> 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.
> 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>
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