protected] <mailto:[email protected]> on behalf of [email protected] <mailto:[email protected]>> wrote: Hi All, we plan to update our lustre from 2.12.9 to 2.15.4. We will update the OS from CentOS 7.9 to Alma 8.9, the recommended [1] OS version for 2.15.4. The system setup is based on ZFS, which is at (slightly patched) 0.7.13 and will be updated as recommended to version 2.1.11. We did not see a guide or experience report for this update. Any pointers to a document, or any hints about pitfalls to avoid? We were for wondering if it is better practice to leave the zpools at the old level for a system that has seen its share of crashed in several years of operation, or if "zpool upgrade -a" is the better option prior to start lustre 2.15. Also we think about using the most recent version of zfs 2.1, which is 2.1.15 and not 2.1.11 The content of our /etc/modprobe.d/zfs.conf is: options zfs_arc_max=74959079424 zfs_vdev_scheduler=deadline metaslab_debug_unload=1 zfs_vdev_async_read_max_active=16 zfs_vdev_aggregation_limit=1 zfs_vdev_async_write_active_min_dirty_percent=20 zfs_vdev_async_write_min_active=5 zfs_vdev_sync_read_min_active=16 zfs_vdev_sync_read_max_active=16 and /etc/modprobe.d/lustre.conf is: options lnet networks="o2ib0(ib0),tcp0(eno1)" options ptlrpc at_min=40 at_max=400 ldlm_enqueue_min=260 Should we change/remove/add some parameters? Best regards Bernd Melchers [1] https://wiki.whamcloud.com/display/PUB/Lustre+Support+Matrix <https://wiki.whamcloud.com/display/PUB/Lustre+Support+Matrix> -- Archiv- und Backup-Service | [email protected] <mailto:[email protected]> Freie Universität Berlin | Tel. +49-30-838-55905 _______________________________________________ lustre-discuss mailing list [email protected] <mailto:[email protected]> http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org <http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org> _______________________________________________ lustre-discuss mailing list [email protected] http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
