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System Properties Comparison AlaSQL vs. Amazon CloudSearch

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Editorial information provided by DB-Engines
Name	AlaSQL  Xexclude from comparison	Amazon CloudSearch  Xexclude from comparison
Description	JavaScript DBMS library	A hosted search engine service by Amazon with the data stored in Amazons cloud
Primary database model	Document store Relational DBMS	Search engine
DB-Engines Ranking measures the popularity of database management systems Trend Chart	Score 0.54 Rank #228   Overall #35   Document stores #108   Relational DBMS	Score 2.20 Rank #120   Overall #11   Search engines
Website	alasql.org	aws.amazon.com/­cloudsearch
Technical documentation	github.com/­agershun/­alasql	docs.aws.amazon.com/­cloudsearch
Developer	Andrey Gershun & Mathias R. Wulff	Amazon
Initial release	2014	2012
License Commercial or Open Source	Open Source MIT-License	commercial
Cloud-based only Only available as a cloud service	no	yes
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Implementation language	JavaScript
Server operating systems	server-less, requires a JavaScript environment (browser, Node.js)	hosted
Data scheme	schema-free	yes
Typing predefined data types such as float or date	no	yes
XML support Some form of processing data in XML format, e.g. support for XML data structures, and/or support for XPath, XQuery or XSLT.	no
Secondary indexes	no	yes all search fields are automatically indexed
SQL Support of SQL	Close to SQL99, but no user access control, stored procedures and host language bindings.	no
APIs and other access methods	JavaScript API	HTTP API
Supported programming languages	JavaScript
Server-side scripts Stored procedures	no	no
Triggers	yes	no
Partitioning methods Methods for storing different data on different nodes	none	yes automatic partitioning across Amazon Search Instance as required
Replication methods Methods for redundantly storing data on multiple nodes	none	yes managed transparently by AWS
MapReduce Offers an API for user-defined Map/Reduce methods	no	no
Consistency concepts Methods to ensure consistency in a distributed system	none
Foreign keys Referential integrity	yes	no
Transaction concepts Support to ensure data integrity after non-atomic manipulations of data	yes only for local storage and DOM-storage	no
Concurrency Support for concurrent manipulation of data		yes
Durability Support for making data persistent	yes by using IndexedDB, SQL.JS or proprietary FileStorage	yes
In-memory capabilities Is there an option to define some or all structures to be held in-memory only.	yes
User concepts Access control	no	authentication via encrypted signatures
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	AlaSQL	Amazon CloudSearch
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