3 vos_dump - Converts a volume into ASCII format and writes it to a file
10 B<vos dump> S<<< B<-id> <I<volume name or ID>> >>>
11 S<<< [B<-time> <I<dump from time>>] >>>
12 S<<< [B<-file> <I<dump file>>] >>> S<<< [B<-server> <I<server>>] >>>
13 S<<< [B<-partition> <I<partition>>] >>> [B<-clone>] [B<-omitdirs>]
14 S<<< [B<-cell> <I<cell name>>] >>> [B<-noauth>] [B<-localauth>]
15 [B<-verbose>] [B<-encrypt>] [B<-noresolve>]
16 S<<< [B<-config> <I<config directory>>] >>>
19 B<vos du> S<<< B<-i> <I<volume name or ID>> >>>
20 S<<< [B<-t> <I<dump from time>>] >>>
21 S<<< [B<-f> <I<dump file>>] >>> S<<< [B<-s> <I<server>>] >>>
22 S<<< [B<-p> <I<partition>>] >>>
23 [B<-cl>] [B<-o>] S<<< [B<-ce> <I<cell name>>] >>> [B<-noa>] [B<-l>]
24 [B<-v>] [B<-e>] [B<-nor>]
25 S<<< [B<-co> <I<config directory>>] >>>
33 The B<vos dump> command converts the contents of the indicated volume,
34 which can be read/write, read-only or backup, into ASCII format. The
35 Volume Server writes the converted contents to the file named by the
36 B<-file> argument, or to the standard output stream. In the latter case,
37 the output can be directed to a named pipe, which enables interoperation
38 with third-party backup utilities.
40 To dump the complete contents of a volume (create a I<full dump>), omit
41 the B<-time> argument or specify the value C<0> (zero) for it. To create
42 an I<incremental dump>, which includes only the files and directories in
43 the volume that have modification timestamps later than a certain time,
44 specify a date and time as the value for the B<-time> argument.
46 By default, the vos command interpreter consults the Volume Location
47 Database (VLDB) to learn the volume's location, so the B<-server> and
48 B<-partition> arguments are not required. If the B<-id> argument
49 identifies a read-only volume that resides at multiple sites, the command
50 dumps the version from just one of them (normally, the one listed first in
51 the volume's VLDB entry as reported by the B<vos examine> or B<vos
52 listvldb> command). To dump the read-only volume from a particular site,
53 use the B<-server> and B<-partition> arguments to specify the site. To
54 bypass the VLDB lookup entirely, provide a volume ID number (rather than a
55 volume name) as the value for the B<-id> argument, together with the
56 B<-server> and B<-partition> arguments. This makes it possible to dump a
57 volume for which there is no VLDB entry.
59 During the dump operation, the volume is inaccessible both to Cache
60 Managers and to other volume operations. Dumping a volume does not
61 otherwise affect its status on the partition or its VLDB entry.
63 To restore a dumped volume back into AFS, use the B<vos restore> command.
67 Support for incremental dumps is provided to facilitate interoperation
68 with third-party backup utilities. The B<vos dump> command does not
69 provide any of the administrative facilities of an actual backup system,
70 so the administrator must keep manual records of dump times and the
71 relationship between full and incremental dumps of a volume. For a
72 volume's contents to be consistent after restoration of incremental dumps,
73 there must be no gap between the time at which a prior dump of the volume
74 was created and the value of the B<-time> argument to the B<vos dump>
75 command that creates the incremental dump. More specifically, for a
76 read/write volume, the B<-time> argument must specify the time that the
77 prior dump was performed, and for a read-only or backup volume it must
78 specify the time that the volume was last released (using the B<vos
79 release> command) or cloned (using the B<vos backup> or B<vos backupsys>
80 command) prior to dumping it. The parent dump can be either a full dump or
81 another incremental dump.
87 =item B<-id> <I<volume name or ID>>
89 Specifies either the complete name or volume ID number of the read/write,
90 read-only, or backup volume to dump.
92 =item B<-time> <I<dump from time>>
94 Specifies whether the dump is full or incremental. Omit this argument to
95 create a full dump, or provide one of three acceptable values:
101 The value C<0> (zero) to create a full dump.
105 A date in the format I<mm>B</>I<dd>B</>I<yyyy> (month, day and year) to
106 create an incremental dump that includes only files and directories with
107 modification timestamps later than midnight (12:00 a.m.) on the indicated
108 date. Valid values for the year range from C<1970> to C<2037>; higher
109 values are not valid because the latest possible date in the standard UNIX
110 representation is in 2038. The command interpreter automatically reduces
111 later dates to the maximum value. An example is C<01/13/1999>.
115 A date and time in the format B<">I<mm>B</>I<dd>B</>I<yyyy>
116 I<hh>B<:>I<MM>B<"> to create an incremental dump that includes only files
117 and directories with modification timestamps later than the specified date
118 and time. The date format is the same as for a date alone. Express the
119 time as hours and minutes (I<hh>:I<MM>) in 24-hour format (for example,
120 B<20:30> is 8:30 p.m.). Surround the entire expression with double quotes
121 (C<"">) because it contains a space. An example is C<"01/13/1999 22:30">.
125 =item B<-file> <I<dump file>>
127 Specifies the pathname of the file to which to write the dump. The file
128 can be in AFS, but not in the volume being dumped. A partial pathname is
129 interpreted relative to the current working directory. If this argument is
130 omitted, the dump is directed to the standard output stream.
132 =item B<-server> <I<server name>>
134 Specifies the file server machine on which the volume resides. Provide
135 the B<-partition> argument along with this one.
137 =item B<-partition> <I<partition name>>
139 Specifies the partition on which the volume resides. Provide the
140 B<-server> argument along with this one.
144 Normally, B<vos dump> locks the volume and dumps it, which blocks writes
145 to the volume while the dump is in progress. If this flag is given, B<vos
146 dump> will instead clone the volume first (similar to what B<vos move>
147 would do) and then dumps the clone. This can significantly decrease the
148 amount of time the volume is kept locked for dumps of large volumes.
152 By default, B<vos dump> includes all directory objects in an incremental
153 dump whether they've been changed or not. If this option is given,
154 unchanged directories will be omitted. This will reduce the size of the
155 dump and not cause problems if the incremental is restored, as expected,
156 on top of a volume containing the correct directory structure (such as one
157 created by restoring previous full and incremental dumps).
159 =include fragments/vos-common.pod
165 The following command writes a full dump of the volume C<user.terry> to
166 the file F</afs/example.com/common/dumps/terry.dump>.
168 % vos dump -id user.terry -time 0 -file /afs/example.com/common/dumps/terry.dump
170 The following command writes an incremental dump of the volume
171 C<user.smith> to the file C<smith.990131.dump> in the current working
172 directory. Only those files in the volume with modification time stamps
173 later than 6:00 p.m. on 31 January 1999 are included in the dump.
175 % vos dump -id user.smith -time "01/31/1999 18:00" -file smith.990131.dump
177 =head1 PRIVILEGE REQUIRED
179 The issuer must be listed in the F</usr/afs/etc/UserList> file on the
180 machine specified with the B<-server> argument and on each database server
181 machine. If the B<-localauth> flag is included, the issuer must instead be
182 logged on to a server machine as the local superuser C<root>.
184 If the B<-file> argument is included, the issuer must also have permission
185 to insert and write in the directory that houses the file.
197 IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved.
199 This documentation is covered by the IBM Public License Version 1.0. It was
200 converted from HTML to POD by software written by Chas Williams and Russ
201 Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.