Ceph » CephFS

Steps-

1)Create a pool and a metadata pool and create a new cephfs using the pools and mount the file system from client
2) Now create another data pool and attach it to the already created cephfs FS using "ceph fs add_data_pool "
3) Using "setfattr" set the file layout to another pool.
4) Read layout using "getfattr"

Result: Only pool id of the new pool is shown instead of pool name.

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#ceph osd lspools
0 rbd,1 cephfs_data1,2 cephfs_metadata,3 cephfs_data,4 cephfs_data2

#ceph fs ls
name: cephfs, metadata pool: cephfs_metadata, data pools: [cephfs_data1 cephfs_data cephfs_data2 ]

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1. sudo setfattr -n ceph.file.layout.pool -v cephfs_data2 /mnt/mycephfs/file

1. sudo getfattr -n ceph.file.layout /mnt/mycephfs/file
   getfattr: Removing leading '/' from absolute path names
2. file: mnt/mycephfs/file

ceph.file.layout="stripe_unit=4194304 stripe_count=1 object_size=4194304 pool=4"

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1. sudo setfattr -n ceph.dir.layout.pool -v cephfs_data /mnt/mycephfs

1. sudo getfattr -n ceph.dir.layout /mnt/mycephfs
   getfattr: Removing leading '/' from absolute path names
2. file: mnt/mycephfs

ceph.dir.layout="stripe_unit=4194304 stripe_count=1 object_size=4194304 pool=3"

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