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LMDB vs. Postgres

LMDB Postgres + Add column
Description Memory-Mapped, Copy-on-Write Relational Database System
Multi-user system Yes Yes
Memory minimum 64 kB ?
Operating system
Programming language
Website symas.​com/​mdb www.​postgresql.​org
Database model
Query language
Transactions Yes Yes
Unicode No Yes
Referential integrity No Yes
Price rating ★★★★★ ★★★★★
Sharding No No
Replication No Yes
Map and reduce No No
Revision control No Yes
Atomicity Yes Yes
Consistency Yes Yes
Isolation Yes Yes
Durability (data storage) Yes Yes
Horizontal scalable No Yes
Integrity model
Software distribution
Full text search No Yes
Preference (57% global votes) (78% global votes)
Release Date September 2011 ?
Documentation level ★★★★★ ★★★★★
Lines of code 7 k 733 k
TTL for entries No No
Value size max. 4 GB ?
Conditional entry updates No Yes
Composite keys No Yes
Free to use Yes Yes
Active Yes Yes
Compression No Yes
Real time analytics Yes Yes
Creation Date 2009 1989
Community Driven Good Good
API Basic ?
Secondary Indexes No Yes
Graph support No ?
Embeddable Yes No
Geospatial Indexes No Yes
Locking model
Data storage
Replication mode
Native driver
Online backup Yes Yes
Data types
Function Based Index No Yes
Implementation flexibility (50% global votes) (0% global votes)
Download gitorious.​org/​mdb www.​postgresql.​org/​download/​
Backup functionality 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 ?
Extension/Plug-in ? Yes
Multilingual content ? Yes
WYSIWYG-Editor ? No
Standard compliance ? Yes
Object-Relational Mapping (ORM) ? Yes
Database Connection Pooling ? Yes
Shared nothing architecture ? Yes
Web interface ? Yes
Data encryption ? Yes
Cloud platform support ?
Partial Index ? Yes
Log ? Yes
Tuneable write concerns ? Yes
Triggers ? Yes
Materialized Views ? Yes
Spring Data Support ? Yes
Geospatial ? Yes
Text Analytics ? Yes
Server Side Java Script ? Yes
Stored Procedure ? Yes
Free edition ? Yes
SQL Queries ? Yes
Network datatype ? Yes
CLI` ? Yes
But can you use it on a cold rainy night in stoke? ? Yes
Does your boss understand it? ? Yes
+ Add row ++
LMDB Postgres
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