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Posts Tagged ‘Sizing’

#VDI Calculator v5 is Now Available with Major New Features – #IaaS, #Storage, #BYOD via @andreleibovici

February 3, 2014 Leave a comment

This is awesome! Great work by @andreleibovici!

I am happy to announce the General Availability of the new VDI Calculator v5. This new version is the single biggest release since I started delivering the calculator. I have completely re-architected the way the calculator works, allowing multiple types of desktops to be configured in a single calculation for a single solution.
 
All existing features have been retained and will work in the exact same way you are used to, but you now have the ability to select different  options for different types of desktops or desktop pools.
 
As an example, you may choose Desktop Type 1 to be a ‘student’ desktop using Linked Clones with 10 different pools; conversely you may choose Desktop Type 2 to be a ‘professor’ desktop using Full Clones with 5 individual pools. This new calculator gives you much more granular control over your calculations eliminating repetitive tasks when sizing larger environments.
 
To enable multi-desktop pool calculations just select ‘-’ and ‘+’ in the top bar menu.
 

Screen Shot 2014-02-01 at 9.50.39 AM

 
Another additional feature is what I call ‘Ask for Help‘. During the application session when you select the Update option a new screen will show up asking if you would like to be contacted by VDI solutions vendors that can help reduce costs, improve performance or improve manageability of your VDI solution. If you are interested…

Continue reading here!

//Richard

Sizing #XenDesktop 7 App Edition VMs – #Citrix

November 5, 2013 Leave a comment

A good update on VM sizing by Daniel Feller!

In the Mobilizing Windows applications for 500 users design guide, we made the recommendation to allocate 8vCPUs for each virtual XenDesktop 7 App Edition host (formerly known as XenApp). Spreading this out across a server with two Intel Xeon E5-2690 @2.9GHz processors and 192 GB of RAM, we were yielding about 200 users per physical server and roughly 50 users per virtual server.

Of course, the design guide is the end result of a lot of testing by the Citrix Solutions Lab. During the tests, we had the Solutions Lab compare many (and I mean many) different configurations where they changed the number of vCPU, RAM size, and RAM allocation (dynamic/static) as well as a few other things. All of these tests were done with Windows Server 2012 with Hyper-V. We ended up with the following:

A few interesting things:

  1. Dynamic vs static RAM in Hyper-V appeared to have little, if any, impact on overall scalability. The only time when the RAM allocation had a negative impact was when not enough RAM was allocated (no surprise there).
  2. The 8vCPU and the 4vCPU configurations resulted in very similar user concurrency levels. Get ready… The battle is about to begin as to whether we should use 8 or 4 vCPU. (Is anyone else besides me having flashbacks to 2009?)

A few years ago, we debated about using 2vCPU or 4vCPU for XenApp 5 virtual machines. A few years later, the debate is resurfacing but this time, the numbers have doubled: 4 or 8. Here is what you should be thinking about… VMs are getting bigger because the hardware is getting faster, RAM is getting cheaper and the hypervisors are getting better…

Continue reading here!

//Richard

#Citrix #XenApp 6.5 Hosted Shared Desktop Sizing Example

January 16, 2013 Leave a comment

Great Citrix blog post series from Andy Baker!

In this blog series I’m taking a look at scalability considerations for XenApp 6.5 Hosted Shared Desktops, specifically:

  1. How to estimate XenApp 6.5 Hosted Shared Desktop scalability
  2. What’s the optimal XenApp 6.5 VM specification?
  3. XenApp 6.5 Hosted Shared Desktop sizing example

My last post provided guidance on the optimal XenApp virtual machine specification.  Now in the last post of the series, I’m going to walk through an example sizing exercise.

Scenario

Company ABC recently completed a user segmentation exercise.  The following table includes 8 user groups that have been identified as good candidates for a Hosted Shared Desktop.  None of these user groups requires the ability to install applications or the ability to customize their desktop beyond profile based changes.  Three separate Provisioning Services images will be created due to application compatibility conflicts identified by Citrix AppDNA.

With Hosted Shared Desktops, it is important to consider the ‘Maximum Number of Concurrent Users’ column rather than the ‘Total Number of Users’ column.  Sizing the environment for concurrency rather than the total number of users will help to reduce infrastructure costs without affecting performance or availability.

Sufficient redundancy should be incorporated into the sizing estimate so that a single XenApp server or virtualization host failure does not affect the total number of concurrent users that can be supported (n+1).

Company ABC wishes to use their standard hardware specification…

Continue reading here!

//Richard

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