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Re: Veritas Cluster vs Oracle RAC for HA

From: Prem K Mehrotra <premmehrotra_at_hotmail.com>
Date: 8 Aug 2004 19:32:10 -0700
Message-ID: <43441e77.0408081832.74553083@posting.google.com>


Rodrick Brown <rbrown[@]doitt.nyc.gov> wrote in message news:<2004080800262375249%rbrown_at_doittnycgov>...
> I'm looking into building a new 9i RAC cluster mostly for HA reasons
> and the flexibiltiy that RAC offers instead of the traditional hot
> standby setup I've been doing for years with Veritas Cluster anyone
> have good or bad feed backs when comparing the two ?
>
> 4 Node RAC Cluster vs 2 Node VCS Setup
>
> The setup would be something like
>
> 4 - Sun Fire 280R - Oracle 9i RAC
> vs
> 2 - Sun Fire V880 - VCS Cluster

As for as I know VCS Setup provides only HA but no load balancing, i.e., in a 2 node VCS, only one node will be used for database access. In case, there is problem with that node, VCS clustering will switch to other node (HA) within a short period of time.

In 9i RAC, all the nodes can be used in parallel (load balancing). In case, a node fails, Oracle connections can automatically be switched to remaining working nodes (HA). This is the major advantage RAC has over VCS.

In Order to use 9i RAC, one either needs a clustering file system (CFS) or one uses raw devices. If you decide to use CFS, you can get it from Veritas or from SUN.

Prem Received on Sun Aug 08 2004 - 21:32:10 CDT

Original text of this message

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