Lars,
Thanks for the info. It makes sense that you can have an Active - Active
on the top layer, but not on the bottom two layers. It wasn't
immediately obvious in the documentation.
Currently, I'm just investigating into what DRBD can do, so I don't have
a particular implementation in mind yet.
Thanks,
Kim
On 01/05/2012 05:50 AM, Lars Ellenberg wrote:
On Wed, Jan 04, 2012 at 04:17:27PM -0700, Kim Ebert wrote:
Is it possible to have an active active configuration using stacked
resources?
This wasn't clear to me in the documentation.
Something like,
Node A Active \
Node B / R0
Node C Active \
Node D / R1
R0 Active \
R1 Active / R2
Access stacked resource at R2.
Works, but, as always, with dual primary,
you have to get the fencing and stonith right!
[pri]<----> [pri]
| |
v v
[sec]<----- [pri] [pri] -----> [sec]
Depending on your requirements,
the latency behaviour will look bad, though.
Does not work:
[pri]<----> [pri]
| |
v v
[pri]<----> [pri] [pri]<----> [pri]
As changes originating on the leaves
can not travel to the other end.
What would you like to do?
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