Re: Oracle Parallel Server vs RAC

In article <aabhv2$9g4io$1_at_ID-85580.news.dfncis.de>, "Chuck" says...
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>Tell them with OPS they will need to redesign their applications or
>they risk VERY poor performance. With OPS your app needs to be
>partitioned so that there is little or no pinging (requests for the
>same blocks on more than one node). This is because blocks are passed
>between nodes via physical disk i/o. Each time one node requests a
>block that is already in another nodes cache, there are at least two
>physical I/Oss needed to get it there. RAC however pings blocks over
>the high speed interconnect virtually eliminating any performance
>bottleneck.
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>Unless your application can be partitioned, scalability is nill with
>OPS. With RAC scalability is close to linear and existing
>applications port well just as they are.

having worked on a lot of OPS sites, I can't agree with this statement. Scalability requires work with OPS, but in most cases (heck even with Oracle Apps!) it can be achieved. But I certainly agree it's much easier with RAC!
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>"VijayanK" <vijayank_at_aol.com> wrote in message
>news:20020426080904.12052.00004380_at_mb-ck.aol.com...
>> I don't know if this has been answered before. How easy or
>> difficult it is to install/configure/maintain RAC compared to OPS ?
>> My management wants to stick with 8i and install OPS instead of
>> upgrading to 9i and install RACs. I have heard it is much easier to
>> administer RACs, but I don't have any specific information. Any
>> information will be greatly appreciated.
>>
>> TIA
>Vijay
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HTH. Additions and corrections welcome.

Pete

SELECT standard_disclaimer, witty_remark FROM company_requirements; Received on Fri Apr 26 2002 - 09:24:17 CDT