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From Jonathan Ellis <>
Subject Re: backing up data from cassandra
Date Mon, 05 Oct 2009 12:22:58 GMT
You can take a snapshot and either leave it in place indefinitely or
throw it into your existing backup ecosystem.  That's your best option
for backup no matter which kind of partitioner you're using.


On Mon, Oct 5, 2009 at 12:52 AM, Edmond Lau <> wrote:
> 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?
> Edmond

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