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LMDB vs. Apache Accumulo

LMDB Apache Accumulo + Add column
Preference (57% global votes) (43% global votes)
Website symas.​com/​mdb accumulo.​apache.​org
Database model
Data storage
Embeddable Yes No
Query language
Data types
Conditional entry updates No Yes
Map and reduce No Yes
Unicode No Yes
TTL for entries No Yes
Compression No Yes
Integrity model
Atomicity Yes Conditional
Consistency Yes Yes
Isolation Yes Yes
Durability (data storage) Yes Yes
Transactions Yes No
Referential integrity No No
Revision control No Yes
Locking model
Secondary Indexes No Yes
Composite keys No Yes
Full text search No No
Geospatial Indexes No No
Graph support No Yes
Graph type ?
Horizontal scalable No Yes
Replication No Yes
Replication mode
Sharding No Yes
Shared nothing architecture ? Yes
Value size max. 4 GB 1 EB
System requirements
Operating system
Native driver
Memory minimum 64 kB 8 GB
Programming language
Description Memory-Mapped, Copy-on-Write A distributed database featuring cell level security and server-side computation
Multi-user system Yes Yes
Price rating ★★★★★ ★★★★★
Software distribution
Release Date September 2011 September 2011
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 Basic
API Basic Basic
Online backup Yes ?
Function Based Index No ?
Implementation flexibility (50% global votes) (50% global votes)
Download gitorious.​org/​mdb accumulo.​apache.​org/​downloads/​
Backup functionality Good ?
Query Cache No Yes
Ease of use ★★★★☆ ★★★☆☆
In-Place Update 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
Multiple projects ? Yes
Standard compliance ? Yes
RESTful ? No
Distributed Counter ? Yes
Database Connection Pooling ? Yes
Log ? Yes
Level of access authorization ?
Server Side Java Script ? No
Flexible Table(Schema) ? No
Fully Distributed ? Yes
Stored Procedure ? No
Concurrency ? Yes
Auto-Sharding ? Yes
Free edition ? Yes
Kafka Integration ? Yes
SQL Queries ? No
420 Friendly? ? Yes
Recursive queries ? No
CLI` ? Yes
Hadoop Integration ? Yes
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LMDB Apache Accumulo
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