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Riak vs. DynamoDB

Riak DynamoDB + Add column
Preference (43% global votes) (34% global votes)
Website docs.​basho.​com aws.​amazon.​com/​DynamoDB/​
Database model
Data storage
Embeddable No No
Query language
Data types
Conditional entry updates No Yes
Map and reduce Yes No
Unicode Yes Yes
TTL for entries Yes Yes
Compression Yes Yes
Integrity model
Atomicity No Yes
Consistency Yes Yes
Isolation Yes Yes
Durability (data storage) Yes Yes
Transactions No Yes
Referential integrity No Yes
Revision control Yes Yes
Locking model No
Secondary Indexes Yes Yes
Composite keys Yes Yes
Full text search Yes Yes
Geospatial Indexes No No
Graph support No ?
Horizontal scalable Yes Yes
Replication Yes Yes
Replication mode
Sharding ? Yes
Shared nothing architecture Yes Yes
Value size max. 64 MB 64 kB
System requirements
Operating system
Native driver ?
Memory minimum 4 GB ?
Programming language
Description High performance key-value/document store. Key-value
Multi-user system Yes Yes
Standard compliance No ?
Software distribution
Release Date 17ᵗʰ August 2009 18ᵗʰ January 2012
Documentation level ★★★★★ ★★★★☆
RESTful Yes Yes
Lines of code 4.5 k ?
Distributed Counter Yes Yes
Free to use Yes Conditional
Active Yes Yes
Database Connection Pooling Yes No
Real time analytics Yes Yes
Creation Date 17ᵗʰ November 2009 ?
Community Driven Good No
Web interface No Yes
API Good Basic
Cloud platform support
Online backup Yes No
Log Yes Yes
Implementation flexibility (67% global votes) (0% global votes)
Download basho.​com/​resources/​downloads/​ ?
Backup functionality Good Basic
Query Cache Yes ?
Ease of use ★★★★★ ★★★★☆
Siblings Yes ?
In-Place Update Yes ?
Free for commercial use Yes Yes
Sorts Yes Yes
Tuneable write concerns Yes ?
Read preferences Yes ?
Open Source Yes ?
Perfomance ★★★★★ ★★★★☆
JSON Yes Yes
Flexible Table(Schema) Yes ?
Geo-distributed Yes Yes
Re-Reduce Yes ?
Free edition Yes Yes
Monitoring UI Yes No
Multilingual content ? Conditional
Price rating ? ★★★☆☆
Object-Relational Mapping (ORM) ? Yes
WSDL ? Yes
Function Based Index ? Yes
Cloud-enabled ? Yes
Materialized Views ? Yes
Spring Data Support ? Yes
Geospatial ? Yes
Text Analytics ? No
Server Side Java Script ? No
Fully Distributed ? Yes
Concurrency ? Yes
Auto-Sharding ? Yes
In business since ? 2012
24/7 support ? Yes
Multi-statement Transactions ? No
memcached protocol ? No
Does your mom understand it ? Yes
CLI` ? Yes
Lund ? Yes
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Riak DynamoDB
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