Remko Weijnen's Blog (Remko's Blog)

About Virtualization, VDI, SBC, Application Compatibility and anything else I feel like

Archive for May, 2011

SSL Certificates in termsrv.dll

I was digging around in termsrv.dll yesterday when I noticed that there are some (well 372 to be exact) SSL certificates inside the Terminal Server binary (termsrv.dll):


Two of them seem to actually contain the private keys as well, but I am not 100% sure it may be just a certificate in another format.



I was deploying virtualized Citrix XenApp Servers on HP BL460c G6 servers and somehow the storage (direct attached) responded very slowly.

I had expected reduced performance (see my earlier post) since I didn’t have the  Battery Backed Write Cache module installed.
I did order them but had to start deployment before they arrived.

I did not however expect such an extreme bad performance. Deployment took ages or sometimes failed completely and when logging in to a VM it responded very sluggish.

Disk Latency

I looked in the vSphere console what the Disk Latency was. Latency under 10ms is usually considered good while a latency between 10 and 20ms is a potential performance problem.

I was shocked to notice that the Disk Latency was much higher with peaks toward 2.000 ms (2 seconds!):




  • Filed under: Citrix, VMWare
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