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LevelDB vs. CouchDB

LevelDB CouchDB + Add column
Description Key/Value database Document Oriented Database
Multi-user system No Yes
Memory minimum 0 B ?
Operating system
Programming language
Website leveldb.​org couchdb.​apache.​org
Database model
Query language
Transactions No Yes
Unicode Yes Yes
Referential integrity No No
Price rating ★★★★★ ★★★★★
Sharding No Yes
Replication No Yes
Map and reduce No Yes
Revision control No Yes
Atomicity Yes Yes
Consistency Yes Yes
Isolation No Yes
Durability (data storage) Yes Yes
Horizontal scalable No Yes
Software distribution
Full text search No No
Preference (34% global votes) (35% global votes)
Documentation level ★★☆☆☆ ★★★★☆
Lines of code 15.5 k 164 k
TTL for entries No ?
Conditional entry updates Yes Yes
Composite keys Yes Yes
Free to use Yes Yes
Active Yes Yes
Database Connection Pooling No ?
Compression Yes Yes
Real time analytics No Yes
Creation Date 2011 June 2008
Community Driven Good Good
Web interface No Yes
Secondary Indexes No Yes
Graph support No No
Embeddable Yes Yes
Geospatial Indexes No No
Data storage
Native driver
Online backup No Yes
Data types
Partial Index No ?
Function Based Index No Yes
Log Yes Yes
Implementation flexibility (40% global votes) (20% global votes)
Download https:/​/​code.​google.​com/​p…wnloads/​list https:/​/​couchdb.​apache.​org/​#download
Backup functionality No Good
Query Cache Yes Yes
Ease of use ★★★★☆ ★★★★★
In-Place Update Yes Yes
Free for commercial use Yes Yes
Sorts Yes Yes
Open Source Yes Yes
Maximum size 1 000 000 000 EB ?
Perfomance ★★★★☆ ★★★★★
JSON Yes Yes
Ajax Yes Yes
Batch Loading Yes ?
Corruption Resistant No ?
Free edition Yes Yes
Does your mom understand it No No
Standard compliance ? Yes
Integrity model ?
Synchronisation ?
Release Date ? 2005
RESTful ? Yes
Shared nothing architecture ? Yes
Data encryption ? No
API ? Good
Locking model ?
Replication mode ?
Cloud platform support ?
Tuneable write concerns ? Yes
Server side custom code ? Yes
Materialized Views ? Yes
Geospatial ? Yes
Server Side Java Script ? Yes
Flexible Table(Schema) ? Yes
Geo-distributed ? Yes
Re-Reduce ? Yes
Fully Distributed ? Yes
Concurrency ? Yes
Auto-Sharding ? No
Contributors ? 102
Multi-statement Transactions ? No
memcached protocol ? No
Monitoring UI ? Yes
CLI` ? No
+ Add row ++
LevelDB CouchDB
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