March 2008
Intermediate to advanced
326 pages
10h 22m
English
book
SAN Volume Controller: Best Practices and Performance Guidelines
by Jon Tate, Deon George, Thorsten Hoss, Ronda Hruby, Ian MacQuarrie, Barry Mellish, Peter Mescher
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Chapter 2.4. Cluster upgrade
Page 30
30 SAN Volume Controller: Best Practices and Performance Guidelines The cache component periodically reclaims resources used to cache blocks so that it can cache different blocks. The cache component uses a least recently used ( LRU) policy for selecting those blocks that it will no longer cache. However, the cache component will not be able to reclaim resources when the cache is full of pinned data. Pinned data is modified data for an offline VDisk, that is, it cannot be destaged, because the back- end disks are unavailable for I/ O. For this reason, the cache component reserves a set of “ short- term” resources that are not used to cache. The cache can use these resources to synchronously complete any read ...
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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.