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RAC technology

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Shivkumar
Super Advisor

RAC technology

Hi,

Was Oracle RAC (Real Application Cluster) available starting with version 9i of Oracle ?
I mean RAC technology was not available in Oracle 8i.. right ??

Thanks,
Shiv
5 REPLIES
Ivan Ferreira
Honored Contributor

Re: RAC technology

For 8i was called:

Oracle8i Parallel Server (OPS)
Por que hacerlo dificil si es posible hacerlo facil? - Why do it the hard way, when you can do it the easy way?
Hein van den Heuvel
Honored Contributor
Solution

Re: RAC technology

Before 9i Oracle had its 'parallel server' = OPS.

This worked most of the time but needed very careful tuning (gc_lock_to_files) for optimal results and it 'pinged' over the disk subsystem to share data.

With 9i, came RAC and its clame to fame is 'cache fusion'. This is where the Oracle instances will communicate data blocks directly from cache to cache over a cluster interconnect. Supposedly it is also easier to tune, but I suspect that many customers opt for partitioning of data, and didling with gc_file_to_lock after all in order to get decent scaling.

hth,
Hein.
Shivkumar
Super Advisor

Re: RAC technology

Can someone eloborate little more on 'cache fusion' ?
Ivan Ferreira
Honored Contributor

Re: RAC technology

See a description here:

http://www.oracle-base.com/articles/9i/RealApplicationClusters.php
Por que hacerlo dificil si es posible hacerlo facil? - Why do it the hard way, when you can do it the easy way?
Arunvijai_4
Honored Contributor

Re: RAC technology

Hi Shiv,

Cache fusion, find the attachment for more details.

-Arun
"A ship in the harbor is safe, but that is not what ships are built for"