# manually recopy the first arena from the first venti to a second venti

# first venti

% dd -if /dev/zero -of arenas1.img -bs 8192 -count 131072
% dd -if /dev/zero -of isect1.img -bs 8192 -count 16384
% dd -if /dev/zero -of bloom1.img -bs 8192 -count 8192
% venti/fmtarenas arenas arenas1.img
% venti/fmtisect isect isect1.img
% venti/fmtbloom bloom1.img
% echo 'index main
    isect isect1.img
    arenas arenas1.img
    bloom bloom1.img' | venti/conf -w arenas1.img
% venti/fmtindex arenas1.img
% venti=127.1
% venti/venti -c arenas1.img -m 20 -h tcp!127.1!8000
% vac /sys/src/9/pc
% hget http://127.1:8000/index
index=main version=1 blocksize=8192 tabsize=524288
    buckets=16287 div=263706
    sect=isect for buckets [0,16287) buckmax=215 arena=arenas0 at index [1048576,537903104)
    arena='arenas0' on arenas1.img at [802816,537673728)
    version=5 created=1327069595 modified=1327069627
    written: clumps=669 compressed clumps=600 data=4,251,763 compressed data=1,174,341 storage=1,216,488
    indexed: clumps=0 compressed clumps=0 data=0 compressed data=0 storage=0
% venti/sync
% kill venti | rc
% bc
802816/8192 = 98
537673728/8192 = 65634
65634-98 = 65536

# second venti

% dd -if /dev/zero -of arenas2.img -bs 8192 -count 65633
% dd -if /dev/zero -of isect2.img -bs 8192 -count 16384
% dd -if /dev/zero -of bloom2.img -bs 8192 -count 8192
% venti/fmtarenas arenas arenas2.img
% venti/fmtisect isect isect2.img
% venti/fmtbloom bloom2.img
% echo 'index main
    isect isect2.img
    arenas arenas2.img
    bloom bloom2.img' | venti/conf -w arenas2.img
% venti/fmtindex arenas2.img
% dd -if arenas2.img -of arenapart -bs 8192 -count 97
% dd -if arenas1.img -of arenas -bs 8192 -iseek 97 -count 65536
% cat arenapart arenas > arenas2.img
% rm -f arenapart arenas
% venti/buildindex -b arenas2.img
0 clumps, 16,287 buckets
2012/0120 14:29:29 read index
venti/buildindex: brand-new index, no work to do
2012/0120 14:29:29 arena arenas0: 669 entries
% venti/venti -c arenas2.img -m 20 -h tcp!127.1!8000
term% hget http://127.1:8000/index
index=main version=1 blocksize=8192 tabsize=524288
    buckets=16287 div=263706
    sect=isect for buckets [0,16287) buckmax=215 arena=arenas0 at index [1048576,537903104)
    arena='arenas0' on arenas2.img at [802816,537673728)
    version=5 created=1327069595 modified=1327069627
    written: clumps=669 compressed clumps=600 data=4,251,763 compressed data=1,174,341 storage=1,216,488
    indexed: clumps=0 compressed clumps=0 data=0 compressed data=0
    storage=0