On 19/06/2014 22:51, Wido den Hollander wrote: > > > > >> Op 19 jun. 2014 om 16:10 heeft "Erik Logtenberg" <[email protected]> het >> volgende geschreven: >> >> Hi, >> >> Are erasure coded pools suitable for use with MDS? >> > > I don't think so. It does in-place updates of objects and that doesn't work > with EC pools.
Hi Erik, This is correct. You can however set the replicated pool to be the cache of an erasure coded pool. https://ceph.com/docs/master/dev/cache-pool/ Cheers > > >> I tried to give it a go by creating two new pools like so: >> >> # ceph osd pool create ecdata 128 128 erasure >> # ceph osd pool create ecmetadata 128 128 erasure >> >> Then looked up their id's: >> >> # ceph osd lspools >> ..., 6 ecdata,7 ecmetadata >> >> # ceph mds newfs 7 6 --yes-i-really-mean-it >> >> But then when I start MDS, it crashes horribly. I did notice that MDS >> created a couple of objects in the ecmetadata pool: >> >> # rados ls -p ecmetadata >> mds0_sessionmap >> mds0_inotable >> 1.00000000.inode >> 200.00000000 >> mds_anchortable >> mds_snaptable >> 100.00000000.inode >> >> However it crashes immediately after. I started mds manually to try and >> see what's up: >> >> # ceph-mds -i 0 -d >> >> This spews out so much information that I saved it in a logfile, added >> as an attachment. >> >> Kind regards, >> >> Erik. >> <mds.log> >> _______________________________________________ >> ceph-users mailing list >> [email protected] >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > _______________________________________________ > ceph-users mailing list > [email protected] > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > -- Loïc Dachary, Artisan Logiciel Libre
signature.asc
Description: OpenPGP digital signature
_______________________________________________ ceph-users mailing list [email protected] http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
