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For those who are newer to Cassandra, or don't want to host it themselves, we offer a hosted solution on Heroku (just REST), or a managed Enterprise ring (with a REST API) -- http://cassandra.io . I apologize for the website...we just hired a UI guy :)

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Yes, the web site needs work :-) but I just signed up to kick the tires. The .5 gig free tier is nice, thanks, but do you know yet what the cost structure will be for modest use of a few 10's of gigs with moderate traffic?

Also, how do I get service on the AWS availability zone that I use for no bandwidth charges?

All good questions! A base ring is 4 nodes (one in each us-east zone), and you can choose m1.small, m1.large, and m1.xlarge instances. This allows you to create keyspaces with RF 3 safely. I don't have prices on-hand, but I believe the m1.large base-ring is somewhere around 1K a month (snapshot backups/rollbacks included, etc). We're looking for beta testers for the Enterprise version, so deals might be able to be made if you contact the Zendesk e-mail (support@2lemetry.zendesk.com)! Regarding transfer of data and cost, we can add your AWS accounts/AWS security groups to the ring's ACL so you'd be able to use AWS private IP addresses for free data transfer within Amazon regions. Let me know if you have any more questions.

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