4 People who want to tinker with xseg internals, and need a quick-n-dirty intro
5 to the basics behind its operation.
10 Client, server, peer, xsegbd, vlmc, map, request, segment, signal, wait...
15 The initiator/client... then...
17 * Load the modules, mknod, create segment
18 - insmod lib/kernel/xseg.ko
19 - insmod lib/kernel/segdev.ko
20 - mknod /dev/segdev c 60 0
21 - insmod lib/kernel/xseg_segdev.ko
22 - insmod lib/kernel/xseg_posix.ko
23 - ./peer/users/xseg segdev:xsegbd:16:4096:64:1024:12 create
24 - insmod lib/kernel/xsegbd.ko
26 * Verify that the segment was created successfully:
27 - ./peer/users/xseg segdev:xsegbd reportall
29 * Allocate request for vlmcd:
30 - ./peer/users/xseg segdev:xsegbd 0:1 alloc_requests 1024
32 * Run vlmcd/mapperd/filed:
33 - ./peer/users/filed /srv/archip/images -p 9 -g segdev:xsegbd
34 - ./peer/users/mapperd[.py] -p 10 -g segdev:xsegbd
35 - ./peer/users/vlmcd -p 0 -g segdev:xsegbd -b 9 -m 10
37 * Create/List/Map/Unmap/Remove a volume:
38 - vlmc create test -s 4096
40 - echo "test 1:0:1024" > /sys/bus/xsegbd/add
41 (vlmc map test might work as long as vlmcd runs on port 0, and port 1-2-n, where n the no of volumes mapped are free)
43 - echo 0 > /sys/bus/xsegbd/remove (or vlmc unmap /dev/xsegbd0)