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From Edmond Lau <>
Subject backing up data from cassandra
Date Mon, 05 Oct 2009 05:52:15 GMT
For folks who are using or considering using cassandra in their
production systems, what do you use for backups?

With HBase, one could potentially write a mapreduce to perform a row
scan of the entire table (restricted to some historical timestamp to
get a consistent view) and export the data to hdfs.  With Cassandra,
if you're using an ordered partitioner, a similar mechanism could be
built over a key range scan.

With a random partitioner, though, there's no api to iterate through
all existing keys.  Why not?


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