Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
I want to have two DRBD primaries. On top of DRBD there will be a LVM. LVM will consist of many logical volumes, and: - the same logical volume will never be accessed concurrently by both DRBD machines, - there will be no LVM metadata changes In other words, this is a DRBD device (let's suppose a "D" as a small part of a DRBD device): DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD The first machine will only write to areas on DRBD device marked by "1": DD11111111D11111DDDDDDDDDDDDDDDDDDDDD The second machine will only write to areas on DRBD device marked by "2": 22DDDDDDDDDDDDDDDD2222222222222DDDDDD What will happen after a longer disconnection (say, one day, both machines do lots of writes, but never to the same place)? Will they sync properly, and everything will play well? Or perhaps it will be a split-brain, as LVM block size does not match DRBD block size, they may overlap, and the things will break? -- Tomasz Chmielewski http://wpkg.org