I have recently trying to understand different NoSql databases. I found MongoDb, CouchDb & Riak and compared their features. Below is my understanding.
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Features
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MongoDb
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CouchDb
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Riak
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Client api support
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Yes
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Yes (only community support)
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Yes
|
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Open-source client libraries
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C, C++, C#, Erlang, Java, JavaScript, Node.js, Perl, PHP,
Python, Ruby, Scala.
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Clojure, Common Lisp, Erlang, Java, JavaScript, Lua, .Net,
Node.js, Perl, PHP, PL/SQL, Python, Ruby, Scala
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Erlang, Java, PHP, Python, Ruby
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Clustering
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Master-Slave
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Master-Master
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Masterless
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Sharding
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Yes
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-
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Yes
|
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Environment Supported
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Windows, Linux, Mac OS X, Solaris
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Windows, Mac OS X, Linux
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Debian, Ubuntu, FreeBSD, Mac, Red Hat Enterprise, Fedora,
SmartOS, Solaris
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Windows Installation
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Yes
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Yes
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No
|
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Doc Link
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|||
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Replication
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Yes
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Yes
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Yes
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Writes allowed on all nodes
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NO
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Yes
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Yes
|
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Clustering/sharding available built-in
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Yes
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No
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Yes
|
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Replication available built-in
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Yes
|
Yes
|
Yes
|
|
CAP Theorem
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CP
|
AP
|
AP
|
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License
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AGPL (Drivers: Apache)
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Apache
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Apache
|
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Commercial/Enterprise licenses
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Yes
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No
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Yes
|
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Storage Type
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Document Oriented (BSON )
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Document Oriented (JSON )
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Bucket, key/value
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