Citrix XenServer 5: Optimized Performance for XenApp Compared to VMware ESX 3.5u3

Posted on May 12th, 2009 in Industry News, Tips, Xen | No Comments »

Just got another report posted by Tolly Group:
Citrix XenServer 5: Optimized Performance for XenApp Compared to VMware ESX 3.5u3

Tolly Citrix Systems commissioned Tolly to evaluate the performance of Citrix XenApp when running on Citrix XenServer 5 and compare that with XenApp running on VMware ESX 3.5u3.

Testing focused on system scalability and user quality-of-experience. This test report was approved for publication by VMware. The VMware End User License Agreement (EULA) requires such approval.

The testing was conducted in accordance with Tolly Common RFP #1101, Virtual Server Performance. That document is available for license and you can find more information about it on the Tolly Common RFP website.

Download the free Citrix/VMware report as below:
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SAP Virtualize with Citrix XenServer

Posted on March 11th, 2009 in Announcement, Industry News, Virtualization | 4 Comments »

Just read through the virtualization info today and found the interesting post regarding SAP internal is going to virtualize with Citrix XenServer. I will not copy the full story as you can read more from here.

As the article stated, there are 500 machines which will be virtualized in Citrix Xenserver, are not be used in production environment. Those machines are development, test and training environment for SAP internally.  We know SAP is 1 of the heavy user for VMware since years back. A move to Citrix  Xenserver did surprise myself, but obviously it does provide more choice to SAP internal.

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My Personal Experience about Citrix XenServer 5.0

Posted on October 8th, 2008 in Virtualization, Xen | 25 Comments »

Yesterday Craig mentioned about 8 VCPU per VM on Citrix XenServer 5 is really a good stuff from Citrix and I must admit that.

I did a quick test and I would like to share my personal review about Citrix XenServer 5.0:

Personally I think network speed is fast compare to VMware ESX. I have a physical 1Gbps NIC network speed and I can get 2Gbps network speed after install XenTools on Windows 2008 server but require 2 times reboot(SuSE Linux require 1 reboot). Anyway VM guest shutdown and reboot process is faster than VMware ESX.

Citrix XenServer

I was try to install SuSE Linux 10 using 4 ISO CD (both NFS or CIFS), the Citrix XenServer always give me an error “The VM rejected the attempt to detach the device xxxxx refusing to close” when switch ISO CD1 to ISO CD2. You have to extract 4 ISO CD into one single location to make it work or copy ISO to local storage(provider you have enough local disk space).

Citrix XenServer

The enterprise product should not have similar issue and this is not make sense at all.

Citrix XenServer

Anyway, you can try alternative way using “Install URL” instead of using ISO Image once you have extract ISO CD into single folder on your web server.

Install URL: http://xx.xx.xx.xx/inst/10/32/SP2/ALL
Advanced Boot OS Parameters:
console=ttyS0 xencons=ttyS hostip=xx.xx.xx.xx/24 gateway=xx.xx.xx.xx dnsserver=xx.xx.xx.xx

Please make sure your have correct IP, gateway and DNS setup properly else you will getting error during installation.

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