2018-06-15 19:45:15 +00:00
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.\" Copyright (c) 2018 Rick Macklem
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd June 2, 2018
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.Dt PNFSDSCOPYMR 8
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.Os
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.Sh NAME
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.Nm pnfsdscopymr
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.Nd
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copy or move a data storage file for a MDS file to a different DS
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.Sh SYNOPSIS
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.Nm
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.Op Fl r Ar mounted-on-DS-dir
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.Op Fl m Ar source-mounted-on-DS-dir destination-mounted-on-DS-dir
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.Ar mdsfile
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.Sh DESCRIPTION
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The
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.Nm
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command copies a data storage file for an MDS file from one DS to another DS.
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It is normally used to recover data files onto a repaired DS, but can also
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be used to manually migrate a data storage file from one DS to a different one.
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By default, the command will copy the data storage file for
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.Dq mdsfile
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to one of the other DSs to create a mirror of it.
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This might be done if the file was created before mirroring was enabled on
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the pNFS service and now needs to be mirrored.
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.Pp
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The following options are available:
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.Bl -tag -width Ds
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.It Fl r Ar mounted-on-DS-dir
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This option indicates that the data storage file should be created on the DS
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that is mounted on the directory
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.Dq mounted-on-DS-dir .
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It will only do the copy if there is an entry in the pnfsd.dsfile extended
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attribute that has an IP address of 0.0.0.0.
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See
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.Xr pnfsdsfile 1
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for how to do this.
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This is normally done for all regular files via
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.Xr find 1
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in order to recover the data
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storage files onto a repaired DS.
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.It Fl m Ar source-mounted-on-DS-dir destination-mounted-on-DS-dir
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This option indicates that the data storage file is to be migrated from
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the source DS mounted on the diectory
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.Dq source-mounted-on-DS-dir
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to the DS mounted on the directory
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.Dq destination-mounted-on-DS-dir .
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In this case, the data storage file will be removed from the source DS
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when the copy is completed.
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.El
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If the copy/migration is already done, the command will simply exit(0),
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so that it can safely be used on all regular files in the exported directory
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tree on the MDS.
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.Pp
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This command must be run on the MDS and a typical usage would be as an
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argument for
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.Xr find 1
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for all regular files.
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.sp
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For example, if the repaired DS is mounted on /data3 and files previously
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stored on the repaired DS have had the DS's IP address set to 0.0.0.0:
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.br
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# cd <top-level-exported-directory-on-the-MDS>
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.br
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# find . -type f -exec pnfsdscopymr -r /data3 {} \\;
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.Sh SEE ALSO
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.Xr find 1 ,
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.Xr nfsv4 4 ,
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.Xr pnfs 4 ,
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.Xr nfsd 8 ,
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.Xr pnfsdsfile 8 ,
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.Xr pnfsdskill 8
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.Sh HISTORY
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The
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.Nm
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2018-06-15 21:07:14 +00:00
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command first appeared in
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.Fx 12.0 .
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