Ah great, that makes a lot of sense. Thanks for the clarification.
On 14/07/07, River Tarnell river@wikimedia.org wrote:
Sean Whitton:
Yeah, the new thing looks cool. The thing I am missing is that with the sql-* aliases we have more aliases than servers, which seems kinda pointless.
this is because these sets are decided by the database layout at Wikimedia's cluster, not us. Wikimedia has three separate master/slave groups, s1, s2, and s3 (there's also s2a and s3a, but those don't matter to us).
we don't need that much capacity, so s1 and s3 are both on yarrow. but, if you use sql-s1 and sql-s3 properly, your code will still work if we add a third server in future.
- river.
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