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Ruby interfaces to four key Amazon Web Services: EC2, S3, SQS, and SDB. RightScale AWS is an open source solution that will provide developers with robust, fast, and secure Ruby interfaces to Amazon EC2, Amazon S3, Amazon SQS, and Amazon SDB. The RightScale AWS gems use Amazon's REST and query interfaces to provide full programmatic control. An optional robust HTTP layer retries and clears transient errors.The design goals for RightScale AWS are:· Full programmmatic access to EC2, S3, SQS, and SDB.· Complete error handling: all operations check for errors and report complete error information by raising an AwsError.· Persistent HTTP connections with robust network-level retry layer using RightHttpConnection). This includes socket timeouts and retries.· Robust HTTP-level retry layer. Certain (user-adjustable) HTTP errors returned by Amazon's services are classified as temporary errors. These errors are automaticallly retried using exponentially increasing intervals. The number of retries is user-configurable.· Fast REXML-based parsing of responses (as fast as a pure Ruby solution allows).· Uses libxml (if available) for faster response parsing.· Support for large S3 list operations. Buckets and key subfolders containing many (> 1000) keys are listed in entirety. Operations based on list (like bucket clear) work on arbitrary numbers of keys.· Support for streaming GETs from S3, and streaming PUTs to S3 if the data source is a file.· Support for single-threaded usage, multithreaded usage, as well as usage with multiple AWS accounts.· Support for both first- and second-generation SQS (API versions 2007-05-01 and 2008-01-01). These versions of SQS are not compatible.· Test suite (requires AWS account to do "live" testing).NOTE: Rightscale AWS is licensed and provided under the terms of the MIT/X Consortium License.

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