ref: 65337bec22bb587facaf032feac39a8beb2a09cd
dir: /sys/lib/backup/restore/
#!/bin/rc # restore arena# [dev] - load venti with arenas on dev, stored one per track # starting with arena#. must have run fmtarenas before restoring # the first arena in the partition. # this must be run on the venti server, without venti running on the # affected arena partition(s). rfork ne if (test -e /sys/lib/backup/funcs) . /sys/lib/backup/funcs switch ($#*) { case 1 case 2 rdev=$2 case * echo usage: $0 arena-num '[dev]' >[1=2] exit usage } starena=$1 if (! ~ $starena [0-9] [0-9][0-9] [0-9][0-9][0-9]) { echo $0: bad starting arena: $starena >[1=2] exit bad-arena-num } # clear any dregs from a previous run unmount /mnt/cd >[2]/dev/null sleep 1 kill cdfs | rc sleep 1 cdfs -d $rdev || exit cd /mnt/cd #for (track in d[0-9]*) # venti/wrarena $track # slow; takes about 12½ mins. per GB arena = $starena # set arenabase for arenastart arenabase = `{ venti/printarenapart $arenas | sed -e 's/.*arenabase=//' -e 1q } kill printarenapart | rc # printarenapart leaves a process behind # echo arenabase $arenabase skipping=yes for (track in d[0-9]*) { if (~ track 'd[0-9]*') { echo $0: no tracks in /mnt/cd >[1=2] exit no-tracks } if (~ $skipping yes) { # verify that first track is the expected one type=`{file $track} switch ($"type) { case *': venti arena' name=`{ venti/printarena $track >[2=1] | sed -e 's/.*name=([^ =]+).*/\1/' -e 1q } case * name=NOT-A-VENTI-ARENA } kill printarena | rc # printarena leaves a process behind echo -n first track is $"name'; is that right? ' switch (`{read}) { case [yY]* skipping=no case skip skipping=yes case * echo aborting, arena is unchanged. >[1=2] exit 'wrong track' } } if (! ~ $skipping yes) { # copy each track into its slot in the arena partition venti/printarena $track >[2=1] | sed 1q | tr -d '\12' kill printarena | rc # printarena leaves a process behind off = `{arenastart $arena} # echo -n writing $track to $arenas at 8K-block offset $off: sleep 3 echo # argh! something (cdfs?) appends 60K of *stuff* to each # arena on optical disc. restrain dd. count=`{ echo $arenasize/$blocksize | bc } pump -i 1048576 -o 65536 -d 10 <$track | dd -quiet 1 -count $count -bs $blocksize -of $arenas \ -oseek $off arena = `{hoc -e $arena+1} } } # when all done, must run venti/checkarenas, fmtisect, fmtbloom, fmtindex, # and (the big one) venti/buildindex -b /cfg/pie/venti.conf