Hi,
I have two directories, cache_fast and cache_slow, and I would like to
move the least used files from fast to slow, aka, user side tiering.
cache_fast is pinned to fast_data ssd pool, while cache_slow to hdd
cephfs_data pool.
$ getfattr -n ceph.dir.layout /ceph/grid/cache_fast
getfattr: Removing leading '/' from absolute path names
# file: ceph/grid/cache_fast
ceph.dir.layout="stripe_unit=4194304 stripe_count=1 object_size=4194304
pool=fast_data"
$ getfattr -n ceph.dir.layout /ceph/grid/cache_slow
getfattr: Removing leading '/' from absolute path names
# file: ceph/grid/cache_slow
ceph.dir.layout="stripe_unit=4194304 stripe_count=1 object_size=4194304
pool=cephfs_data"
"mv" from cache_fast dir to cache_slow dir only renames the file in mds,
but does not involve migration to a different pool and changing the file
layout.
The only option I see at this point is to "cp" the file to a new dir and
removing it from the old one, but this would involve client side
operations and can be very slow.
Is there any better way, that would work ceph server side?
Best regards,
Andrej
--
_____________________________________________________________
prof. dr. Andrej Filipcic, E-mail: Andrej.Filipcic@xxxxxx
Department of Experimental High Energy Physics - F9
Jozef Stefan Institute, Jamova 39, P.o.Box 3000
SI-1001 Ljubljana, Slovenia
Tel.: +386-1-477-3674 Fax: +386-1-425-7074
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