Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Mon, 2010-05-03 at 14:02 -0400, Ben Timby wrote: > Pri/pri would only work if you use a clustered file system such as > OCFS on your root device. Probably NOT what you are looking for. correct. I don't want that !... :) > > The difficulty in using DRBD on the root (of course it is possible) "of course it is possible" ... the magic words :) thx for saying them :) > is > that the initial ramdisk must contain all drivers necessary for > mounting the root partition. Thus, the initrd must be able to bring up > the underlying block device, then bring up drbd, pivot to it, and then > continue the boot process. Ok. I got this. seems reasonable... > The other issue, as already mentioned is > the secondary machine. It cannot mount the drbd device as it's root > partition, correct. It will have to mount it's own root somewhere else... it will need to "assume a diferent personality" while in Secondary mode > thus failing over to that machine would not be easy > (possible?) without rebooting. Yes. possibly... > Use UnionFS along with another read only root device to provide a > read/write root device. Both systems are able to boot using just a > read only device, you then layer in a ramdisk in for writes (log files > etc) on the secondary machine. Primary machine layers DRBD for writes. > Replace that ramdisk with the DRBD device when you need to fail over. thx a lot Ben. you really hit my problem... I'll keep working on it. thank you everyone ! Joao