[ceph-users] cephfs - modifying the ceph.file.layout of existing files

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(a)ijs.si 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 -------------------------------------------------------------