On Feb 9, 2009, at 1:03 PM, Romi Verma wrote:
On Mon, Feb 9, 2009 at 5:01 PM, Andrew Beekhof <beek...@gmail.com>
wrote:
On Feb 9, 2009, at 12:25 PM, Romi Verma wrote:
On Mon, Feb 9, 2009 at 4:04 PM, Andrew Beekhof <beek...@gmail.com>
wrote:
On Feb 9, 2009, at 11:21 AM, Dejan Muhamedagic wrote:
On Mon, Feb 09, 2009 at 03:09:40PM +0530, Romi Verma wrote:
sorry to interrupt in between. just one question from my side. if
no-quorum-policy is set to freeze then resource is not supposed to
stop .
right.
in
that case node will not be fenced right??
no-quorum-policy has nothing to do with fencing.
well, depending on what it's set to, it can prevent fencing (no-
quorum-policy != ignore) or cause it to be initiated when quorum is
lost (no-quorum-policy == suicide)
but if you're using freeze, and a resource must stop for other
reasons but fails to, then the node will not be shot (although it
probably should be).
Thanks Andrew,
in case of more then 2 nodes we cant use no-quorum-policy to
"ignore" as we cant just ignore quourum. as you said in case of
freeze node will not be fenced.
right, but thats a good thing.
It only applies if you have an even split (ie. 2-2) where no-one has
quorum.
you only want to fence if you plan on taking over the other side's
resources - which freeze wont do.
if you get a 3-1 split, then the side that has quorum _will_ shoot
the 1 node and take over its resources.
ook wow, it means if i have set no-quorum-policy to "ignore" it can
be used in more than 2 nodes also.
if it is 2-2 split then both partitons will try to stonith each
other (.to get rid of this as you said we have to set stonith-
action=powerfail or will not have to remove openais from startup
service so that it cant get executed once the node comes up.)
and if we get 3-1 spilit then automatically the partion having 3
nodes will stonith the 1 node.
almost, if you use ignore, the 1 will also try to shoot the 3.
this is why freeze is safer, it:
* keeps running anything it can
* doesn't start anything belonging to the other partition unless it
has quorum
* won't try to shoot the other side except if it has majority
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