source: gpfs_3.1_ker2.6.20/share/man/man8/mmunlinkfileset.8 @ 118

Last change on this file since 118 was 16, checked in by rock, 17 years ago
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[16]1.TH mmunlinkfileset 04/06/06
2mmunlinkfileset Command
3.SH "Name"
4.PP
5\fBmmunlinkfileset\fR - Removes the junction to the a GPFS
6fileset.
7.SH "Synopsis"
8.PP
9\fBmmunlinkfileset\fR \fIDevice\fR {\fIFilesetName\fR |
10\fB-J\fR \fIJunctionPath\fR} \fB[-f]\fR
11.SH "Description"
12.PP
13The \fBmmunlinkfileset\fR command removes the junction to the
14fileset. The junction can be specified by path or by naming the fileset
15that is its target. The unlink fails if there are files open in the
16fileset, unless the \fB-f \fR flag is specified. The root fileset
17may not be unlinked.
18.PP
19\fBAttention:\fR If you are using the TSM Backup Archive client you
20must use caution when you unlink filesets that contain data backed up by
21TSM. TSM tracks files by pathname and does not track filesets.
22As a result, when you unlink a fileset, it appears to TSM that you deleted the
23contents of the fileset. Therefore, the TSM Backup Archive client
24inactivates the data on the TSM server which may result in the loss of backup
25data during the expiration process.
26.PP
27For information on GPFS filesets, see the chapter
28\fIPolicy-based data management for
29GPFS\fR in
30\fIGeneral Parallel File
31System: Advanced Administration Guide\fR.
32.SH "Parameters"
33.PP
34.RS +3
35\fB\fIDevice\fR
36\fR
37.RE
38.RS +9
39The device name of the file system that contains the fileset.
40.PP
41File system names need not be fully-qualified. \fBfs0\fR is as
42acceptable as \fB/dev/fs0\fR.
43.RE
44.PP
45.RS +3
46\fB\fIFilesetName\fR
47\fR
48.RE
49.RS +9
50Specifies the name of the fileset to be removed.
51.RE
52.PP
53.RS +3
54\fB-J \fIJunctionPath\fR
55\fR
56.RE
57.RS +9
58Specifies the name of the junction to be removed.
59.PP
60A junction is a special directory entry that connects a name in a directory
61of one fileset to the root directory of another fileset.
62.RE
63.SH "Options"
64.PP
65.RS +3
66\fB-f
67\fR
68.RE
69.RS +9
70Forces the unlink to take place even though there may be open
71files. This option forcibly closes any open files, causing an
72\fBerrno\fR of \fBESTALE\fR on their next use of the file.
73.RE
74.SH "Exit status"
75.PP
76.PP
77.RS +3
78\fB0
79\fR
80.RE
81.RS +9
82Successful completion.
83.RE
84.PP
85.RS +3
86\fBnonzero
87\fR
88.RE
89.RS +9
90A failure has occurred.
91.RE
92.SH "Security"
93.PP
94You must have root authority to run the \fBmmunlinkfileset\fR
95command.
96.PP
97You may issue the \fBmmunlinkfileset\fR command from any node in the
98GPFS cluster.
99.PP
100When using the \fBrcp\fR and \fBrsh\fR commands for remote
101communication, a properly configured \fB.rhosts\fR file must exist
102in the root user's home directory on each node in the GPFS
103cluster. If you have designated the use of a different remote
104communication program on either the
105\fBmmcrcluster\fR
106or the
107\fBmmchcluster\fR command, you must
108ensure:
109.RS +3
110.HP 3
1111. Proper authorization is granted to all nodes in the GPFS cluster.
112.HP 3
1132. The nodes in the GPFS cluster can communicate without the use of a
114password, and without any extraneous messages.
115.RE
116.SH "Examples"
117.RS +3
118.HP 3
1191. This command indicates the current configuration of filesets for file
120system \fBgpfs1\fR:
121.sp
122.nf
123mmlsfileset gpfs1
124.fi
125.sp
126The system displays output similar to:
127.sp
128.nf
129Filesets in file system 'gpfs1':
130Name                     Status    Path\
131root                     Linked    /gpfs1\
132fset1                    Linked    /gpfs1/fset
133.fi
134.sp
135.sp
136This command unlinks fileset \fBfset1\fR from file system
137\fBgpfs1\fR:
138.sp
139.nf
140mmunlinkfileset gpfs1 fset1
141.fi
142.sp
143.sp
144The system displays output similar to:
145.sp
146.nf
147Fileset 'fset1' unlinked.
148.fi
149.sp
150.sp
151To confirm the change, issue this command:
152.sp
153.nf
154mmlsfileset gpfs1
155.fi
156.sp
157.sp
158The system displays output similar to:
159.sp
160.nf
161Filesets in file system 'gpfs1':
162Name                     Status    Path\
163root                     Linked    /gpfs1\
164fset1                    Unlinked  --
165.fi
166.sp
167.HP 3
1682. This command indicates the current configuration of filesets for file
169system \fBgpfs1\fR:
170.sp
171.nf
172mmlsfileset gpfs1
173.fi
174.sp
175The system displays output similar to:
176.sp
177.nf
178Filesets in file system 'gpfs1':
179Name                     Status    Path\
180root                     Linked    /gpfs1\
181fset1                    Linked    /gpfs1/fset1
182.fi
183.sp
184.sp
185This command unlinks junction path \fB/gpfs1/fset1\fR from file system
186\fBgpfs1\fR:
187.sp
188.nf
189mmunlinkfileset gpfs1 -J /gpfs1/fset1
190.fi
191.sp
192.sp
193The system displays output similar to:
194.sp
195.nf
196Fileset 'fset1' unlinked.
197.fi
198.sp
199.sp
200To confirm the change, issue this command:
201.sp
202.nf
203mmlsfileset gpfs1
204.fi
205.sp
206.sp
207The system displays output similar to:
208.sp
209.nf
210Filesets in file system 'gpfs1':
211Name                     Status    Path\
212root                     Linked    /gpfs1\
213fset1                    Unlinked  --
214.fi
215.sp
216.RE
217.SH "See also"
218.PP
219mmchfileset Command
220.PP
221mmcrfileset Command
222.PP
223mmdelfileset Command
224.PP
225mmlinkfileset Command
226.PP
227mmlsfileset Command
228.SH "Location"
229.PP
230\fB/usr/lpp/mmfs/bin\fR
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