Hello All,
I tried to setup Remus HA and as part of it, I tried to use DRBD with Protocol D and DRBD resource set as Primary in both servers and with that I end up in locking up of block device and Split brain issues. If I change the DRBD resource to Protocol D with Primary/Secondary or Protocol C with Primary/Primary both the DRBD and Remus work and I am able to test HA. Would like to know importance of the Primary-Primary requirement and whether can I use Primary-Secondary with protocol D?
I referred the installation instruction in http://wiki.xen.org/wiki/Install_Xen_4.1.4_with_Remus_and_DRBD_on_Ubuntu_12.10, and installed drbd-8.3.11 and Xen 4.1.4 in Ubuntu 12.10 with Linux kernel 3.5.0-23.
Thanks
Poorani