[DRBD-user] DRBD or not DRBD ?

Miles Fidelman mfidelman at meetinghouse.net
Mon Apr 25 18:10:43 CEST 2011

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.


Dennis Jacobfeuerborn wrote:
> Why do you need a P/P configuration for live migration? From what I 
> understand the VM state will be migrated from the source host to the 
> target host and then the storage will be unmounted on the source and 
> mounted again on the target. That should make the specific 
> configuration of the storage irrelevant as long as it is remotely 
> mountable from both hosts.

There's a step in the Xen handoff process where both VMs (or maybe it's 
both hypervisors) need access to the disk.  It's documented in here: 
http://www.drbd.org/users-guide-emb/ch-xen.html - no details as to why, 
though.


-- 
In theory, there is no difference between theory and practice.
In<fnord>  practice, there is.   .... Yogi Berra





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