[Cassandra Wiki] Update of "FAQ" by StuHood

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The "FAQ" page has been changed by StuHood:
http://wiki.apache.org/cassandra/FAQ?action=diff&rev1=17&rev2=18

   1. Use the `get_string_property("token map")` RPC to obtain an update-to-date list of the nodes in the cluster and cycle through them.
   1. Deploy a load-balancer, proxy, etc.
  
+ == What kind of hardware should I run Cassandra on? ==
+ 
+  * Memory
+    * The more memory, the better: recently written data will be held in [[MemtableThresholds|memtables]] and older data will remain on disk, but will be cached by the OS's filesystem cache.
+  * CPU
+    * FIXME
+  * Disk
+    * For optimal performance, at least 2 disks are required to run Cassandra. One disk should be dedicated to use by the commit log (defined by the CommitLogDirectory config parameter), and the remainder of your drives should be listed as places to store data files (the DataFileDirectories config parameter).
+    * If you use raid, it is recommended to use raid1 pairs, and to list each pair separately as DataFileDirectories, with one pair for the CommitLogDirectory
+