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doc: ceph: update userspace command to get CephFS metadata

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According to ceph documentation [1], "getfattr -d /some/dir" no longer
displays the list of all extended attributes. Both CephFS kernel and
FUSE clients hide this information.

To retrieve the information you have to specify the particular attribute
name e.g. "getfattr -n ceph.dir.rbytes /some/dir".

[1] https://docs.ceph.com/en/latest/cephfs/quota/

Signed-off-by: Artem Ikonnikov <artem@datacrunch.io>
Reviewed-by: Xiubo Li <xiubli@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Artem Ikonnikov 2024-05-19 00:40:54 +03:00 committed by Ilya Dryomov
parent d8fc89815f
commit 93a2221c9c
1 changed files with 9 additions and 6 deletions
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15
Documentation/filesystems/ceph.rst
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@ -67,12 +67,15 @@ Snapshot names have two limitations:
more than 255 characters, and `<node-id>` takes 13 characters, the long
snapshot names can take as much as 255 - 1 - 1 - 13 = 240.
Ceph also provides some recursive accounting on directories for nested
files and bytes. That is, a 'getfattr -d foo' on any directory in the
system will reveal the total number of nested regular files and
subdirectories, and a summation of all nested file sizes. This makes
the identification of large disk space consumers relatively quick, as
no 'du' or similar recursive scan of the file system is required.
Ceph also provides some recursive accounting on directories for nested files
and bytes. You can run the commands::
getfattr -n ceph.dir.rfiles /some/dir
getfattr -n ceph.dir.rbytes /some/dir
to get the total number of nested files and their combined size, respectively.
This makes the identification of large disk space consumers relatively quick,
as no 'du' or similar recursive scan of the file system is required.
Finally, Ceph also allows quotas to be set on any directory in the system.
The quota can restrict the number of bytes or the number of files stored