OpenStack: 7 Core Projects You Should Know

November 18th, 2012 5 comments

Last week I took a two day boot camp on OpenStack, which is increasingly popular these days. The project was initially created at Rackspace in answering Amazon Web Services, and open sourced to the community.

Not only service providers and software vendors showed interests in the project, but also hardware vendors tried to pre-install OpenStack as one of key differentiators (inside most, if not all, of hardware boxes are Intel therefore not much difference).

Must-Have Tool: ZoomIt for Technical Presenters

November 14th, 2012 4 comments

In one of my previous posts, I introduced the Remote Desktop Connection Manager. Here is yet another must-have tool: ZoomIt. If you frequently present technical contents on Windows, you will find it very useful, especially when you want to show source code or screen details to your audience.

I’ve found many cases in which presenters had trouble to walk through source code because the font was too small for audience to see clearly. Instead of using this tool, they often tried to change IDE editor settings for a larger font, which worked but not nearly convenient.

Categories: Others Tags: ,

Encrypt and Decrypt Password in C#?

November 12th, 2012 2 comments

I just spent a little time playing with C# on password encryption. Here is a sample code I wrote to get myself familiar with related APIs. Overall it’s pretty straight forward – it first encrypts a clear text to an encrypted Base64 encoded string, then reverses it.

Must-Have Tool: Remote Desktop Connection Manager

November 7th, 2012 12 comments

I think most of us have used Microsoft Remote Desktop Connection (mstsc.exe), which is used to connect to a remote server using RDP protocol. If you have more than several remote servers to connect, it can be very inconvenient to navigator through them. Microsoft knew that and created a new tool called Remote Desktop Connection Manager. You can download it for free at Microsoft site here.

Conceptual Deep Dive in VMware vCenter Single Sign On

November 4th, 2012 3 comments

One of the key new features in vSphere 5.1 is the Single Sign On. Because it’s new and also complicated, I’ve heard it’s not easy to get it right the first time. Experts recommend that you should play with it in a test or staging environment before upgrading your production environment.

What’s New in vSphere 5.1 SDK and APIs

October 31st, 2012 2 comments

I know it’s well past the GA date of the product on September 10, but I still decide to write this what’s new for the completeness of vSphere SDK FAQs.

As I always emphasize, the SDK/APIs are “view” to the product (you can think it as “model” here). Therefore to understand a SDK/APIs, it’s important to check out the product first. No exception for the new features: what’s new in vSphere decides what’s new in vSphere SDK/APIs. For that, you want to check out the What’s New in VMware vSphere 5.1 at VMware website.

VMware vSphere SDK with Visual Studio 2012

October 30th, 2012 7 comments

While trying latest Microsoft Visual Studio 2012 Express, I also played with the C# samples of the VMware vSphere SDK. Unfortunately, there isn’t direct support for VS 2012 but for VS 2010, 2008, and 2005. However, you can easily create project files for the VS 2012 by yourself assuming you are already familiar with the Visual Studio environment.

The Fifth Bread and the Mobile Computing

October 28th, 2012 2 comments

Once upon a time, there was a gentleman who was very hungry. He bought 5 breads. After finishing the first 4 breads, he still felt hungry. While eating the 5th bread, he found himself full. Then he thought it’s the fifth bread that made him full, and wondered why he had wasted money on the first 4 breads.

Categories: Others Tags: , ,

A Quick Hack With vSphere Web Client Timeout

October 24th, 2012 8 comments

Last week I released a tiny tool called DoubleCloud Client, which eases the usage of vSphere Web Client. I didn’t have time to add another hack which can bypass the session timeout of vSphere Web Client.

By default, vSphere Web Client times out after 30 minutes of inactivity according to VMware Doc. After timing out, you got to re-login and click back to the page you left out. It’s good for the security, but also not convenient. If you use it on your own desktop and have set up screen saver with password protection, you don’t really need this security feature.

Hadoop MapReduce Data Flow

October 22nd, 2012 5 comments

As its name suggests, the Hadoop MapReduce include Map and Reduce in its processing data flow. At its highest level, the MapReduce follows the traditional wisdom “Divide and Conquer” – dividing big data to small data that can be processed by a commodity computer and then pulling the results together.

Categories: Big Data Tags: ,

A Tiny Tool to Ease the Use of VMware vSphere Web Client

October 14th, 2012 11 comments

In my previous article, I talked about why Web is not a good choice as the primary GUI for vSphere. I also mentioned that I was working on Ua small app to enhance the user experience of vSphere Web Client.

