Showing posts from April, 2010

VMware VDI Considerations

I have been building VDI sandbox solutions for a while and have a few points of interest you need to consider. While most of this is theory it is based on real empirical data. I will be posting much more information and a step by step guide. I mostly use VMware's View for implementing VDI solutions. There are some other really good solutions out there such as Quest vWorkspace, Citrix/Xen Desktop and Panalogic. Here are the main points to keep in mind:

Networking - Most people don't realize that a bad network implementation can really negate a good VDI solution. Something as simple as SNMP monitoring of switched ports using Cacti can show you where the network bottlenecks occur. Fixing the problem can be a bit trickier. Using internal routes and bonding uplinks can give you the bandwidth needed to feed the end users. Studies have shown that VLANs both hinder and help with network traffic. I am not sure which to believe but you should keep this is mind and monitor these if you ha…

Linux Deduplication

I have been looking for an Open Source data deduplication system that is stable enough to use for SMB file servers and for VMware iSCSI targets. Just recently I found a couple that show major promise. I wouldn't say that I am an expert on the subject and to be honest I really am a bit scared of the technology in general because the information stored it not "all there" if you know what I mean.

I think it is wise to really justify the need for it and at most always have some kind of backup to make sure you can get to the un-duped data just incase.

Here are some good open source projects that you might want to take a look at and test with:


lessfs -

Keep in mind that you need to research how to implement this technology. I will eventually write an entire post on how to set up some sort of test bed for each. I will include a step by step scenario using it for SMB sharing.

Gem 1.3.2+ on Ubuntu 9.10 from scratch

So I was working on a new install of and it needed Gem 1.3.2 which doesn't come with the Ubuntu 9.10 in the apt-get packages.

I made sure that Ruby 1.8.7 was install on the system by entering this ruby -v If nothing showed up refer to my ruby post for installation instructions.

Ok, so I am going to download the installer to the linux machine and then install wget unzip cd rubygems-1.3.6 ruby setup.rb Everything should have installed properly. Now look in the folder /usr/bin/ for gem1.8. Now most people might have already caught this but I didn't at first. you can't run "gem" from command line because it is actually gem1.8. I created a sym link to the gem1.8 with the below command.
cd /usr/bin ln -s gem1.8 gem That should do it. Log into the system as a regular user and then enter the below to check the gems version gem -v