Ron, This information is incorrect. RAC is available
on there platforms without shared file systems. I have
RAC running on SUN, NT and Linux. All of these
platforms have shared raw devices and are concurrently
accessed. RAC on shared file systems is only supported
on Tru64, OpenVMS and starting in July it will be
supported on Solaris using Veritas's CFS (9iR2+ Only).
Oracle is also developing a CFS that will ship later
this summer or fall that will be supported with 9iR2.
The other thing is that RAC does not support SAN
drives at this time. Only single instance environments
support SAN environments with specific equipment.
Scott
- Ron Rogers <RROGERS_at_galottery.org> wrote:
> Jonathan,
> At the seminars I have attended it was pointed out
> that the :true RAC"
> is COMPAQ only. The seminar was hosted by
> Oracle/Compaq. Compaq RAC
> allows multiple CPU's to mount and use/share the
> same datafiles in a
> true RAC configuration. The drives including the os
> drive are on a SAN
> and shared by the CPU's so knowledge is shared. It
> was pointed out the
> new Linux RAC can only share a RAW device and not a
> datafile. I don't
> know if this is true as I have not tried it yet. The
> speaker at the
> seminar said that with other OS's a RAC is like a
> High Availability (HA)
> option, one CPU is doing nothing until the first one
> fails or you only
> run different applications and datafiles on one CPU
> and other
> applications and datafiles on the second CPU. if one
> fails you have to
> mount the datafiles and switch applications to the
> active CPU.
> To use a true RAC you have to use Compaq and I
> think the market share
> of the OS's are not True64, so there are probably
> not a lot of users of
> RAC.
> Ron
> ROR mª¿ªm
>
> >>> listmail_at_gennick.com 04/17/02 10:18PM >>>
> I was talking w/someone today, and we realized that
> neither
> of us knows of anyone actually using RAC in
> production. So
> now I'm curious. Is anyone?
>
> Jonathan Gennick --- Brighten the corner where you
> are
> mailto:jonathan_at_gennick.com
> http://Gennick.com * http://MichiganWaterfalls.com *
> http://ValleySpur.com
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Received on Thu Apr 18 2002 - 08:59:10 CDT
