""DRBD is a block device which is designed to build high availability clusters. This is done by mirroring a whole block device via (a dedicated) network. You could see it as a network raid-1.
メモメモ。
nbd + device-mapper みたいな感じだけど、
drbd だと 8.0 から Active - Active が出来るようなので、
ocfs2 とか gfs と組み合わせると良い感じかも。
でもパット見 ocfs2 over iSCSI + heartbeat + drbd の方がお勧めっぽい。
でもそれだと nbd + device-mapper と一緒だよな・・・
Xen with DRBD, GNBD and OCFS2 HOWTO
http://xenamo.sourceforge.net/
""This HOWTO covers a Xen setup that allows the live migration of virtual machines (domU's) from one physical machine to another. The easier but far more expensive way to achieve this would be to get a SAN and some fibre channel attached hosts. But this setup allows you to build your own redundant storage network with common PC hardware.
メモメモ。
というか gfs って loop device に使えないのね。
SCSI な lock 使ってるのかしら。
