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LMDB vs. Cassandra

LMDB Cassandra + Add column
Description Memory-Mapped, Copy-on-Write Second Generation Distributed Database
Multi-user system Yes Yes
Memory minimum 64 kB 8 GB
Operating system
Programming language
Website symas.​com/​mdb cassandra.​apache.​org
Database model
Query language
Transactions Yes Yes
Unicode No Yes
Referential integrity No No
Price rating ★★★★★ ★★☆☆☆
Sharding No Yes
Replication No Yes
Map and reduce No Yes
Revision control No Yes
Atomicity Yes Yes
Consistency Yes Yes
Isolation Yes Yes
Durability (data storage) Yes Yes
Horizontal scalable No Yes
Integrity model
Software distribution ?
Full text search No No
Preference (57% global votes) (0% global votes)
Release Date September 2011 ?
Documentation level ★★★★★ ★★★★☆
Lines of code 7 k ?
TTL for entries No Yes
Value size max. 4 GB 2 GB
Conditional entry updates No Yes
Composite keys No Yes
Free to use Yes Yes
Active Yes Yes
Compression No Yes
Real time analytics Yes ?
Creation Date 2009 ?
Community Driven Good ?
API Basic ?
Secondary Indexes No Yes
Graph support No Yes
Embeddable Yes Yes
Geospatial Indexes No No
Locking model
Data storage
Replication mode
Native driver
Online backup Yes ?
Data types
Function Based Index No ?
Implementation flexibility (50% global votes) (0% global votes)
Download gitorious.​org/​mdb ?
Backup functionality Good ?
Query Cache No ?
Ease of use ★★★★☆ ?
In-Place Update Yes ?
Free for commercial use Yes ?
Sorts Yes ?
Read preferences No ?
Open Source Yes Yes
Maximum size 9.2 EB ?
Perfomance ★★★★★ ?
JSON Yes ?
Batch Loading Yes ?
Corruption Resistant Yes ?
Extension/Plug-in ? Yes
Standard compliance ? Yes
Shared nothing architecture ? Yes
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LMDB Cassandra
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