Thread

1. Scalability, Clustering

   V. M. <txian@hotmail.com> — 2000-09-09T15:34:52Z

   I've searched Mosix, Dipc, Postgres mailing-lists and used google about the 
   possibility to cluster ,load balance, Postgresql databases.
   
   Mosix isn't good to clucter Postgresql because of shared memory.
   
   Can be Dipc (http://wallybox.cei.net/dipc/) suitable for this task without 
   changing postgres' sources (probably only cpu balancing, no data)?
   
   
   If PostgreSQL Inc. will do a replication server, will be possible?
   
   And Mariposa (http://mariposa.CS.Berkeley.EDU/download.html) ?
   
   My question isn't an academic one, i (probably WE) really need this feature.
   
   thank you in advance for you reply.
   
   valter
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2. Re: Scalability, Clustering

   Tom Samplonius <tom@sdf.com> — 2000-09-09T20:25:22Z

   On Sat, 9 Sep 2000, Valter Mazzola wrote:
   
   > If PostgreSQL Inc. will do a replication server, will be possible?
   > 
   > And Mariposa (http://mariposa.CS.Berkeley.EDU/download.html) ?
   > 
   > My question isn't an academic one, i (probably WE) really need this feature.
   > 
   > thank you in advance for you reply.
   
     Depends on what kind of scalability you need.  Replication does not
   usually equal scalability.
   
     I know that someone was working on a commercial extension to PostgreSQL
   to add clustering based on a shared disk system.  Basically he was added a
   raw storage manager to PostgreSQL plus a lock manager to co-oridinate
   access to the shared disk.  That way the two nodes could co-ordinate
   access to the shared disk.  This is very similar to Oracle Parallel
   Server.
   
     Replication is a different beast.
   
   Tom