Guide to PernixData FVP PowerShell Commands

In the past year PernixData has emerged on the virtual storage scene with their game changing FVP product. FVP utilizes server-side flash drives to create Flash Clusters across a series of vSphere hosts. This works in either Write Through or Write Back Mode. Servers can leverage any SSD in the Flash Cluster to off load writes and achieve a dramatic IOPS improvement. FVP also comes with a very nice plugin… Read More »


Lotus Notes, Windows 7, and Horizon Mirage

IBM’s Lotus Notes has a long history of not conforming to the standards of most every other Windows application. Recently I did  a Horizon Mirage Windows XP to 7 migration proof of concept for a client running 11 different versions of Notes on 10’s of thousands of clients. Along with migrating to Windows 7 the client also decided to use this time to to standardize everyone on Notes 8.5.3. This… Read More »


VCAP-DCA: CLI Command List for Networking

This is the second installment of the list of CLI commands that you need to know for the VCAP-DCA5 test. Again this is not meant to explain the concepts behind the commands, for that read Jason Langer and Josh Coen’s Unoffical VCAP-DCA5 Study Guide or check out Chris Wahl’s #vbrownbag on Section 2. The purpose of this list is to be a quick reference when studying in your lab. One… Read More »


VCAP-DCA: esxcli Command List for Storage

In studying for the VCAP-DCA5 I have been using several great resources, Jason Nash’s VMware vSphere Optimize and Scale class @ Pluralsight, the #vbrownbag videos on You Tube, and The Unofficial VCAP-DCA5 Study Guide by Jason Langer and Josh Coen. One thing that I have learned is that I really need to study the esxcli command namespace and know when and how to use it. To that end I have… Read More »


Analyzing vmkwarnings.log With Python

For all of the reams of documentation on the Internet about vSphere there is a surprising lack of detail about log files other than their location and purpose. After one exports a log package from a host pretty much all you can do is give it VMware support. Hopefully this will help. When you open the [email protected] file you will find several directories. Under /var/log you will find several log files.… Read More »


Visualizing vscsiStats with RStudio

  After yesterday’s post we have gathered valuable data about VM drive activity through with the vscsiStats tool. It is time to put that data to use. The CSV file that was generated is broken down into 16 different metrics for each drive collected and reported as a Histogram. While the numbers themselves are helpful, they have a much larger impact when they are visualized. This can be easily done… Read More »


VCAP-DCA: Using vscsiStats

Properly sizing storage is one of the most important parts of any upgrade to a virtual infrastructure. There are several third party tools to do this made by EMC and others, however vSphere has a powerful tool built right into the CLI, vscsiStats. vscsiStats pulls a wealth of information about the SCSI activity of a VM and allows you to export the data to a CSV file to process with… Read More »


VCAP-DCA: Storage Filters

In studying for my VCAP-DCA5 I have done almost everything in a production environment. One of the big exceptions to this is Storage Filters. Not only have I never used them, I had not heard of them until I began my studies. All Storage Filters are enabled by default. They hide LUNs that you really should not see anyway. LUNs that are already in use by a VMFS datstore, RDMs,… Read More »


How To: Create an Oracle Database for VMware vCenter 5.5

With the new vCenter virtual appliance not supporting Microsoft SQL Server and organizations virtualizing more Linux based guests for Big Data operations like Hadoop it is becoming more common than ever to need to install vCenter with an Oracle back end database. Here is how you do it: 1. Make sure you have the appropriate patch level. For Oracle 10g R2 it is 10.2.0.4. For 11g R1 it is 11.1.0.7.… Read More »


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