| |
 |
|
Oracle Tips by Burleson |
Chapter 1 Oracle 10g Grid Computing
Before RAC
Even though Oracle introduced Oracle Parallel
Server (OPS) option with version 6.2, the real usage began with
version 7. The Version 7.34 OPS was generally a stable product, but
needed lots of application planning and partitioned usage.
The biggest performance-robbers in the OPS
architecture was the DB block ping. A DB block ping would occur when
an instance participating in an OPS database had a block in its
cache that another participating instance required. In OPS, if
another instance required the block in the cache of a second
instance, the block would have to be written out to disk, the locks
transferred, and then the block re-read into the requesting
instance.
With OPS, scalability was always an issue. OPS
implementations used to suffer from tedious application design and
coding, database management issues. There were many performance
issues reported. OPS lacked good tools to manage, which used to
frustrate DBA(s) and application users.
For more information,
see the book
Oracle 11g
Grid and Real Application Clusters 30% off if you
buy it directly from Rampant TechPress .
Written by top Oracle
experts, this RAC book has a complete online code depot with
ready to use RAC scripts.
|
Download your Oracle scripts now:
www.oracle-script.com
The
definitive Oracle Script collection for every Oracle professional DBA
|
|
