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What if the real servers were also configured to be part of an HA
cluster like SGI Failsafe or MC/ServiceGuard (from HP)? Put the real
servers into a highly available configuration (probably with shared
storage), then use the director to load balance connections to the
virtual IP addresses of the HA cluster. Then you have a system that
parallelises the database and load balances the connections. This might
require ORACLE Open Parallel Server (OPS) edition of the database, you'd
have to check.
Regards,
--
Malcolm Cowe.
IT | Technical Computing, Telephone: +44 131 331 6466
Agilent Technologies Ltd. Telnet: 313-3466
Wayne wrote:
>
> The critical thing is the Oracle database servers must
> share one "single" log file. The actual transaction log
> maybe more than one, but all the Oracle servers can
> only use same ones, otherwise the transactions will be
> out of sync. I have not talked to Oracle about this kind of
> thing for over a year, but a year ago, Oracle told
> everyone to use one large database server instead of
> number of them, simply due to the transaction log issue.
> They may well have changed that.
>
> At 08:34 AM 4/12/2002 +1000, jlobascher@xxxxxxxxxxxxx wrote:
> >Fred;
> >
> >A good starting point is the HOWTO's
> >http://www.linuxvirtualserver.org/Joseph.Mack/mini-HOWTO/LVS-mini-HOWTO.
> >html
> >
> >http://www.linuxvirtualserver.org/Joseph.Mack/HOWTO/LVS-HOWTO.html
> >
> >I found that after setting up the simple LVS's in the mini-HOWTO I had
> >my head around the principles involved - and from there it is easy to
> >move to more complicated scenarios.
> >
> >As for "Is this possible" - definately - database comms run on known
> >ports that can be redirected by LVS, what I would be mindful of is your
> >databases are going to need to stay conncurrent (all have identical
> >data) - using shared storage would be a good way to do this (if
> >possible) or Oracle has its own update system.
> >
> >jeremy
> >
> >Jeremy Lobascher
> >Network Administrator
> >Touchcorp Ltd
> >Telephone: +61 3 9635 2621
> >Mobile: +61 438 639 539
> >Fax: +61 3 9635 2699
> >www.touchcorp.com
> >
> >
> >
> >-----Original Message-----
> >From: fred@xxxxxxxxxxxxxxxxxxxxx [mailto:fred@xxxxxxxxxxxxxxxxxxxxx]
> >Sent: Friday, 12 April 2002 4:13 AM
> >To: lvs-users@xxxxxxxxxxxxxxxxxxxxxx
> >Subject: LVS Newbie
> >
> >
> >Hello Dear Friends,
> >
> >I am a newbie in this LVS thing and I would like some help to enlighten
> >my path in this whole new brave beautil world.
> >
> >My boss is trying to implement an LVS system with one director and 3
> >servers, all of them with oracle databases. He whises to read AND write
> >in this databases thru the director using the LVS.. Is thsis
> >possible???? HOW?????
> >
> >TIA
> >
> >FRED
> >
> >--
> >Frederico Jesus da Costa
> >Analista de Suporte - Linux Solutions - http://www.linuxsolutions.com.br
> >O maior conteúdo de Linux em língua portuguesa - OLinux -
> >http://www.olinux.com.br
> >(21) 2526-7262 ramal 29
> >
> >_______________________________________________
> >LinuxVirtualServer.org mailing list - lvs-users@xxxxxxxxxxxxxxxxxxxxxx
> >Send requests to lvs-users-request@xxxxxxxxxxxxxxxxxxxxxx
> >or go to http://www.in-addr.de/mailman/listinfo/lvs-users
> >
>
> _______________________________________________
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