doc/man-pages/pod1/vos_shadow.pod.in

   1 =head1 NAME
   2
   3 vos_shadow - Creates a shadow copy of a volume on a different server/partition
   4
   5 =head1 SYNOPSIS
   6
   7 =for html
   8 <div class="synopsis">
   9
  10 B<vos shadow> S<<< [B<-id>] <I<volume name or ID on source>> >>>
  11     S<<< [B<-fromserver>] <I<machine name on source>> >>>
  12     S<<< [B<-frompartition>] <I<partition name on source>> >>>
  13     S<<< [B<-toserver>] <I<machine name on destination>> >>>
  14     S<<< [B<-topartition>] <I<partition name on destination>> >>>
  15     S<<< [B<-toname> <I<volume name on destination>>] >>>
  16     S<<< [B<-toid> <I<volume ID on destination>>] >>>
  17     [B<-offline>] [B<-readonly>] [B<-live>] [B<-incremental>]
  18     S<<< [B<-cell> <I<cell name>>] >>>
  19     [B<-noauth>] [B<-localauth>]
  20     [B<-verbose>] [B<-encrypt>] [B<-noresolve>]
  21     S<<< [B<-config> <I<config directory>>] >>>
  22     [B<-help>]
  23
  24 B<vos sh> S<<< [B<-id>] <I<volume name or ID on source>> >>>
  25     S<<< [B<-froms>] <I<machine name on source>> >>>
  26     S<<< [B<-fromp>] <I<partition name on source>> >>>
  27     S<<< [B<-tos>] <I<machine name on destination>> >>>
  28     S<<< [B<-top>] <I<partition name on destination>> >>>
  29     S<<< [B<-ton> <I<volume name on destination>>] >>>
  30     S<<< [B<-toi> <I<volume ID on destination>>] >>>
  31     [B<-o>] [B<-r>] [B<-l>] [B<-in>]
  32     S<<< [B<-c> <I<cell name>>] >>>
  33     [B<-noa>] [B<-lo>] [B<-v>] [B<-e>] [B<-nor>]
  34     S<<< [B<-co> <I<config directory>>] >>>
  35     [B<-h>]
  36
  37 =for html
  38 </div>
  39
  40 =head1 DESCRIPTION
  41
  42 The B<vos shadow> command creates a shadow copy of a volume on a
  43 different partition or server.
  44
  45 A shadow volume is a copy of a volume that does not normally appear in
  46 the volume location database (VLDB). It is a primitive operation that
  47 is meant to be used in backup or disaster recovery situations.
  48
  49 =head1 CAUTIONS
  50
  51 This command is not used during normal OpenAFS administration and may
  52 have adverse effects on the VLDB if not used properly! This command
  53 should only be used by an expert.
  54
  55 Using this command on a volume when the source volume is not the same
  56 as parent volume used to create the shadow will leave the destination
  57 volume in a unknown state.
  58
  59 Running B<vos syncserv> or B<vos syncvldb> on a fileserver containing
  60 shadow volumes will not update the VLDB with the shadowed Read/Write
  61 volumes as long as the entries for the source volumes still exist. In
  62 a disaster recovery situation the VLDB entries for the corresponding
  63 source volumes need hence to be deleted first.
  64
  65 =include fragments/volsize-caution.pod
  66
  67 =head1 OPTIONS
  68
  69 =over 4
  70
  71 =item B<-id> <I<volume name or ID>>
  72
  73 Specifies either the complete name or volume ID number of a read/write
  74 volume.
  75
  76 =item B<-fromserver> <I<machine name for source>>
  77
  78 Identifies the file server machine where the source volume resides. Provide
  79 the machine's IP address or its host name (either fully qualified or using
  80 an unambiguous abbreviation). For details, see L<vos(1)>.
  81
  82 =item B<-frompartition> <I<partition name for source>>
  83
  84 Names the partition where the source volume resides. Provide the full
  85 partition name (for, example, B</vicepa>) or one of the abbreviated forms
  86 described in L<vos(1)>.
  87
  88 =item B<-toserver> <I<machine name for destination>>
  89
  90 Identifies the file server machine to which to copy the volume.  Provide
  91 the machine's IP address or its host name (either fully qualified or using
  92 an unambiguous abbreviation). For details, see L<vos(1)>.
  93
  94 =item B<-topartition> <I<partition name for destination>>
  95
  96 Names the partition to which to copy the volume. Provide the full partition
  97 name (for, example, B</vicepa>) or one of the abbreviated forms described in
  98 L<vos(1)>.
  99
 100 =item B<-toname> <I<volume name for new copy>>
 101
 102 The complete name of the new volume to create.
 103
 104 =item B<-toid> <I<volume ID for new copy>>
 105
 106 The volume ID number to use for the new volume.
 107
 108 =item B<-offline>
 109
 110 Leaves the new volume flagged as off-line in the volume database.
 111
 112 =item B<-readonly>
 113
 114 Flags the new volume as read-only in the volume database.
 115
 116 =item B<-live>
 117
 118 Copies the live volume without cloning.  This is normally not necessary and
 119 causes the volume to be kept locked for longer than the normal copy
 120 mechanism.
 121
 122 =item B<-incremental>
 123
 124 Copy the changes from the source volume to a previously created shadow
 125 volume.
 126
 127 =include fragments/vos-common.pod
 128
 129 =back
 130
 131 =head1 OUTPUT
 132
 133 This command has no output unless C<-verbose> is specified or there is
 134 an error.
 135
 136 =head1 PRIVILEGE REQUIRED
 137
 138 The issuer must be listed in the F</usr/afs/etc/UserList> file on the
 139 machines specified with the B<-toserver> and B<-fromserver> arguments and
 140 on each database server machine.  If the B<-localauth> flag is included,
 141 the issuer must instead be logged on to a server machine as the local
 142 superuser C<root>.
 143
 144 =head1 SEE ALSO
 145
 146 L<vos(1)>,
 147 L<vos_backup(1)>,
 148 L<vos_copy(1)>,
 149 L<vos_move(1)>
 150
 151 L<http://www.openafs.org/pipermail/openafs-info/2005-July/018469.html>
 152 discusses motivation for the creation of this command.
 153
 154 L<http://workshop.openafs.org/afsbpw06/talks/drh.scs.html> discusses
 155 one possible use for it.
 156
 157 =head1 COPYRIGHT
 158
 159 Copyright 2008 Jason Edgecombe <jason@rampaginggeek.com>
 160
 161 This documentation is covered by the BSD License as written in the
 162 doc/LICENSE file. This man page was written by Jason Edgecombe for
 163 OpenAFS.