Tuesday, August 5, 2008

Amazon SimpleDB

Amazon SimpleDB is a distributed database believed to be written in Erlang by Amazon.com. It is used as a web service in concert with Amazon Elastic Compute Cloud (EC2) and Amazon S3 and is part of Amazon Web Services. It was announced on December 13, 2007.

As with EC2 and S3, Amazon charges fees for SimpleDB storage, transfer, and throughput over the Internet. Transfer to other Amazon Web Services is free of charge.

Nitin Borwankar of GigaOM called SimpleDB "hugely disruptive" [in a positive way] to the database market. It has some similarities to CouchDB.

Limitations of SimpleDB

Maximum size of domains
10GB
Maximum domains
100
Maximum attributes per item
256
Maximum size per attribute
1024 characters
Maximum attributes per domain
250,000,000
Maximum items returned in a query response
250
Maximum seconds a query may run
5
Maximum attribute names per query predicate
1
Maximum operators per predicate
5
Maximum predicates per query
5




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