Today I am happy to announce a small application I developed recently using latest Visual Studio 2012 Express which is free from Microsoft. Although known with my work on Java in the community, I am pretty open to any programming languages and tools that are best to get work done. This time it happens to be C# and .NET. :-)

Why Web is Not Good as Primary GUI for vSphere

October 9th, 2012 11 comments

I recently started to use the new Flex based vSphere Web Client while working on the open source vijava to support vSphere 5.1. Overall I like the look and feel, and particularly the extensibility story around the new architecture. However, I am not impressed by the performance – I saw way more “loading…” and clock cursor than I expected. Technically, I don’t think that is the direction VMware wants to bet on as the primary user interface for its flagship product vSphere.

Defining Software Defined Data Centers

October 8th, 2012 7 comments

After VMware touting out the new term “software defined data center,” I suddenly saw many vendors claiming they support software defined data center at VMworld. Days ago I read a news about Joe Tucci, the CEO of VMware’s parent company EMC, explaining what “software defined data center” is.

Hadoop File System APIs

October 1st, 2012 1 comment

As mentioned in my previous post on Hadoop File System commands, the commands are built on top of the HDFS APIs. These APIs are defined in the org.apache.hadoop.fs package, including several interfaces and over 20 classes, enums, and exceptions (the number of interfaces and classes varied from release to release).

As always, it’s best to start with a sample code while learning new APIs. The following sample copies a file from local file system to HDFS.

Categories: Big Data Tags: , ,

XML APIs to Manage Cisco Nexus 1000V

September 30th, 2012 5 comments

If you’ve been following my blog, you may remember I wrote Cisco Nexus 1000V in VMware vSphere API about half year ago. The Cisco Nexus 1000V actually has another APIs based on XML. Interestingly, it’s implemented over SSH, but not HTTP or HTTPS.

The Nexus 1000V APIs follows two ITEF standards: RFC 4741 NETCONF Configuration Protocol, and RFC 4742 Using the NETCONF Configuration Protocol over Secure SHell (SSH). The first one is pretty long with close to 100 pages, but fortunately Wikipedia has a much shorter introduction. The RFC 4742 is just 8 pages and pretty easy to browse through.

Categories: Virtualization Tags: ,

Hadoop File System Commands

September 26th, 2012 3 comments

I just took a Hadoop developer training in the week of September 10. To me, Hadoop is not totally new as I’ve tried HelloWorld sample and Serengeti project. Still, I found it’s nice to get away from daily job and go through a series of lectures and hands-on labs in a training setting. Believe it or not, I felt more tired after training than a typical working day. This post is not much new but just helps me on the commands when needed later.

Categories: Big Data Tags: , ,

Announcing Public Beta of VI Java API 5.1 Supporting vSphere 5.1

September 23rd, 2012 6 comments

After VMware released the vSphere 5.1 on the night of September 10, I finally got a chance to look at the new vSphere API, including the API reference and more important to me the WSDL files.

I was relieved to find out that there weren’t many changes. No single managed object is added to the vSphere 5.1 API, meaning a lot less work than I thought for vijava API to support the latest vSphere 5.1.

Categories: vSphere API Tags: ,

Converged Infrastructure and Object Oriented Programming

September 10th, 2012 1 comment

At first sight, these two technologies are totally different and you won’t talk about them together. But looking closely at the philosophies behind them, I find they are surprisingly similar and I hope you would agree with me after reading through this article.

A Quick Overview

Before getting into the detailed analysis, let’s take a quick look at the concepts and histories of both technologies.

Behind vRAM – What’s VMware’s Deepest Fear?

September 5th, 2012 4 comments

The vRAM was the license model VMware used in vSphere 5.0. It basically limits the usage of virtual memory, which is different from physical memory, per license. When first announced last year, it created a lot of angry customers overnight even though VMware estimated that the license scheme wouldn’t affect most of the existing customers. Later on, VMware doubled the amount of virtual memory and implemented a cap per license, and insisted to roll out the modified license model despite strong objections from customers.

My First Try of Hadoop Azure

August 27th, 2012 No comments

During the breaks of my vacation last week, I tried the Technology Preview for the Apache Hadoop-based Service on Windows Azure. The service is not yet publicly available and requiring Microsoft approval. Here is the link that I used to file my application. It took several days for me to get the email with invitation code. Sorry that I cannot include the code here. :-)