August 2011
Intermediate to advanced
576 pages
16h 12m
English
book
Oracle Database 11g Oracle Real Application Clusters Handbook, 2nd Edition, 2nd Edition
by K Gopalakrishnan
Content preview from Oracle Database 11g Oracle Real Application Clusters Handbook, 2nd Edition, 2nd EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Cache Coherency
In cache coherency, the contents of the caches in different nodes are in a well-defined state with respect to each other. Cache coherency identifies the most up-to-date copy of a resource, also called the master copy. In case of node failure, no vital information is lost (such as a committed transaction state) and atomicity is maintained. This requires additional logging or copying of data but is not part of the locking system.
Cache coherency is the mechanism by which multiple copies of an object are kept consistent between Oracle instances. Parallel Cache Management (PCM) ensures that a master copy of a data block is stored in one buffer cache and consistent copies of the block are stored in other buffer caches. The background ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.