hi steven,
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Roberto Scattini
> we have two new dell poweredge r720. based on recommendations from this list we have configued the five disks in raid10 + 1 hot spare.You might mention a bit more about how your drives are configured. 5 drives in a RAID1+0 sounds odd to me.
i mean, 4 disks in raid10, plus one disk as hot spare.
also, wasn't this list where recommended this setup, was in debian-user.
>I would not introduce the complexity of having each server be master for half of the data unless you can show that this improves some metric you care a lot about. Any failure or maintenance event will revert you back to the common configuration -- back to having both masters on one system -- until you do another promotion back to the "cross wired" setup. Extra work without a proposed gain.
> now we are looking for advice in the postgres installation for our setup.
>
> we have two databases. one for a lot of small apps and one for one big app with a lot of data and a lot of usage.
> we want to use streaming replication to have a functional copy of databases in a failure.
>
> one of the ideas is to have one database running on each server, and then have another instance of the other database running in streaming replication (i mean, crossed replications).
>
> the other idea is to have both databases running in one server and backup everything in the other with streaming replication.
>
> which alternative would you use?
Plus then you can get away with half as many Postgres installs to maintain.
ok. we thought in this crossed-replication config because one heavy query in one of the databases wouldnt affect the performance of the other.
Roberto Scattini
