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LMDB vs. eXtremeDB

LMDB eXtremeDB + Add column
Preference (57% global votes) (47% global votes)
Website symas.​com/​mdb www.​mcobject.​com
Database model
Data storage
Embeddable Yes Yes
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 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
Secondary Indexes No Yes
Composite keys No Yes
Full text search No Yes
Geospatial Indexes No Yes
Graph support No Conditional
Horizontal scalable No Yes
Replication No Yes
Replication mode
Sharding No Yes
Shared nothing architecture ? Yes
Value size max. 4 GB 100 TB
System requirements
Operating system
Native driver
Memory minimum 64 kB 200 kB
Programming language
Description Memory-Mapped, Copy-on-Write Memory based database
Multi-user system Yes Yes
Price rating ★★★★★ ★★★☆☆
Software distribution
Release Date September 2011 12ᵗʰ September 2001
Documentation level ★★★★★ ★★★★☆
Lines of code 7 k ?
Free to use Yes No
Active Yes Yes
Real time analytics Yes Yes
Creation Date 2009 ?
Community Driven Good No
API Basic ?
Online backup Yes Yes
Function Based Index No ?
Implementation flexibility (50% global votes) (44% global votes)
Download gitorious.​org/​mdb ?
Backup functionality Good Excellent
Query Cache No Yes
Ease of use ★★★★☆ ★★★★☆
In-Place Update Yes Yes
Free for commercial use Yes No
Sorts Yes Yes
Read preferences No Yes
Open Source Yes No
Maximum size 9.2 EB ?
Perfomance ★★★★★ ★★★★★
JSON Yes Yes
Batch Loading Yes ?
Corruption Resistant Yes ?
Multilingual content ? Yes
WYSIWYG-Editor ? No
Standard compliance ? Yes
Object-Relational Mapping (ORM) ? No
3D Screen ? No
RESTful ? No
Database Connection Pooling ? Yes
Web interface ? Yes
Data encryption ? Yes
2 Letter Country Code ? US
Cloud platform support ?
Partial Index ? Yes
Log ? Yes
XInclude Support ? Yes
Triggers ? Yes
Cross Domain Testing ? Yes
Predictive Analytics ? No
Geospatial ? Yes
Text Analytics ? Yes
Server Side Java Script ? No
OData ? Yes
HTML5 Charts ? Yes
Decision Tables ? Yes
Flexible Table(Schema) ? Yes
Stored Procedure ? No
Concurrency ? Yes
Auto-Sharding ? Yes
Monitoring UI ? Yes
Online backup (no locking) ? Yes
CLI` ? Yes
+ Add row ++
LMDB eXtremeDB
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