LD> Date: Tue, 25 Apr 2006 09:43:51 +1000
LD> From: Lincoln Dale
LD> I suggest you talk to some of the folks you work with
that have to
LD> deal with synchronous replication.
LD>
LD> In the world of storage networking & synchronous
I/O, typically
LD> anything higher than 1 msec round-trip latency is too
high.
This is a big can of worms that's probably OT for NANOG --
not to
mention likely outside most readers' realm of experience.
It _is_ an
interesting field, though. I recommend the Morgan Kauffman
book series
as a good introduction.
One also could argue the necessity and sufficiency of
synchronous I/O in
and of itself. There's a good deal of work, both published
and strictly
"in the lab" dealing with transactional commit
mechanisms.
Eddy
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