Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Thu, Aug 21, 2008 at 05:59:47PM +0300, Alex wrote: > Hello drbd experts, > > I have drbd-8.2.6 working fine in dual-primary mode, mirroring 2 nodes. > > According to drbd howto > (http://www.drbd.org/users-guide-emb/s-gfs-create.html) i saw that since DRBD > does not support more than two nodes i can't format /dev/drbd0 using more > then 2 journals (2 nodes): mkfs -t gfs -p lock_dlm -j 2 /dev/drbd0 and MOUNT > IT on more then 2 nodes. > > Now, supposing that: > - i have 4 machines grouped two by two in order to get two different drbd > devices /dev/drbd0 and /dev/drbd1 > - i am exporting /dev/drbd0 and /dev/drbd1 using iSCSI to the 5th macine > - on the 5th machine, i am using lvm to join /dev/drbd{0,1} in one volume > pvcreate /dev/drbd0 /dev/drbd1 > vgcreate myvg /dev/drbd0 /dev/drbd1 > lvcreate ... mylv myvg -> will result logical volume /dev/myvg/mylv > > Let say that /dev/myvg/mylv is exported now to another 3 nodes (again, via > iscsi for example). > > Question: > > Can i use now mkfs.gfs -p lock_dlm -j 3 /dev/myvg/mylv in order to have GFS on > top WITH 3 JOURNALS and of course to write on it from those 3 MACHINES AT THE > SAME TIME? If not, is any other way to achieve -j 3 ...? keep it simple. how about [as many iSCSI initiator clients as you want, ] [ all accessing the same iSCSI target formatted as GFS ] // .-----------------------,,-----------------------------. | | | iSCSI target cluster (SAN replacement) | | in "simple" "standard" failover configuration | | [drbd node a]-=-=-replication link-=-=-[drbd node b] | `------------------------------------------------------' -- : Lars Ellenberg : LINBIT HA-Solutions GmbH : DRBD®/HA support and consulting http://www.linbit.com DRBD® and LINBIT® are registered trademarks of LINBIT Information Technologies GmbH __ please don't Cc me, but send to list -- I'm subscribed