Export to another cassandra cluster

[Joost Ouwerkerk]

I want to export data from one cassandra cluster (production) to
another (development).  This is not a case of replication, because I
just want a snapshot, not a continuous synchronization.  I guess my
options include 'nodetool snapshot' and 'sstable2json'.  In our case,
however, the development cluster has 10 nodes whereas the production
cluster has 40.  What's the recommended strategy for getting the data
in one column family from one cluster to the other?