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> you need to use EIBs for your database servers "EIBs"? I would point out that global replication is one of the things that makes CouchDB's master-master rep

by rkalla 15y ago

> you need to use EIBs for your database servers "EIBs"? I would point out that global replication is one of the things that makes CouchDB's master-master replication so tasty. You can't accomplish the same thing with Mongo in a R/W environment since you can only write to the master in a replica set. You could have multiple read-only slaves in other geographical locations, but that isn't always helpful. You can also somewhat fake it with a much more complex mongo-replica-set-per-region sharding configuration, but then you don't have the same data available in each region in each replica set. PostgreSQL in 9.1 added master/master streaming replication which is nice. Not sure what MySQL does in these situations.

zwily 15y ago
Postgres' built-in streaming replication isn't master/master. That'd be nice though. :)
- rkalla 15y ago
  Bah, good catch. Sorry about the mis-statement. For anyone interested here are some replication solutions for PostgreSQL that might be interesting: http://wiki.postgresql.org/wiki/Replication,_Clustering,_and_Connection_Pooling http://wiki.postgresql.org/wiki/Replication,_Clustering,_and...
ericHosick 15y ago
Doh. EIP. Elastic IPs.
- rkalla 15y ago
  Ah, got it! This is one of the biggest failings of SimpleDB that I think keeps it held back from being a huge success, the region dependency of it and the seeming lack of support from Amazon (the only product whose forums frequently go a week without a reply). Had SimpleDB has an optional global redundancy for quick read/writes in all locations, I think it would have been the killer product a lot of people were looking for. Instead I have to roll my own with a fully connected CouchDB graph of servers. Ahh well.