>Hi, > >I am currently investigating the preferred method of clustering a postgresql >database on Redhat? > >i would really appreciate some suggestions or experiences you guys have had. > >note: performance & redundancy are both equally desirable and i have plenty of >resources. > >we already have licences for Redhat Enterprise Linux ES v4, i was wondering if >Redhat's >Cluster Manager is a candidate? ~ or if either PGCluster or Slony1 >have >advantages or drawbacks etc.
Couple of months ago, when I started looking at replication, and clustering I saw this as a fairly basic question, but the more I got into it the more I realized there's clustering, clustering and clustering, and replication, replication and replication. I dont think anyone can give you a prefered method, not without a system spec. I looked at Slony, even tried to help debug it on windows, and eventually realised its Master Slave arrangement would not work for me. I looked at dBMirror, which I liked in concept but I didnt fancy the way the code was done in a project that seems to be dead. Then I looked at some really weird and wonderful schemes that work on a core technology like a reliable message queue, not for me. In the end I decided I wanted real time synchronous multi master replication, without conflict resolution, and that I didnt really want a dBCluster, I needed to cluster and load balance at web level, allowing for things like session management, multiple clusters, and remote sites. Bad news is I couldnt find it, not for free anyway. If you dont find a solution, try http://spar.orgfree.com/index.html Please keep in mind, its new and written by a novice out of desparation, not one of the community super geeks, but it takes a very pragmatic approach to replication and maybe just what the doctor ordered.... Good Luck.
