Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
I'm testing a 2 node primary/primary drbd setup but had a few concerns related to the use of md for raid0 striping. The setup is as follows: Each node runs two drbd devices in a primary/primary setup. These devices are then striped using the mdadm utility. From there, logical volumes are setup using LVM (I'm running ais + clvmd to sync the nodes). The following output should explain most of this (identical on node00 and node01): root at node00:~# cat /proc/mdstat Personalities : [raid0] md0 : active raid0 drbd1 drbd0 117190272 blocks 64k chunks root at node00:~# pvs -a PV VG Fmt Attr PSize PFree /dev/md0 san0 lvm2 a- 111.76G 31.76G From there, logical volumes are created and shared via iscsi. Doing round-robin tests on iscsi has not shown any corruption yet (this means i'm reading/writing to both node00 and node01). My main concern is the striping portion and what is actually going on there. I also tested the striping using only LVM - this appears to work fine too. I realize there are a lot of components to this and it may not be appropriate for the DRBD mailing list - if so, just tell me to go away :) Any thoughts appreciated! -- Matth