NAME
pnfsdscopymr —
copy or move a data storage file for a
MDS file to a different DS
SYNOPSIS
pnfsdscopymr |
[-r mounted-on-DS-dir]
[-m source-mounted-on-DS-dir
destination-mounted-on-DS-dir] mdsfile |
DESCRIPTION
Thepnfsdscopymr command copies a data storage file for
an MDS file from one DS to another DS. It is normally used to recover data
files onto a repaired DS, but can also be used to manually migrate a data
storage file from one DS to a different one. By default, the command will copy
the data storage file for “mdsfile” to one of the other DSs to
create a mirror of it. This might be done if the file was created before
mirroring was enabled on the pNFS service and now needs to be mirrored.
The following options are available:
-rmounted-on-DS-dir- This option indicates that the data storage file should be created on the DS that is mounted on the directory “mounted-on-DS-dir”. It will only do the copy if there is an entry in the pnfsd.dsfile extended attribute that has an IP address of 0.0.0.0. See pnfsdsfile(1) for how to do this. This is normally done for all regular files via find(1) in order to recover the data storage files onto a repaired DS.
-msource-mounted-on-DS-dir destination-mounted-on-DS-dir- This option indicates that the data storage file is to be migrated from the source DS mounted on the diectory “source-mounted-on-DS-dir” to the DS mounted on the directory “destination-mounted-on-DS-dir”. In this case, the data storage file will be removed from the source DS when the copy is completed.
This command must be run on the MDS and a typical usage would be as an argument for find(1) for all regular files.
For example, if the repaired DS is mounted on /data3 and files
previously stored on the repaired DS have had the DS's IP address set to
0.0.0.0:
# cd <top-level-exported-directory-on-the-MDS>
# find . -type f -exec pnfsdscopymr -r /data3 {} \;
SEE ALSO
find(1), nfsv4(4), pnfs(4), nfsd(8), pnfsdsfile(8), pnfsdskill(8)
HISTORY
The pnfsdscopymr command first appeared in
FreeBSD 12.0.