DBMS > AlaSQL vs. GeoMesa vs. IBM Cloudant

System Properties Comparison AlaSQL vs. GeoMesa vs. IBM Cloudant

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Editorial information provided by DB-Engines
Name	AlaSQL  Xexclude from comparison	GeoMesa  Xexclude from comparison	IBM Cloudant  Xexclude from comparison
Description	JavaScript DBMS library	GeoMesa is a distributed spatio-temporal DBMS based on various systems as storage layer.	Database as a Service offering based on Apache CouchDB
Primary database model	Document store Relational DBMS	Spatial DBMS	Document store
DB-Engines Ranking measures the popularity of database management systems Trend Chart	Score 0.55 Rank #232   Overall #35   Document stores #111   Relational DBMS	Score 0.75 Rank #203   Overall #3   Spatial DBMS	Score 3.26 Rank #95   Overall #17   Document stores
Website	alasql.org	www.geomesa.org	www.ibm.com/­cloud/­cloudant
Technical documentation	github.com/­agershun/­alasql	www.geomesa.org/­documentation/­stable/­user/­index.html	cloud.ibm.com/­docs/­Cloudant
Developer	Andrey Gershun & Mathias R. Wulff	CCRi and others	IBM, Apache Software Foundation IBM acquired Cloudant in February 2014
Initial release	2014	2014	2010
Current release		3.2.0, April 2021
License Commercial or Open Source	Open Source MIT-License	Open Source Apache License 2.0	commercial
Cloud-based only Only available as a cloud service	no	no	yes
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Implementation language	JavaScript	Scala	Erlang
Server operating systems	server-less, requires a JavaScript environment (browser, Node.js)		hosted
Data scheme	schema-free	yes	schema-free
Typing predefined data types such as float or date	no	yes	no
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	no	no
Secondary indexes	no	yes	yes
SQL Support of SQL	Close to SQL99, but no user access control, stored procedures and host language bindings.	no	no
APIs and other access methods	JavaScript API		RESTful HTTP/JSON API
Supported programming languages	JavaScript		C# Java JavaScript Objective-C PHP Ruby
Server-side scripts Stored procedures	no	no	View functions (Map-Reduce) in JavaScript
Triggers	yes	no	yes
Partitioning methods Methods for storing different data on different nodes	none	depending on storage layer	Sharding
Replication methods Methods for redundantly storing data on multiple nodes	none	depending on storage layer	Multi-source replication Source-replica replication
MapReduce Offers an API for user-defined Map/Reduce methods	no	yes	yes
Consistency concepts Methods to ensure consistency in a distributed system	none	depending on storage layer	Eventual Consistency
Foreign keys Referential integrity	yes	no	no
Transaction concepts Support to ensure data integrity after non-atomic manipulations of data	yes only for local storage and DOM-storage	no	no atomic operations within a document possible
Concurrency Support for concurrent manipulation of data		yes	yes Optimistic locking
Durability Support for making data persistent	yes by using IndexedDB, SQL.JS or proprietary FileStorage	yes	yes
In-memory capabilities Is there an option to define some or all structures to be held in-memory only.	yes	depending on storage layer	no
User concepts Access control	no	yes depending on the DBMS used for storage	Access rights for users can be defined per database
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	AlaSQL	GeoMesa	IBM Cloudant
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