[FoRK] Amazon SimpleDB out

[Eugen Leitl]

Apparently, it's built on top of Erlang.

http://www.sriramkrishnan.com/blog/2007/12/amazon-simpledb-technical-overview.html

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Here are the highlights as I see it

    * Structured storage service in the same model as EC2 and S3.
    * Launching in a limited beta in a few weeks (I've signed up on the waiting list)
    * $0.14 per machine hour, $0.10 per GB of data transferred in. The data 'out' pricing is a bit interesting - $0.18 for the first 10 terabytes for the month, $0.16 for the next 40 TB and $0.13 for all data after that.
    * Apart from this, there is a cost for storing data -$1.50 per GB per month. Note that you can store data on S3 for cheaper rates and transfer it to SimpleDB for free
    * 10 GB maximum per domain (think 'table') and a limit of 100 such domains. Amazon indicates that these restrictions will be loosened soon.
    * Data model is similar to that of a spreadsheet, except that each 'cell' can have multiple values. The screenshot below (stolen from their documentation) shows off the model very well. The individual worksheets are 'domains' in SimpleDB terminology, rows are 'items' and columns are 'attributes'. However, each item can have more than one value for an attribute (a car could be both 'blue' and 'black') and attributes are optional. In this respect, the model is similar to Google's BigTable. They are pretty dissimilar in other aspects - BigTable stores previous versions of all values and SimpleDB can do limited subset of SQL.

      image
    * Both REST and SOAP apis available (the WSDL should be up soon at http://sdb.amazonaws.com/doc/2007-11-07/AmazonSimpleDB.wsdl)

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Eugen* Leitl <a href="http://leitl.org">leitl</a> http://leitl.org
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