Virgil now supports PATCH semantics for row updates in Cassandra via REST.
In REST, when a resource is modified rather than fully replaced by an HTTP operation, the IETF is proposing a new HTTP method, PATCH.
Virgil now allows users to use this HTTP method to add and modify columns in a single post (without reposting the entire row). We've included an example in the Getting Started instructions.
Likewise, PUT operations will now replace the entire row, per HTTP semantics.
(Thanks to David Strauss for suggesting this)