RC.connect is used to connect to a Cassandra
instance. The obtained handle is then used for all operations until
RC.close is used to close the connection. A set of RC.get functions can be used to query the
database. Specialized high-level interface for fixed-column tables
(not the most common in Cassandra, thgouh) is also available with
RC.read.table.
Updates and inserts can be performed either individually using the
RC.insert function or batch-mutations using
RC.mutate.
Auxiliary functions retrieving meta-information from the database
are described on the RC.version help page.
Currently, communication to Cassanra is performed directly on a
blocking TCP/IP socket. This implies that transactions currently
cannot be interrupted on the R side and there is no timeout. This may
change in future versions. The code does not use R connections
to avoid extra overhead.
| Package: |
| RCassandra |
| License: |
| GPL-2 |
| URL: |
| http://www.rforge.net/RCassandra |
Index:
RC.cluster.name Functions retrieving meta-information from a
Cassandra connection
RC.connect Connect, login, close connection to Cassandra
RC.get Functions for querying Cassandra database
RC.insert Update function to insert data into Cassandra
RC.read.table Read and write tables into column families in
Cassandra