lfs-mirror-delete(1)

NAME

lfs-mirror-delete - delete a specified mirror from an existing mirrored file

SYNOPSIS

DESCRIPTION

This command deletes a mirror with mirror ID MIRROR_ID or containing a component with COMP_ID or containing a component on POOL out of a mirrored file specified by the path name MIRRORED_FILE.

If MIRRORED_FILE has only one mirror existing after split, it will be converted to a regular non-mirrored file.

If the deleted mirror is a data mirror that has an associated erasure coding (EC) parity mirror, the MDS deletes the parity mirror along with the data mirror in a single operation. Deleting the last data mirror is refused, since a file left holding parity mirrors alone cannot be read. When deleting a parity mirror directly, a warning is printed when it takes away the last redundant copy of the file, since the data mirror it protected is then left alone. No warning is printed while another data mirror remains, and --no-warn suppresses it entirely.

If the original MIRRORED_FILE is not a mirrored file, then the command will return an error.

OPTIONS

--no-warn

Do not print the warning issued when the operation removes the last redundant copy of the file.

--mirror-id MIRROR_ID

The numerical unique identifier for a mirror. The mirror ID is unique within a mirrored file and is automatically assigned at file creation or extension time. It can be fetched by lfs getstripe command (see lfs(1)).

-I, --comp-id COMP_ID

The numerical unique identifier for a component contained within a mirror.

--pool POOL

The pool storing a component contained within a mirror.

EXAMPLES

Delete the mirror with ID 2 of /mnt/lustre/file1:

# lfs mirror delete --mirror-id 2 /mnt/lustre/file1

Delete the mirror containing the component with ID 65537 of /mnt/lustre/file1:

# lfs mirror delete --comp-id 65537 /mnt/lustre/file1

Split a mirror on pool ssd out of /mnt/lustre/file1 and destroy it:

# lfs mirror delete --pool ssd /mnt/lustre/file1

Delete the data mirror with ID 1 out of an EC mirrored file that has another data mirror as well. Its associated parity mirror is deleted along with it:

# lfs mirror delete --mirror-id 1 /mnt/lustre/ecfile

AVAILABILITY

The lfs mirror delete command is part of the lustre(7) filesystem package since release 2.13.0

SEE ALSO

lfs(1), lfs-mirror-create(1), lfs-mirror-extend(1), lfs-mirror-resync(1), lfs-mirror-split(1), lfs-mirror-verify(1), lfs-setstripe(1)