Diagnosing long logon times is quite a challenge. Citrix Director breaks our logon time down into unique phase to help focus your attention on an aspect of the entire logon process instead of logon in its entirety. Looking at my 100+ second logon time, I noticed I have a 24 second virtual machine start time. This is new for my environment. If properly designed, the VM start time would add 0 seconds to a user’s logon time. We want our VMs ready before the user requests it. If we look at the power management settings I have for this delivery … Continue reading Logon: VM Start
I just experienced a 100+ second logon time for my Virtual Apps and Desktops session. Hopefully, you are not thinking “That’s pretty fast”. If I look at the detailed breakdown of my logon time, you can see it is a mess. Something is happening with my environment to cause things to spike. I want to focus on Brokering. Why is this logon so long when compared to the user average for the past 7 days? To better identify where to start troubleshooting, we need to better understand the brokering process. When the user selects a link to start a session, … Continue reading Logon: Brokering
Wow! That’s fast. That is the reaction users should have when they log onto their virtual desktop. I’ve heard many talk about how slow or fast their logons are, but many times we tend to exaggerate. I’ve discussed this topic before in two recent blogs: Improving logon time with Workspace Environment Management How does Workspace Environment Management work So I thought it might be interesting to see the difference Workspace Environment Management has on the logon experience with VDI. Note: Both of these examples mapped 5 drives, mapped 3 printers, used a 500MB roaming profile and executed a single logon … Continue reading Achieving fast logon times
I love data. I like seeing numbers and graphs. I like to see if something is having an impact.
I like when new capabilities provides us with the means to monitor because this data gives me reassurance that the feature has an impact instead of me simply believing it does.
Let’s look at XenServer 7.1 and Provisioning Services Accelerator. I was able to show that
But I didn’t have any details beyond what I was able to gather from a stopwatch.
That was until I starting poking around XenCenter. I was thrilled to see a set of metrics specific to PVS Accelerator
I’ve been able to experience the results of implementing Workspace Environment Management into a Citrix XenApp and XenDesktop environment. I was easily able to obtain at least a 50% reduction in logon duration.
I understand the why.
I want to now understand the how.
Let’s first examine the Windows logon process.
The title is correct. We can improve user logon time by implementing PVS accelerator in XenServer 7.1.
This actually makes perfect sense.
We already showed that PVS Accelerator drastically improves VM boot times because portions of the master vDisk image are cached locally. Booting a VM equates to roughly 80% reads and 20% writes. VMs using the same image are reading the same blocks of data. Due to this similarity, we are able to see huge network utilization reductions by using the PVS Accelerator cache. These reductions in the network utilization translates into faster boot times.
But what about logon time?