Simple data importing and exporting with Cassandra

The text discusses various methods of ingesting preexisting data into a Cassandra cluster. It mentions the use of BinaryMemtable, json2sstable and sstableloader tools, and BulkOutputFormat for this purpose. However, it introduces the recently added COPY FROM cqlsh command as an alternative option for importing CSV data into Cassandra. The corresponding COPY TO command is also mentioned for exporting data from Cassandra. The syntax and options of these commands are explained along with examples to illustrate their usage.