Re: RAC/OPS changes

Well you asked for this. Don't read this if you are faint of heart and weak of mind.

Oracle9i Real Application Clusters is the next evolutionary step up from Oracle Parallel Server, and is the result of more than 6 years of development, 9 patents, and 18 additional patents pending. Oracle9i Real Application Clusters are unique in that they provide:

Out-of-the-box, near-linear scaling transparency

Compatibility with all applications, with no redesign required

Fast growth clusters, the ability to rapidly add nodes and disk

Based on Oracle's Cache Fusion architecture, Oracle9i Real Application Clusters provide transparent application scalability by quickly and efficiently sharing frequently accessed data across all the servers in a cluster, resolving all manners of contention between servers in the process.

In the Cache Fusion architecture, read requests may be served by any of the memory caches in the cluster database. In cases where data is being updated, coordination between the caches of each server becomes necessary so that both the data being read and the data being updated are consistent and correct.

If the query request is served by a remote cache, then the block is transferred across the high speed cluster interconnect from one node's cache to another. This "fusing of the caches" happens automatically and is transparent to the application. This transparency is the key technology that provides the fast, efficient scaling of Oracle9i Real Application Clusters.

I warned ya,

Scott

> >[via Oracle-L digest]
> > From: "Don Granaman" <granaman_at_home.com>
> > Date: Wed, 25 Jul 2001 22:29:47 -0500
> > Subject: Re: (Fwd) Re: Oracle 8i and clustering
> >
> > I don't know exactly the context in which you heard this (NT
> > cluster specific?),
>
> Don,
>
> Probably just my bad paraphrase of a dim recollection of a
> fast/careless read of previous comments on the list.
>
> Can you give a brief explanation of what will be new/changed
> in RAC, and what it means?
>
> thanks,
> ep
>
>
> >...but rest assured that OPS is not going to be
> > "replaced", except in name. The current party line is that "real
> > application clusters" is a radical departure from OPS. It simply
> > isn't true. RAC is a very major upgrade/rewrite and renaming of
> > OPS, not a different technology. There seems to be a *LOT* of
> > misinformation floating around on this issue and much of it seems
> > be coming from Oracle's marketing machine.
> >
> >-Don Granaman
> >[certifiable OPS OraSaurus]
> >
>
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> Author: Eric D. Pierce
> INET: PierceED_at_csus.edu
>
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