Do I need to install Thrift on both my servers (Application/DB)?

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http://serverfault.com – Here is my situation. I have two servers. One as all my applications (PHP), the second as Cassandra DB with Solr (Solandra), and OpsCenter. I am using PHP on my application server to access my Cassandra data with PHPCassa. My question is, do I need to install Thrift on my application and/or my DB server? UPDATE I have install thrift and cassandra together on one server in the past and it worked. My problem to day is that I have two servers. One with the applications and one with Cassandra. My question is how can I make PHP talk Cassandra on the other server? Because when I look at my note (HowTos)