Citrix Xenserver 6.2 Release

Today Citrix organized a webinar called Xenserver 6.2 Release under the Cloud Master Class series. The presenters summarized the new features and performance improvements of the free, now, Xenserver 6.2 and the open source advantages. It was a crowdy place with about a thousand registrations, 50% customers, 20% consultants, 20% partners and 10% potential customers, if I recall correctly. Citrix is on its way to grab more market share on server virtualization platforms!

I attach the latest slide of the presentation that underlines the main points of Citrix Xenserver 6.2

Xenserver 6.2 Summary

Xenserver 6.2 Summary

Looking forward to upgrade my setups…

More at


Citrix Xenserver hypervisor goes open source

Yesterday Citrix announced the availability of a full featured, open source, freely available XenServer 6.2 offering. Also introduced community portal for developers collaboration and 3rd party products integration. The free, open source Xenserver 6.2 is available at portal, which is the same binary as the licensed version. Citrix offers a fully supported commercial option as well, which includes packaged updates and worldwide technical support and new per-socket license pricing.

Xenserver provides an open source virtualization solution that could power major cloud orchestration platforms including the OpenStack, a global collaboration of developers and cloud computing enthusiasts producing an open source cloud computing platform for public and private clouds.

In my opinion, Citrix is focusing on desktop virtualization and its supplemental network products. The future development of Xenserver platform will be in the hands of the open source community.

Citrix Netscaler 10.1 as a SPDY Proxy

At the end of May, Citrix announced version 10.1 of its Netscaler ADC. One of the new features is the support of Google’s SPDY v2 open protocol for any backend loadbalanced website (v3 is on the way). SPDY is like HTTP protocol with enchancements to reduce web page loading time, meaning faster Internet communication.

SPDY modifies the the way HTTP handles requests and responses. It uses compression, multiplexing and prioritarization to reduce the load latency. By multiplexing and prioritarizing the web objects of a page, only one connection is required. By compressing and deduplicating the headers the packet overhead size is reduced. A 30% to 60% performance improvement can be achieved by using SPDY.

Popular web browsers like Chrome, Firefox and Opera implement already this protocol and many heavy load websites have adopted his technology, like Google, Twitter, Facebook and WordPress to name a few. SPDY actually sits on HTTP layer, so the web applications on the datacenter do not need to be changed.  Now, even the web servers may remain intact since Netscaler’s SPDY proxy handles the SPDY client-server communication and translates it to HTTP for the backend servers.

You can check which websites use SPDY on a Chrome browser by typing


at the URL address.

So, upgrade your Netscaler and enable the SPDY feature. More on this soon!

Cisco Connect Greece 2013 at Athens – The Internet of Everything

Photos from Cisco Connect Greece 2013 at Athens,  Greece. An interesting event about Cisco’s vision for the upcoming few years, the Internet of Everything.


A Cisco platform from sensors to networks to data analysis and decision making.


Don’t get fooled with the empty seats. The room was full of people. The photo was taken during the coffee break.


Mr. Antonis Tsimoukis, General Manager of Cisco Hellas opened the event.


A greek guy from Cisco UK, I don’t remember his name, talking about smart cities and local authorities’ european initiatives. Barcelona seems to be a prototype iCity in Europe.


Mr. Thanos Falagas, Marketing Director of Hellenic Telecoms Group, made an overview of IT trends and the position of Hellenic Telecoms in this landscape.


Mr. Andreas Enotiadis, Director Global Connected Industries Solutions, a Cisco guy who made a very interesting speech about Internet of Everything concept.