Scalability testing with Login VSI: X-IO perspectives
As part of Technical Marketing at X-IO, one of the parts of my job that I enjoy the most is doing performance testing, and I was asked to share how we use Login VSI in our labs. One of the ways that we leverage Login VSI is in scalability testing for VMware Horizon View 6 with our Intelligent Storage Element (ISE) storage arrays. The main challenge that we have is we are constantly running out of CPU and RAM in the servers as we scale up the user loads when testing a single ISE system. Our testing usually consists of multiple clusters of servers, with each running different numbers of desktops, to run as many desktops as we can.
We needed a method for controlling where the desktop users were logging in, and how many would ultimately be running on each cluster. Login VSI does allow for a *.csv configuration file to be used to control this, but we needed something that could be more flexible as we change the cluster config in the environment. With the frequency that we test different configurations, editing the LoginVSI *.csv configuration file was proving too unwieldly.
The method we chose was to leverage the VMware Horizon View 6 desktop pool entitlements to control what users were running where. Entitling individual desktops isn’t feasible when there are several thousand desktops to do this with, so we grouped the Login VSI users into Active Directory groups and granted the entitlements to these groups. In our configuration, we assigned 100 users to each AD group as this gave us a good granularity for controlling where the users were running. This allowed us to have several different desktop pools, all running in different places, with different numbers of users.
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