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Posted by on Apr 29, 2013 in Storage | 0 comments

Pernixdata – The solution to the storage IO bottleneck?

Pernixdata – The solution to the storage IO bottleneck?

With the recent news that the one and only Frank Denneman – VMware’s Senior Architect Technical Marketing – is leaving the company for the relatively unknown start-up “PernixData” it’s bound to raise some eyebrows and get people talking. It certainly caused me to take a closer look at the company and their product. I’ll try to summarize here what it is aiming to accomplish (to the best of my knowledge), and why it is so exciting for us virtualization geeks. Arguably one of the most challenging pieces to get correct in any virtualization design architecture is shared storage. You primarily need to plan for two things: capacity and performance. Capacity is relatively easy, you just need enough space to put stuff. Performance is not so simple. There are many things that come into play. You have to be keenly aware of several factors, including the anticipated read/write workload profile, the limitations of your chosen storage protocol (ISCSI, FCoIP, FC, NFS), the hypervisor-level features you will be employing, the overall...

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Posted by on Apr 24, 2013 in Opinion | 0 comments

Impressions from Silicon Valley

Impressions from Silicon Valley

Last week I spent some time visiting the VMware campus in Palo Alto, California. I can’t discuss the purpose of my visit due to a non-disclosure agreement with VMware, but I believe I can safely comment on my impressions of the company and the staff that I met. Actually I visited several Silicon Valley companies while I was there (Facebook, Google, HP, Apple, to name a few), and it was an eye-opening experience to say the least. But first, lets talk about VMware. This is my first visit to the Palo Alto campus, and I have to say, It is as huge as it is beautiful. It is tucked away up in the rolling foothills surrounding Palo Alto. There are evergreen trees and flowers everywhere. One day I even had to stop the car near the visitors entrance to allow a rather large deer to cross the road in front of me. No joke, the thing was like half the size of my rental Town and Country. I grew...

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Posted by on Apr 24, 2013 in Certification | 0 comments

How to crash-and-burn on the VCAP5-DCD exam – an in-depth guide

How to crash-and-burn on the VCAP5-DCD exam – an in-depth guide

So I sat for the VCAP5-DCD exam yesterday and managed to fail it by just a few points. I want to document my exam experience here to hopefully help anyone else attempting  this certification. First off, just to summarize – this test is composed of 100 questions. Most of these will be multiple choice, there will be several drag-drop questions, and between 5-8 design questions (where you have to read a case study and use the in-exam design tool to create a Visio-like design). Each of the design questions took me about 15-20 minutes each. I had 6 of them on this exam. The exam is about 4 hours, and unless you have had a lot of experience with these types of exams, or maybe you are a 10-year-old Asian prodigy with a Stephen Hawking IQ, every one of those minutes is going to be precious to you. I had 30 seconds left on the clock when I hit “Submit” for the final time. You are given a laminated board and...

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