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LMDB vs. CouchDB

LMDB CouchDB + Add column
Category
Preference (55% global votes) (35% global votes)
Website symas.​com/​mdb couchdb.​apache.​org
License
Design
Database model
Data storage
Embeddable Yes Yes
Features
Query language
Data types
Conditional entry updates No Yes
Map and reduce No Yes
Unicode No Yes
TTL for entries No ?
Compression No Yes
Integrity
Integrity model
Atomicity Yes Yes
Consistency Yes Yes
Isolation Yes Yes
Durability (data storage) Yes Yes
Transactions Yes Yes
Referential integrity No No
Revision control No Yes
Locking model
Indexing
Secondary Indexes No No
Composite keys No Yes
Full text search No No
Geospatial Indexes No No
Graph support No No
Distribution
Horizontal scalable No No
Replication No Yes
Replication mode
Sharding No Yes
Shared nothing architecture ? Yes
Restrictions
Value size max. 4 GB ?
System requirements
Operating system
Native driver
Memory minimum 64 kB ?
Architecture
Programming language
More
Description Memory-Mapped, Copy-on-Write Document Oriented Database
Brand
Multi-user system Yes Yes
Database
Price rating ★★★★★ ★★★★★
Software distribution
Release Date September 2011 2005
Documentation level ★★★★★ ★★★★☆
Lines of code 7 k 164 k
Free to use Yes Yes
Active Yes Yes
Real time analytics Yes Yes
Creation Date 2009 ?
Community Driven Good Good
API Basic Good
Online backup Yes Yes
Function Based Index No Yes
Implementation flexibility (50% global votes) (0% global votes)
Download gitorious.​org/​mdb https:/​/​couchdb.​apache.​org/​#download
Backup functionality Good Good
Query Cache No Yes
Ease of use ★★★★☆ ★★★★★
In-Place Update Yes Yes
Free for commercial use Yes Yes
Sorts Yes Yes
Read preferences No ?
Open Source Yes Yes
Maximum size 9.2 EB ?
Perfomance ★★★★★ ★★★★★
JSON Yes Yes
Batch Loading Yes ?
Corruption Resistant Yes ?
Standard compliance ? Yes
Synchronisation ?
RESTful ? Yes
WSDL ? No
Web interface ? Yes
Data encryption ? No
Cloud platform support ?
Log ? Yes
Tuneable write concerns ? Yes
Server side custom code ? Yes
Geospatial ? Yes
Server Side Java Script ? Yes
Flexible Table(Schema) ? Yes
Geo-distributed ? Yes
Ajax ? Yes
Re-Reduce ? Yes
Auto-Sharding ? No
Contributors ? 102
Free edition ? Yes
Monitoring UI ? Yes
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LMDB CouchDB
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