Re: Sync Rep Design - Mailing list pgsql-hackers

From Josh Berkus
Subject Re: Sync Rep Design
Date
Msg-id 4D2366CE.1010705@agliodbs.com
Whole thread Raw
In response to Re: Sync Rep Design  (Simon Riggs <simon@2ndQuadrant.com>)
Responses Re: Sync Rep Design  (Simon Riggs <simon@2ndQuadrant.com>)
List pgsql-hackers
All,

This is a pointless argument.

Eventually, we will be implementing all possible sync rep
configurations, because different users *need* different configurations.Some users care more about durability, some
moreabout availability,
 
and some more about response time.  And you can't have all three, which
was my point about A,D,R (also the point of CAP).

For that matter, any single configuration will be useful to a large
number of users, and an even larger number will be able to "work around"
while they wait for 9.2.  Further, the knowledge we gain by having some
kind of synch rep in the field will allow us to implement the different
configurations correctly, which *no* amount of arguing on e-mail will.

The perfect is the enemy of the good.

The relevant question is: which configuration(s) can we have ready for
the next CommitFest and alpha release?

--                                  -- Josh Berkus                                    PostgreSQL Experts Inc.
                        http://www.pgexperts.com
 


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