[Linux-cluster] Why no node-specific <quorumd>?
Jos Vos
jos at xos.nl
Mon Mar 26 21:25:39 UTC 2007
On Mon, Mar 26, 2007 at 02:00:04PM -0700, Steven Dake wrote:
> I'm not sure why you would want to select one view of a primary
> component (aka quorum membership) with one node, and another primary
> component with another node. Then as the nodes make decisions, they
> would be inconsistent (ie: consider GFS one node would think writes were
> ok, while another may not... shouldn't they agree?).
Maybe one step back to the CMAN algorithm:
I have been looking for a comprehensive summary of the algorithm on
how CMAN determines node failures (heartbeat *AND* quorum disk should
show the node being "up"?) and how votes are calculated. But I could
not find it.
I'm afraid it is not clear what the role the <quorumd> votes play:
are they only calculated on each node or are the votes stored on the
quorum disk and read by other nodes?
--
-- Jos Vos <jos at xos.nl>
-- X/OS Experts in Open Systems BV | Phone: +31 20 6938364
-- Amsterdam, The Netherlands | Fax: +31 20 6948204
More information about the Linux-cluster
mailing list