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Re: Replication Advise
On Tue, 10 May 2011, Ben Rockwood wrote:
I have a mirror-mode configuration between two nodes in a single data
center now. I'd like to expand this to 2 additional data centers. The
intent would be to have read-only HA pairs in each of the new data
centers that will continue to function even if the data center is cut
off from the primary pair.
I'm not clear as to what you're looking to install in your new locations.
The wording ("read-only HA pairs") implies additional mirrormode
installations, but I don't think that makes sense if you are specifying
read-only capability. If your concern is additional read-only capacity
then you should just be expanding your replica pool, nothing more. This is
true regardless of whether you desire on-site or off-site read-only
Please see the diagram in the Admin Guide, section 220.127.116.11.1. Actually,
if you're revisiting your architecture, rereading the entire chapter may
be in order...