I am doing POC on Posgtresql replication. I am using latest version of postgresql i.e. 9.1. There are multiple replication solutions avaliable in the market (PGCluster, Pgpool-II, Slony-I). Postgresql also provide in-built replication solutions (Streaming replication, Warm Standby and hot standby). I am confused which solution is best for the financial application for which I am doing POC. The application will write around 160 million records with row size of 2.5 KB in database. My questions is for following scenarios which replication solution will be suitable:
If I would require replication for backup purpose only
If I would require to scale the reads
If I would require High Avaliability and Consistency
Also It will be very helpful if you can share the perfomance or experience with postgresql replication solutions.
Thanks
