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Amazon SimpleDB is a distributed database written in Erlang[1] by Amazon.com. It belongs to the NoSQL movement. 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.[2]
As with EC2 and S3, Amazon charges fees for SimpleDB storage, transfer, and throughput over the Internet. On December 1st 2008, Amazon introduced a new pricing with free tier[3] for 1 GB of data & 25 machine hours. Transfer to other Amazon Web Services is free of charge.[4]
[edit] Limitations of SimpleDB
Published limitations[5]:
[edit] Store limitations
| Attribute |
Maximum |
| domains |
100 active domains |
| size of domains |
10GB |
| attributes per domain |
1,000,000,000 |
| attributes per item |
256 attributes |
| size per attribute |
1024 bytes |
[edit] Query limitations
| Attribute |
Maximum |
| items returned in a query response |
2500 items |
| seconds a query may run |
5 seconds |
| attribute names per query predicate |
1 attribute name |
| comparisons per predicate |
20 operators |
| predicates per query expression |
20 predicates |
[edit] References
- ^ What You Need To Know About Amazon SimpleDB
- ^ Amazon SimpleDB- Limited Beta
- ^ SimpleDB - Free Tier - A shift in AWS pricing
- ^ Amazon SimpleDB official home page
- ^ Amazon SimpleDB Limits, Amazon SimpleDB Developer Guide (API Version 2007-11-07)
[edit] External links
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| Annual Revenue: ▲US$19.17 billion (FY 2008) · Employees: 20,500 (FY 2008) · Stock Symbol: NASDAQ: AMZN · Website: Amazon.com |
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