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LMDB vs. eXist-db

LMDB eXist-db + Add column
Preference (57% global votes) (55% global votes)
Website symas.​com/​mdb exist-db.​org
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 ?
Compression No Yes
Integrity model
Atomicity Yes Yes
Consistency Yes Yes
Isolation Yes ?
Durability (data storage) Yes Yes
Transactions Yes Conditional
Referential integrity No No
Revision control No ?
Locking model
Secondary Indexes No Yes
Composite keys No ?
Full text search No Yes
Geospatial Indexes No Yes
Graph support No Yes
Horizontal scalable No No
Replication No Yes
Replication mode
Sharding No No
Shared nothing architecture ? No
Value size max. 4 GB ?
System requirements
Operating system
Native driver
Memory minimum 64 kB ?
Programming language
Description Memory-Mapped, Copy-on-Write XML Database
Brand ?
Multi-user system Yes Yes
Database ?
Price rating ★★★★★ ★★★★★
Software distribution
Release Date September 2011 2000
Documentation level ★★★★★ ★★★★☆
Lines of code 7 k ?
Free to use Yes Yes
Active Yes Yes
Real time analytics Yes Yes
Creation Date 2009 ?
Community Driven Good Yes
API Basic Good
Online backup Yes ?
Function Based Index No ?
Implementation flexibility (50% global votes) (50% global votes)
Download gitorious.​org/​mdb https:/​/​bintray.​com/​exist…leases/​exist
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 ?
Extension/Plug-in ? Yes
Multilingual content ? Yes
WYSIWYG-Editor ? Yes
Multiple projects ? Yes
Standard compliance ? Yes
Template language ?
Target audience ?
Object-Relational Mapping (ORM) ? No
RESTful ? Yes
Dynamic typing ? No
Programming paradigm ?
Comments ? Yes
Web interface ? Yes
Versioning ? Good
XML Aware ? Good
Color ?
Log ? Yes
Community feedback ? ★★★★☆
Easy of Use ? Yes
XInclude Support ? Yes
XUpdate Support ? Yes
XQuery Support ? Yes
Triggers ? Yes
Cloud-enabled ? Yes
Geospatial ? Yes
Free edition ? Yes
? Yes
Monitoring UI ? Yes
Recursive queries ? Yes
+ Add row ++
LMDB eXist-db
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