Archive for March, 2012

Hypervisor is Containership

March 27th, 2012 4 comments

There are a few metaphors that help explain what virtualization is. Some suggested virtualization is like people (virtual machines) sharing a bus (physical machine) for efficiency and consolidation.

While the bus sample well explains the benefit of consolidation. It does not explain well isolation. Here I make up a new one: a hypervisor is like a containership, and a virtual machine is like a container that is stacked on the ship.

Virtualization Matters Except When It Doesn’t

March 26th, 2012 No comments

In my previous post “Physical is New Virtual,” I mentioned that I would talk about when you will need virtualization and when you don’t. This topic could be a little controversial as we at virtualization community all assume that virtualization is the way to go, which is true in general.

There are however use cases in which virtualization doesn’t make much sense. In the following, I will detail some of these use cases and explain why it doesn’t make much sense to use virtualization. Like everything else, virtualization doesn’t fit all.

Easy Switching RDP and PCoIP Protocol with VMware View

March 23rd, 2012 1 comment

I recently use quite a lot of VMware View because my development environment is a VDI desktop. By default, the PCoIP protocol is used and things just work as expected.

As a power user, I didn’t find PCoIP convenient sometimes, especially when copying files between my physical desktop and my virtual desktop. I ended up using a FTP server instead of drag and drop. It worked but not as quite convenient as I expected it to be.

Categories: Virtualization Tags: , , ,

vSphere APIs for Guest Operating System Management: What’s Special and When to Use It?

March 19th, 2012 13 comments

This is a wrap-up post of recent series on vSphere guest operating system management APIs. If you missed them, here are a few links to related posts: [Note: these are not related to the vSphere Guest API.]

How to Upload File to Guest Operating System on VMware

March 12th, 2012 31 comments

My last post explained how to download file from a guest operating system. Naturally this post is about how to upload file. After a quick sample code, I will discuss how to extend the capability of existing APIs that run program inside guest operating system. My next post will wrap up this series of guest related APIs in vSphere API.

Let’s take a look at a sample code: (To run it, first check out the simple prerequisites in a previous post)

How to Download File from Guest Operating System on VMware

March 11th, 2012 22 comments

In my last few posts I discussed how to use the Guest Operating System Management API to run program, set/read environment variables. From this post, I will talk about how to move files to and from a Guest Operating System, and advanced features like moving whole directory only implemented in the Guest Operating System Management API.

Set Environment Variables in Guest Operating System on VMware

March 7th, 2012 No comments

While reading my last post on reading environment variables from a guest operating system, you may wonder how to set environment variables. Don’t be disappointed if I tell you that there is NO direct support for setting an environment variable.

However, you have a workaround – use a command directly. Unlike reading variables, there is no standard ways to do it for different operating systems. You have to first figure out what type of operating system and then run different commands. For example, if you are targeting Windows family of operating systems, you simply run the following:

Read Environment Variables in Guest Operating System on VMware

March 6th, 2012 12 comments

My last post explained how to run, kill, and list programs in guest operating system on VMware. In that post, I mentioned that you can actually use the same API, GuestProgramDirector in particular, to read environment variables. I think the explanation is detailed enough for an implementation.

Still, a good sample provides more details. That is why I decided to write a quick sample just to show how to read environment variables. While trying the sample by myself, I did find more that I will discuss after the sample code.

Run, Kill, and List Programs in Guest Operating System on VMware

March 5th, 2012 25 comments

In my last article, I announced the Guest Operating System Management API for vSphere. As promised, I will write samples to show how to use the APIs. This post explains the GuestProgramDirector type with an example.

Let’s take a quick look at the following sample:

Announcing Guest Operating System Management API for vSphere

March 5th, 2012 13 comments

Having created a sample to run a program in guest operating system using GuestProgramManager, I started to write a similar one to show how to use the GuestFileManager. Compared with the GuestProgramManager, the GuestFileManager is much more complicated to use.

Java Code Style and Formatter

March 2nd, 2012 No comments

While writing samples for my book VMware VI and vSphere SDK, I developed a Java code formatter within Eclipse. Although there are several built-in formatters like Java conventions, Eclipse, and Eclipse 2.1, I still decided to create my own partially due to the special requirements by Prentice Hall, but mostly due to my personal flavor for Java code.