PNFSDSCOPYMR(8)

✨ hiiii bestie, you’ve landed on pnfsdscopymr(8) from the System Manager’s Manual — the niche little Unix icon that copies or moves a data storage file for an MDS file to a different DS 💅

🎀 NAME

pnfsdscopymr — copy or move a data storage file for an 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

okay so pnfsdscopymr copies a data storage file for an MDS file from one DS to another DS. It’s normally used to recover data files onto a repaired DS, but it can also be used to manually migrate a data storage file from one DS to a different one. By default, the command copies 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.

✨ OPTIONS ✨

the following options are available, bestie:

• -r mounted-on-DS-dir — this option says 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. 🫶
• -m source-mounted-on-DS-dir destination-mounted-on-DS-dir — this option says the data storage file is to be migrated from the source DS mounted on the directory 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. 😭

if the copy/migration is already done, the command will simply exit(0), so it can safely be used on all regular files in the exported directory tree on the MDS. 💖

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, you’d do this:

# 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. 🌈

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okay that’s the whole page — cute sign-off time: brought to you by Debian, dated June 2, 2018, with the PNFSDSCOPYMR(8) footer energy 💅🎀✨