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LMDB vs. PostgreSQL

LMDB PostgreSQL + Add column
Category
Preference (57% global votes) (66% global votes)
Website symas.​com/​mdb postgresql.​org
License
Design
Database model
Data storage
Embeddable Yes No
Features
Query language
Data types
Conditional entry updates No Yes
Map and reduce No No
Unicode No Yes
TTL for entries No Yes
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 Yes
Revision control No ?
Locking model
Indexing
Secondary Indexes No Yes
Composite keys No Yes
Full text search No Yes
Geospatial Indexes No Yes
Graph support No Conditional
Distribution
Horizontal scalable No Yes
Replication No Yes
Replication mode
Sharding No Yes
Restrictions
Value size max. 4 GB 1 GB
System requirements
Operating system
Native driver
Memory minimum 64 kB 32 MB
Architecture
Programming language
More
Description Memory-Mapped, Copy-on-Write Object-Relational Database Management System
Brand
Multi-user system Yes Yes
Database
Price rating ★★★★★ ★★★★★
Software distribution
Release Date September 2011 May 1995
Documentation level ★★★★★ ★★★★★
Lines of code 7 k 839 k
Free to use Yes Yes
Active Yes Yes
Real time analytics Yes Yes
Creation Date 2009 1995
Community Driven Good Good
API Basic Good
Online backup Yes Yes
Function Based Index No Yes
Implementation flexibility (50% global votes) (77% global votes)
Download gitorious.​org/​mdb www.​postgresql.​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 Yes
Open Source Yes Yes
Maximum size 9.2 EB ?
Perfomance ★★★★★ ★★★★★
JSON Yes Yes
Batch Loading Yes Yes
Corruption Resistant Yes ?
Extension/Plug-in ? Yes
Multilingual content ? Yes
WYSIWYG-Editor ? Yes
Multiple projects ? Yes
Standard compliance ? Yes
Object-Relational Mapping (ORM) ? Yes
RESTful ? Yes
Database Connection Pooling ? Yes
Web interface ? Yes
Data encryption ? Yes
XML Aware ? Good
Color ?
Cloud platform support ?
Partial Index ? Yes
Log ? Yes
Level of access authorization ?
Tuneable write concerns ? Yes
Op/s ? 1 000 005
XQuery Support ? Yes
Triggers ? Yes
Server side custom code ? Yes
Cloud-enabled ? Yes
Minimal memory footprint ? 32 MB
Multivariate Testing ? Yes
Materialized Views ? Yes
Pipeline Aggregation ? Yes
Spring Data Support ? Yes
Geospatial ? Yes
Text Analytics ? Yes
Server Side Java Script ? Yes
HTML5 Charts ? No
Flexible Table(Schema) ? Yes
Geo-distributed ? Yes
ORM Join Support ? Yes
Fully Distributed ? Yes
Stored Procedure ? Yes
Concurrency ? Yes
Auto-Sharding ? No
Contributors ? 21
24/7 support ? Yes
Free edition ? Yes
SQL Queries ? Yes
User and Group role based security model ? Yes
3D Support ? No
Monitoring UI ? Yes
Recursive queries ? Yes
Network datatype ? Yes
Windowed aggregate ? Yes
Online backup (no locking) ? Yes
CLI` ? Yes
Point In Time Recovery ? Yes
+ Add row ++
LMDB PostgreSQL
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