[med-svn] [Debian Wiki] Update of "DebianMed-Taverna-20110130" by Hajo Krabbenhöft

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The "DebianMed-Taverna-20110130" page has been changed by Hajo Krabbenhöft:
http://wiki.debian.org/DebianMed-Taverna-20110130?action=diff&rev1=3&rev2=4

  
  For Taverna 2.3, we will include local and ssh invocation as part of the release.  The KnowARC invocation will probably be made available as a plugin.
  
- Need to look at cloud invocation soon.
+ Need to look at cloud invocation soon. Possible clouds:
+ 
+  * Amazon EC2 / Eucalyptus
+  * rackspacecloud.com
+  * VMWare Server / ESXi
+  * BOINC
+ 
+ Amazon, Eucalyptus, Rackspace and VMWare all use virtual machine images of various formats. Using a REST/SOAP API, one of these pre-prepared images can be started on a new virtual machine and the IP is retrieved. For Amazon, we also need to create SSH Keys and use the API to register them with our new virtual machine. After that, invocation proceeds as with SSH invocation. 
+ 
+ Amazon and Rackspace are transient in the way, that shutting down a virtual machine will remove all data of that vm. Eucalyptus and VMWare keep the data so that we could restart the VM later on to satisfy outstanding references. For BOINC, references are impossible because every user and thus every node might go offline at any time.
  
  == Invocation environment checking ==