October 2009
Beginner to intermediate
298 pages
7h 11m
English
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Chapter 4. Resource and vCenter Management
Resource management is key in any virtualized environment. In the context of VMware ESX and vSphere, resource management includes clustering, high availability (HA), and the distributed resource scheduler (DRS). This chapter takes a look at the available technologies and how they work together to help you manage your environment effectively. We’ll explore:
- VMware clusters
Clusters within the ESX environment allow you to pool multiple physical ESX hosts to create a virtual pool of resources from the combined resources of all of the ESX hosts. The three main elements of VMware clustering are the DRS, fault tolerance (FT, available in ESX 4.x), and HA pieces.
- VMware HA
This provides you with a cost-effective and intelligent engine that can provide high availability within your ESX cluster. For example, if you have a four-node cluster and one node in the cluster goes down, you can configure HA to automatically start up the virtual machines from the failed node on any remaining node that has available resources.
- VMware DRS
The distributed resource scheduler actively monitors all virtual machines in a cluster and manages their resources. DRS can be configured to provide you, the administrator, with guidelines on which virtual machines can benefit from being moved to another host. You can also configure DRS to automatically take care of the migration through VMotion.
In this chapter we will discuss various aspects of these technologies and how to configure, ...
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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.