Re: [PATCH] doc: ceph: update userspace command to get CephFS metadata

[Xiubo Li <xiubli@redhat.com>]

On 5/19/24 05:40, Artem Ikonnikov wrote:
> According to ceph documentation "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"
>
> Link: https://docs.ceph.com/en/latest/cephfs/quota/
> Signed-off-by: Artem Ikonnikov <artem@datacrunch.io>
> ---
>   Documentation/filesystems/ceph.rst | 15 +++++++++------
>   1 file changed, 9 insertions(+), 6 deletions(-)
>
> diff --git a/Documentation/filesystems/ceph.rst b/Documentation/filesystems/ceph.rst
> index 085f309ece60..6d2276a87a5a 100644
> --- a/Documentation/filesystems/ceph.rst
> +++ b/Documentation/filesystems/ceph.rst
> @@ -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

LGTM.

Reviewed-by: Xiubo Li <xiubli@redhat.com>