As a young programmer, I read a book by Michael Abrash, which has provided me with guidance over the years available. "The Zen of Code Optimization" was founded in 1994 and discussed graphics coding and performance with Intel released the 8086 assembly language, implemented under DOS.
Today it is $ 1.78 used on Amazon and if you have to kill a little time, I recommend at least by read Chapter 3, where the author provides these words of wisdom.
"Assume nothing. I would recommend this highly enough, if not to emphasize worry about the performance, if you do not do your best to improve the code, and then measure the improvement. measure performance, you're just guessing, and if you guess, you are not likely to write code class. "
Profound words :. Whether to 1994 measure the performance of Doom and Wolfen DOS video games, or to measure the performance of 5,000 users, geographically diverse XenApp and XenDesktop configuration in 2015, the same principles apply You can check the performance results guess all want you, but you need measure to actually understand.
As best you measure a system that requires to model 5000 machines? Answer: Setting up of 5,000 machines
The Citrix Solutions Lab exists for this purpose - it is a multi-million dollar tape measure that implements measure the performance of Citrix solutions carefully at full scale exist .. The laboratory provides a platform for IT professionals and architects Citrix hypothesis and measured to provide results in question. Known for setting the scalablity and density requirements for very large Citrix datacenters laboratory also influenced the design of future versions by a solid view of the present deployment and let us know how things work now, and areas in which we are constantly work improve.
Citrix Solutions Lab
Physically, the solutions lab a lab. A data center with all the ingredients that one would expect to see in something to support an entire company. Here are some pictures
No secret -. One building, many computers, hypervisor, network, storage, A / C and a really big electricity bill. The trick to this data center is that it exists purely Citrix products to model and perform measurements.
Everything is full-scale
Do you want to know how a 5000 users will work XenDesktop configuration? Run 5,000 hosted VMs and 5,000 ICA Clients and add some NetScaler gateway for remote access. Massage the networking add latency and ... simulate the world! End measuring? What did you learn? How to tune the model for superior performance and density? Lather, rinse and repeat. Hold this for a while, and sit down on a configuration, and you have results. The results that can be written in a paper and shared. When trying to understand the complexity and interaction on a large scale, is the best way to take the measurement, a complete system is to be measured in full size. Solutions Lab provides this service.
expensive? You Betcha!
But less expensive when Citrix makes the work (again), and learned the information all our clients (many) can leverage. Citrix can perform the measurement and use the results together, and all of our customers can use the data when the architecture of their IT systems to define. The solutions lab team also have the advantage that all product experts to query in the provision and use this information to make using the definition of the reference architectures, and including the configuration data in the reference architecture.
The product
We are talking about the laboratory and computer, but the solutions lab is really the people; the people who document the tests, and present the output carry. They are experienced IT administrators and architects who daily set up, testing, tweaking, documentation, cracking and start again, to carefully document the system configuration and to measure the results.
Citrix other's laboratories, the purpose to verify that things exist to take the solutions lab
, the output of the laboratory's documents and reference architectures "to work." "Measurements."; Things that can be GOLD for IT architects and CIOs. The issue is also presentations. At Citrix Synergy and related events that you see the solutions lab people presentations show the measurements they have taken, and describes the process, the results and all the "gotchas" they have encountered along the way. They are also regular speakers at the Synergy Technology Expo, where to stop for the face, allowing you to provide the discussion.
Here are some examples presentation of Citrix Synergy 2015, all video.
- SYN305 reference architecture for Citrix Workspace Suite
- SYN307 power of a NetScaler in a combined XenDesktop and XenMobile environment
- SYN319 Tech update for XenApp and XenDesktop, density enhancements XenApp 5.6 to 6.7
- SYN238 security enhancements in XenApp and XenDesktop 7.6
beginning this year I asked the laboratory model of a public sector "Federal" XenApp and XenDesktop configuration. Common Criteria Configuration locked with Windows Stigs, HBSS anti-virus and configured in accordance with Citrix XenApp / XenDesktop FIPS 140-2 compliance documents including TLS use both inside and outside the NetScaler Gateway with ICA proxy network separation. How does this compare to a commercial configuration? What are the density requirements for federal customers against the business models that have been done in the past?
Tony Pimper has booked the solutions lab team a blog on the activity and a link to the pdf results here. My SYN238 presentation link above, goes on the results, starting at 21:00.
Joe North
Product Manager, Public Sector, Citrix
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