VMware View 與Citrix XenDesktop對決之用戶體驗篇

 

 

看看真實的VMware View 與Citrix XenDesktop對比。

 

用戶體驗做爲虛擬桌面的關鍵因素，看看VMware View如何立於不敗之地。

 

對於測試中暴露的差別，您也許會以爲困惑。其實當您瞭解完下面這些，就全明白了。

Citrix 的 XenDesktop 使用的是 PortICA 協議，而不是 XenApp 的 ICA 協議（由於 ICA 是基於 Terminal Server ， PortICA 基於 XP 。二者底層架構相差很大，必須從新實現）。

XenDesktop 的表現實際上是不如 XenApp 的。不過不少人被混淆了。把 XenApp 的光環也戴在了 XenDesktop 頭上。

 

下面是二篇英文文章比較 PortICA 與 ICA 的差異。

 

Why ICA is not ICA

http://www.ervik.as/index.php/citrix-mainmenu/xendesktop/1248-why-ica-is-not-ica

 

【關鍵摘要】 What does this mean for XenDesktop? Well, of course the ICA stack in XenDesktop inherits heavily from XenApp (Jeff has blogged on this extensively, and Brian has a more detailed analysis too). But the underlying infrastructure is very different: XenApp builds on top of Terminal Services, while XenDesktop uses basic OS APIs. This means that some XenApp features that are intricately linked to the Terminal Services platform, like shadowing, are by no means a straight: "just recompile this for Windows Vista and it'll work". Instead, we had to re-code some features from scratch in a way that's different from, but compatible with XenApp. All this takes time, and that's the main reason we shipped the first version of XenDesktop with some of the "ICA features" missing.

 

PortICA: The same, but different

http://www.brianmadden.com/blogs/brianmadden/archive/2008/04/14/accessing-windows-xp-and-vista-via-citrix-xendesktop-ica-portica-how-does-this-really-work.aspx