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LevelDB vs. LMDB

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