glenda.party
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BACKUP(8)                   System Manager's Manual                  BACKUP(8)



NAME
       backup,  tobackup, dumparenas, restore - backup venti arenas to blu-ray
       discs or restore from them

SYNOPSIS
       backup [ -n ] [ -d dev ] [ -s set ]
       tobackup [ set ]
       dumparenas dev arena ...
       restore arena-# [ dev ]

DESCRIPTION
       These programs reside in /sys/lib/backup and provide a means to  backup
       venti(8) storage to Blu-ray (or other large optical) discs, while keep‐
       ing track of which arenas have been written to which  discs.   Multiple
       backup  sets  are  supported,  as  is  (re)loading a venti store from a
       backup thus made.

       The first time that backup is run, it will dump all sealed  venti  are‐
       nas.   Thereafter,  it will append only those sealed arenas not already
       written to a disc within the given backup set.  The -s  option  uses  a
       backup  set  other  than the default.  The -d option uses a disc burner
       other than the default The -n option goes through the motions but  does
       not burn any tracks on the Blu-ray disc.

       Tobackup prints the names of all the sealed arenas not yet backed up to
       a disc in the current set.

       Dumparenas copies the named arenas, one per track, to the  device  dev,
       which  is  first mounted via cdfs(4).  Venti/rdarena is used to extract
       each arena.

       Tobackup and dumparenas are invoked internally by backup.

       Restore copies each data track (assumed to be a saved arena) on dev (by
       default,  into its appropriate place in the venti arenas partition (lo‐
       cally, /dev/sde0/arenas), thus adding the arena to  the  current  venti
       store.   The  arena  size of the arena partition must match the size of
       the arenas on optical disc (except for ~60K of trailing debris  on  the
       optical disc arenas).

       Arena-# must be the number (starting from zero) of the first arena slot
       in the arenas partition that you wish to restore into from the  current
       optical  disc  (not  necessarily  that of the first arena on the disc).
       Restore will prompt for confirmation that the first arena is  the  cor‐
       rect  one,  after  printing a summary of its arena header.  Typing will
       proceed normally, will abort all processing, and will cause restore  to
       proceed to the next track and ask for confirmation of it.

       The  arenas partition must be formatted (see fmtarenas in venti-fmt(8))
       before restoring into it.  When all the arenas have been  restored,  it
       will  be necessary to build a new venti index, the usual steps being to
       run checkarenas, fmtisect, fmtbloom, fmtindex, and buildindex  -b,  all
       from venti-fmt(8).

FILES
       /sys/lib/backup
              backup scripts and records

       set1   subdirectory containing records for default backup set

       /sys/log
              source of dump scores

SOURCE
       /sys/lib/backup

SEE ALSO
       venti(1), cdfs(4), venti(8), venti-fmt(8), venti-backup(8)
       Venti Backup on Blu-Ray Discs

BUGS
       Assumes  a single arenas partition named Assumes that the file server's
       arenas are accessible on it as



                                                                     BACKUP(8)