Amazon Dynamo
Shortly after Google announced Bigtable, Amazon followed with the announcement of its internal Dynamo database at the 21st ACM Symposium on Operating Systems Principles held in October, 2007 (http://www.sosp2007.org).
In the paper, now available on Werner Vogels' site at http://www.allthingsdistributed.com/files/amazon-dynamo-sosp2007.pdf, Amazon described a key-value store called Dynamo that was used to power some of Amazon's most critical internal services such as S3 on AWS. The paper brought to bear some key concepts such as key-value storage, consistent hashing, and vector clocks, among others, that were implemented in Dynamo.
Thus, Dynamo offered an alternative to Bigtable's columnar storage for large-scale datasets by ...
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