PS: it is always a good idea to make a backup of your MDT, since it is relatively small compared to the rest of the filesystem. A full-device "dd" copy doesn't take too long and is the most accurate backup for ldiskfs.
Cheers, Andreas > On Feb 19, 2019, at 19:31, Andreas Dilger <adil...@whamcloud.com> wrote: > > Yes, it is possible to migrate the MGS files to another device as you > propose. I don't think there is any particular difference if you move it to a > separate ldiskfs or ZFS target. > > One caveat is that we don't test combined ZFS and ldiskfs targets on the same > node, though in theory it would work. > > Migrating the MDT from ldiskfs to ZFS is also possible with newer versions of > Lustre (2.12 for sure, I don't recall if it is in 2.10 or not). You need to > follow a special process to do this, please see the Lustre Operations Manual > for details. > > Cheers, Andreas > >> On Feb 19, 2019, at 17:48, Fernando Pérez <fpe...@icm.csic.es> wrote: >> >> Dear lustre experts. >> >> Whats is the best way to migrate a MGS device to ZFS? Copy the >> CONFIGS/filesystem_name-* files from the old ldiskfs device to the new ZFS >> MGS device? >> >> Currently we have a combined MDT/MGT under ldiskfs with lustre 2.10.4. >> >> We want to upgrade to lustre 2.12.0 and then separate the combined MDT/MGT >> and migrate MDT and MGT to separate ZFS devices. >> >> Regards. >> ============================================= >> Fernando Pérez >> Institut de Ciències del Mar (CMIMA-CSIC) >> Departament Oceanografía Física i Tecnològica >> Passeig Marítim de la Barceloneta,37-49 >> 08003 Barcelona >> Phone: (+34) 93 230 96 35 >> ============================================= >> >> _______________________________________________ >> lustre-discuss mailing list >> lustre-discuss@lists.lustre.org >> http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org _______________________________________________ lustre-discuss mailing list lustre-discuss@lists.lustre.org http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
