.TH mmunlinkfileset 04/06/06
mmunlinkfileset Command
.SH "Name"
.PP
\fBmmunlinkfileset\fR - Removes the junction to the a GPFS
fileset.
.SH "Synopsis"
.PP
\fBmmunlinkfileset\fR \fIDevice\fR {\fIFilesetName\fR |
\fB-J\fR \fIJunctionPath\fR} \fB[-f]\fR
.SH "Description"
.PP
The \fBmmunlinkfileset\fR command removes the junction to the
fileset. The junction can be specified by path or by naming the fileset
that is its target. The unlink fails if there are files open in the
fileset, unless the \fB-f \fR flag is specified. The root fileset
may not be unlinked.
.PP
\fBAttention:\fR If you are using the TSM Backup Archive client you
must use caution when you unlink filesets that contain data backed up by
TSM. TSM tracks files by pathname and does not track filesets.
As a result, when you unlink a fileset, it appears to TSM that you deleted the
contents of the fileset. Therefore, the TSM Backup Archive client
inactivates the data on the TSM server which may result in the loss of backup
data during the expiration process.
.PP
For information on GPFS filesets, see the chapter
\fIPolicy-based data management for
GPFS\fR in
\fIGeneral Parallel File
System: Advanced Administration Guide\fR.
.SH "Parameters"
.PP
.RS +3
\fB\fIDevice\fR
\fR
.RE
.RS +9
The device name of the file system that contains the fileset.
.PP
File system names need not be fully-qualified. \fBfs0\fR is as
acceptable as \fB/dev/fs0\fR.
.RE
.PP
.RS +3
\fB\fIFilesetName\fR
\fR
.RE
.RS +9
Specifies the name of the fileset to be removed.
.RE
.PP
.RS +3
\fB-J \fIJunctionPath\fR
\fR
.RE
.RS +9
Specifies the name of the junction to be removed. 
.PP
A junction is a special directory entry that connects a name in a directory
of one fileset to the root directory of another fileset.
.RE
.SH "Options"
.PP
.RS +3
\fB-f
\fR
.RE
.RS +9
Forces the unlink to take place even though there may be open
files. This option forcibly closes any open files, causing an
\fBerrno\fR of \fBESTALE\fR on their next use of the file.
.RE
.SH "Exit status"
.PP
.PP
.RS +3
\fB0
\fR
.RE
.RS +9
Successful completion.
.RE
.PP
.RS +3
\fBnonzero
\fR
.RE
.RS +9
A failure has occurred.
.RE
.SH "Security"
.PP
You must have root authority to run the \fBmmunlinkfileset\fR
command.
.PP
You may issue the \fBmmunlinkfileset\fR command from any node in the
GPFS cluster.
.PP
When using the \fBrcp\fR and \fBrsh\fR commands for remote
communication, a properly configured \fB.rhosts\fR file must exist
in the root user's home directory on each node in the GPFS
cluster. If you have designated the use of a different remote
communication program on either the
\fBmmcrcluster\fR
or the
\fBmmchcluster\fR command, you must
ensure:
.RS +3
.HP 3
1. Proper authorization is granted to all nodes in the GPFS cluster.
.HP 3
2. The nodes in the GPFS cluster can communicate without the use of a
password, and without any extraneous messages.
.RE
.SH "Examples"
.RS +3
.HP 3
1. This command indicates the current configuration of filesets for file
system \fBgpfs1\fR:
.sp
.nf
mmlsfileset gpfs1
.fi
.sp
The system displays output similar to:
.sp
.nf
Filesets in file system 'gpfs1':
Name                     Status    Path\ 
root                     Linked    /gpfs1\ 
fset1                    Linked    /gpfs1/fset
.fi
.sp
.sp
This command unlinks fileset \fBfset1\fR from file system
\fBgpfs1\fR:
.sp
.nf
mmunlinkfileset gpfs1 fset1
.fi
.sp
.sp
The system displays output similar to:
.sp
.nf
Fileset 'fset1' unlinked.
.fi
.sp
.sp
To confirm the change, issue this command:
.sp
.nf
mmlsfileset gpfs1
.fi
.sp
.sp
The system displays output similar to:
.sp
.nf
Filesets in file system 'gpfs1':
Name                     Status    Path\ 
root                     Linked    /gpfs1\ 
fset1                    Unlinked  --
.fi
.sp
.HP 3
2. This command indicates the current configuration of filesets for file
system \fBgpfs1\fR:
.sp
.nf
mmlsfileset gpfs1
.fi
.sp
The system displays output similar to:
.sp
.nf
Filesets in file system 'gpfs1':
Name                     Status    Path\ 
root                     Linked    /gpfs1\ 
fset1                    Linked    /gpfs1/fset1
.fi
.sp
.sp
This command unlinks junction path \fB/gpfs1/fset1\fR from file system
\fBgpfs1\fR:
.sp
.nf
mmunlinkfileset gpfs1 -J /gpfs1/fset1
.fi
.sp
.sp
The system displays output similar to:
.sp
.nf
Fileset 'fset1' unlinked.
.fi
.sp
.sp
To confirm the change, issue this command:
.sp
.nf
mmlsfileset gpfs1
.fi
.sp
.sp
The system displays output similar to:
.sp
.nf
Filesets in file system 'gpfs1':
Name                     Status    Path\ 
root                     Linked    /gpfs1\ 
fset1                    Unlinked  --
.fi
.sp
.RE
.SH "See also"
.PP
mmchfileset Command
.PP
mmcrfileset Command
.PP
mmdelfileset Command
.PP
mmlinkfileset Command
.PP
mmlsfileset Command
.SH "Location"
.PP
\fB/usr/lpp/mmfs/bin\fR