[Cassandra Wiki] Update of "CassandraUsers" by MarianoBarrios

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The "CassandraUsers" page has been changed by MarianoBarrios.
http://wiki.apache.org/cassandra/CassandraUsers?action=diff&rev1=20&rev2=21

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  == Cassandra Users ==
  
  ===== Please give company/organization name, description of use case, and potentially a link to a blog post or press release for more information =====
-  * '''[[http://www.despegar.com/|Despegar]]''' - Despegar uses a small Cassandra cluster to storage user sessions of its hotel booking site. It's also in the process of migrating a persistent cache of flight itineraries.
+  * '''[[http://www.despegar.com/|Despegar]]''' - Despegar uses a Cassandra cluster to storage user sessions of its hotel booking site, and also as a  a persistent cache of flight itineraries.
   * '''Digg''' - The recent V4 relaunch is 100% Cassandra. We are running on multiple clusters internally, our largest one is 40 nodes spanning multiple datacenters. We also have 1 core commiter on staff.
   * '''Facebook''' - Facebook uses their internally developed Cassandra and has the largest known cluster in operation of around 150 nodes.  See the [[http://www.cs.cornell.edu/projects/ladis2009/papers/lakshman-ladis2009.pdf|Cassandra paper]] and recent [[http://www.mail-archive.com/user@cassandra.apache.org/msg04048.html|mention]] of their cluster
   * '''[[http://www.visualdna.com/|Imagini]]''' - We use Cassandra to store all real-time data for our ad targeting technology (VisualDNA). We run a Cassandra cluster on Amazon EC2 nodes across multiple availability zones. We also use Hadoop for batch processing, integrated with Cassandra.