PCoIP performance over lossy networks.

This week as you guys know, I spent quite a lot of time at Citrix Synergy 2010 in San Francisco and during that time we were able to extensively test how all major remote display protocols work over the real world WAN and in a certain way, what we saw simply validated what I was expecting to see.

First of all, let me define real world WAN and explain how we actually know what this is. If you are not familiar with our technology, IPQ, it is a packet loss reduction mechanism that works between two end points. As we adapt according to the network conditions, we must know at any given time what these are. That is the reason why our endpoints exchange a beacon at all times. This gives us over 25 stats that we use to determine the most effective way to deal with packet loss in real time.

Of course all that information gets stored and we can plot what we are seeing right within our web interface. And guess what? During this week we spent in San Francisco, doing our demos from a hotel room using the provided internet connection – the exact same one all of you had in your rooms – we have seen packet loss at all times. How much? From 1% all the way to 15% (burst loss). The bottom line here is simple: loss is guaranteed out there and it is MUCH higher than the 0.5% loss that Brian and Gabe used on their WAN simulator during the VDI Geek Week shootout. That is the reason why ICA, RDP and PCoIP performed relatively well on their ‘WAN’. In the real world, with unpredictable conditions, performance is not really like that. I am not saying that loss will be high and will be there at all times. I am just saying loss will get you several times during the day. When and how much that will be no one knows. But it will be there. For sure.

So back to the topic, how well does PCoIP perform over the real world WAN? Not that well as expected. And here is the living proof of that. Notice how much better PCoIP gets when IPQ is brought to the picture. It gets almost as good as ICA (in case you did not see our tests with ICA, go here).

No matter what VMWare and Teradici tells you, TCP with its retransmission techniques, in this particular type of connection (PPTP VPN), DOES perform much, MUCH better than PCoIP. Just watch the two videos for yourself (the PCoIP is also available in high definition 720p). At 3% loss ICA simply smokes PCoIP (that without our technology is virtually unusable – again, over PPTP. LT2P may change things, making PCoIP closer to ICA over the WAN). The game changes completely when IPQ is on. ICA improves for sure (again, watch the videos) but PCoIP at that point really shines. The improvement is brutal, huge. At the end we turn something that is really unusable over the lossy WAN into something people can actually use. It is that much of an improvement.

In case you want the direct YouTube links, here you have them:

ICA: http://www.youtube.com/watch?v=Yw5lBk-bdv8
PCoIP: http://www.youtube.com/watch?v=AXpbawlg90Y

The bottom line is simple. All current implementations for remote display technologies do suffer over the real world WAN. The idea of our technology is to work as ‘Network Insurance’ for your connection. If the conditions are good we know that thanks to our beacon exchange and at that stage we simply turn ourselves off. But when loss comes, we are there to protect you. Exactly like your insurance company. You have it and hope not to use it. Ever. But when you need it, you know it is there and that you can count on it.

That is what we are. Network Insurance for you and your users.

CR

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