| From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | Alvaro Herrera <alvherre(at)atentus(dot)com> |
| Cc: | Neil Conway <neilc(at)samurai(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, bob(at)bob(dot)usuhs(dot)mil, pgsql-general(at)postgresql(dot)org |
| Subject: | Re: cluster replication with intermezzo |
| Date: | 2002-10-01 19:19:58 |
| Message-ID: | 200210011919.g91JJwf12742@candle.pha.pa.us |
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| Lists: | pgsql-general |
Alvaro Herrera wrote:
> On 1 Oct 2002, Neil Conway wrote:
>
> > Speaking of which, I vaguely recall the OpenMOSIX guys talking about
> > possibly implementing clusterable shared memory (i.e. "shared" across
> > machines in a cluster) at some point in the future.
>
> To make PostgreSQL _really_ work in an environment like that, there
> would have to be some way of differentiate "local" shared memory versus
> "remote", because the speed of accessing remote shmem would be much
> lower than local shmem. What would be the gain versus have multi-master
> replication?
>
> ISTM horizontal partitioning of tables can give similar results without
> a so different architecture.
As I remember, to do locking, they transfer the shared memory to the
local machine, then do the locking --- seems kind of slow.
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
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