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LMDB vs. LevelDB

LMDB LevelDB + Add column
Category
Preference 75% votes 25% votes
Website symas.​com/​mdb www.​oracle.​com/​database/​b…b/​index.​html
License
Design
Database model
Data storage
Embeddable Yes Yes
Features
Query language
Data types ?
Conditional entry updates No Yes
Map and reduce No No
Unicode No Yes
TTL for entries No No
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 No
Revision control No ?
Locking model ?
Indexing
Secondary Indexes No Yes
Composite keys No Yes
Full text search No Yes
Geospatial Indexes No No
Graph support No No
Distribution
Horizontal scalable No Yes
Replication No Yes
Replication mode
Sharding No No
Restrictions
Value size max. 4 GB 4 GB
System requirements
Operating system
Native driver
Memory minimum 64 kB ?
Architecture
Programming language
More
Description Memory-Mapped, Copy-on-Write key/value database
Brand
Multi-user system Yes Yes
Database ?
Price rating ★★★★★ ?
Software distribution ?
Release Date September 2011 ?
Documentation level ★★★★★ ★★★★☆
Lines of code 7 k 1 748 k
Free to use Yes Yes
Active Yes Yes
Real time analytics Yes ?
Creation Date 2009 1994
Community Driven Good Good
API Basic ?
Online backup Yes ?
Function Based Index No ?
Implementation flexibility (50% global votes) (0% global votes)
Download gitorious.​org/​mdb www.​oracle.​com/​technetwor…iteId=ocomen
Backup functionality Good ?
Query Cache No ?
Ease of use ★★★★☆ ?
In-Place Update Yes ?
Free for commercial use Yes No
Sorts Yes Yes
Read preferences No ?
Open Source Yes ?
Maximum size 9.2 EB ?
Perfomance ★★★★★ ?
JSON Yes ?
Batch Loading Yes ?
Corruption Resistant Yes No
Distributed Counter ? Yes
Log ? Yes
+ Add row ++
LMDB LevelDB
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