编辑“︁Amazon SimpleDB”︁

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'''Amazon SimpleDB'''是一個分散式資料庫，以[[Erlang]]撰寫。同與[[Amazon EC2]]和亞馬遜的S3一样作为一项Web 服务，属于[[亞馬遜雲端運算服務]]（AWS）的一部分。
[[File:AWS Simple Icons Database Amazon SimpleDB Item.svg|thumb|SimpleDB的Logo]]

正如EC2和S3，SimpleDB的按照存儲量，在互聯網上的傳輸量和吞吐量收取費用。 在2008年12月1日，亞馬遜推出了新的定價策略，提供了免费1 GB的數據和25機器小時的自由層(Free Tire)<ref>{{Cite web |url=http://blog.sdbexplorer.com/2008/12/simpledb-2000000-free-requests-for-next-six-months/ |title=SimpleDB - Free Tier - A shift in AWS pricing |accessdate=2011-06-25 |archive-date=2008-12-25 |archive-url=https://web.archive.org/web/20081225005319/http://blog.sdbexplorer.com/2008/12/simpledb-2000000-free-requests-for-next-six-months/ |dead-url=no }}</ref>。 将其中的数据轉移到其他亞馬遜網絡服務是免費的。<ref name="simpledb-home">{{Cite web |url=http://www.amazon.com/b?node=342335011 |title=Amazon SimpleDB official home page |accessdate=2011-06-25 |archive-date=2019-09-19 |archive-url=https://web.archive.org/web/20190919032346/https://aws.amazon.com/simpledb/ |dead-url=no }}</ref>

==限制==

發行限制<ref name="limits">{{Cite web |url=http://docs.amazonwebservices.com/AmazonSimpleDB/latest/DeveloperGuide/index.html?SDBLimits.html |title=SimpleDB Limits'', Amazon SimpleDB Developer Guide (API Latest version) |accessdate=2011-06-25 |archive-date=2011-06-24 |archive-url=https://web.archive.org/web/20110624122115/http://docs.amazonwebservices.com/AmazonSimpleDB/latest/DeveloperGuide/index.html?SDBLimits.html |dead-url=no }}</ref>:

===儲存限制===

{| class="wikitable" border="1"
|-
! 屬性 
! 最大值
|-
| 域
| 每個帳號有250個活動域. 可以填表取得更多.
|-
| 每个域的大小
| 10GB
|-
| 每个域的屬性量
| 1,000,000,000 
|-
| 每条目的屬性
| 256 attributes
|-
| 每个属性的大小
| 1024 bytes
|}

===查詢限制===

{| class="wikitable" border="1"
|-
! 屬性 
! 最大值
|-
| 每次查詢的条目（item）數 
| 2500 個項目
|-
| 查詢的运行时间 
| 5 秒
|-
| 每個查詢謂詞（query predicate）的屬性名稱 
| 1 屬性名稱
|-
| 比較每個謂詞 
| 20 操作子（operators）
|-
| 每次查詢謂詞表達
| 5 謂詞（predicates）
|}

== 注釋 ==
{{reflist}}

==外部連結==
*[http://aws.amazon.com/simpledb/ Amazon SimpleDB official home page]{{Wayback|url=http://aws.amazon.com/simpledb/ |date=20111001072028 }}
*[http://code.google.com/p/nsimpledb/ NSimpleDB - Open source C# implementation of the SimpleDB data model for the desktop; can also be used as a proxy for SimpleDB]{{Wayback|url=http://code.google.com/p/nsimpledb/ |date=20110522120204 }}
*[http://www.mgateway.com/mdb.html M/DB - a Free Open Source API-compatible alternative to SimpleDB that can be used as a local or cloud database]{{Wayback|url=http://www.mgateway.com/mdb.html |date=20110714081559 }}
*[http://simplesavant.codeplex.com/ Simple Savant - Open-source .NET object-persistence framework for Amazon SimpleDB written in C#.]{{Wayback|url=http://simplesavant.codeplex.com/ |date=20101229121751 }}
*[http://code.google.com/p/typica/ typica - A Java client for SimpleDB and other Amazon Web Services]{{Wayback|url=http://code.google.com/p/typica/ |date=20110824012827 }}
*[http://code.google.com/p/simplejpa/ SimpleJPA - a Java Persistence API (JPA) implementation for Amazon's SimpleDB.]{{Wayback|url=http://code.google.com/p/simplejpa/ |date=20110822013824 }}
*[https://web.archive.org/web/20110826010707/http://www.sdbexplorer.com/ '''SDB Explorer''' - Tool to explore Amazon SimpleDB service.]

{{雲端運算}}
{{NoSQL}}
{{Amazon}}

[[Category:Amazon Web Services]]
[[Category:面向文档的数据库]]

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