Thread: Is PostgreSQL cluster capable?
Can two postgresql processes (running in different machines) access and work with the same database files in a shared storage scenario? Would there be any problem? Thanks in advance :)
On 18 Jul 2003 at 11:35, Jordi Sánchez López wrote: > Can two postgresql processes (running in different machines) access and > work with the same database files in a shared storage scenario? Would > there be any problem? No. Don't attempt it. It will cause data corruption. Bye Shridhar -- Guillotine, n.: A French chopping center.
On Fri, Jul 18, 2003 at 11:35:19AM +0200, Jordi S?nchez L?pez wrote:
> Can two postgresql processes (running in different machines) access and
> work with the same database files in a shared storage scenario? Would
No.
> there be any problem?
Yes. Probably massive database corruption.
A
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Andrew Sullivan 204-4141 Yonge Street
Liberty RMS Toronto, Ontario Canada
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Has anyone tried PostgreSQL in a MOSIX-like cluster? Jon On Fri, 18 Jul 2003, [ISO-8859-1] Jordi S�nchez L�pez wrote: > Can two postgresql processes (running in different machines) access and > work with the same database files in a shared storage scenario? Would > there be any problem? > > Thanks in advance :) > > > > > > ---------------------------(end of broadcast)--------------------------- > TIP 3: if posting/reading through Usenet, please send an appropriate > subscribe-nomail command to majordomo@postgresql.org so that your > message can get through to the mailing list cleanly >
On Fri, Jul 18, 2003 at 07:02:08AM -0700, Jonathan Bartlett wrote:
> Has anyone tried PostgreSQL in a MOSIX-like cluster?
It won't work, apparently: MOSIX doesn't (last I checked) have a
mechanism for using SYSV-stype shared memory across the cluster, and
PostgreSQL needs it.
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Andrew Sullivan 204-4141 Yonge Street
Liberty RMS Toronto, Ontario Canada
<andrew@libertyrms.info> M2P 2A8
+1 416 646 3304 x110
On Friday 18 July 2003 15:02, Jonathan Bartlett wrote: > Has anyone tried PostgreSQL in a MOSIX-like cluster? Don't think mosix does shared memory (which PG needs) -- Richard Huxton Archonet Ltd
Something that might be fun for someone to try who has some extra time: http://mcaserta.com/maask/ A patch for OpenMosix to allow shared memory migration. Trying this with Postgres might be fun. That is, if you consider playing with alpha software and broken databases fun ;) Jon On Fri, 18 Jul 2003, Richard Huxton wrote: > On Friday 18 July 2003 15:02, Jonathan Bartlett wrote: > > Has anyone tried PostgreSQL in a MOSIX-like cluster? > > Don't think mosix does shared memory (which PG needs) > > -- > Richard Huxton > Archonet Ltd > > ---------------------------(end of broadcast)--------------------------- > TIP 5: Have you checked our extensive FAQ? > > http://www.postgresql.org/docs/faqs/FAQ.html >