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LMDB vs. kdb+

LMDB kdb+ + Add column
Category
Preference (57% global votes) (67% global votes)
Website symas.​com/​mdb kx.​com
License
Design
Database model
Data storage
Embeddable Yes Yes
Features
Query language
Data types ?
Conditional entry updates No Yes
Map and reduce No Yes
Unicode No Yes
TTL for entries No Conditional
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 Yes
Revision control No Yes
Locking model
Indexing
Secondary Indexes No Yes
Composite keys No Yes
Full text search No Yes
Geospatial Indexes No Yes
Graph support No ?
Distribution
Horizontal scalable No Yes
Replication No Yes
Replication mode
Sharding No Yes
Shared nothing architecture ? Yes
Restrictions
Value size max. 4 GB 10 TB
System requirements
Operating system
Native driver
Memory minimum 64 kB 100 kB
Architecture
Programming language
More
Description Memory-Mapped, Copy-on-Write In memory, high performance columnar
Brand
Multi-user system Yes Yes
Database
Price rating ★★★★★ ★★★★★
Software distribution
Release Date September 2011 1993
Documentation level ★★★★★ ★★★★☆
Lines of code 7 k ?
Free to use Yes Conditional
Active Yes Yes
Real time analytics Yes Yes
Creation Date 2009 1993
Community Driven Good Good
API Basic Good
Online backup Yes Yes
Function Based Index No Yes
Implementation flexibility (50% global votes) (100% global votes)
Download gitorious.​org/​mdb https:/​/​kx.​com/​software-download.​php
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 Yes
Open Source Yes No
Maximum size 9.2 EB ?
Perfomance ★★★★★ ★★★★★
JSON Yes Yes
Batch Loading Yes Yes
Corruption Resistant Yes ?
Extension/Plug-in ? Yes
Standard compliance ? Yes
Object-Relational Mapping (ORM) ? Yes
RESTful ? Yes
Distributed Counter ? Yes
Database Connection Pooling ? Yes
Web interface ? Yes
Widgets Dashboard ? Good
Color ?
Cloud platform support ?
Geographic Replication ? Yes
Log ? Yes
Level of access authorization ?
Capped Collections ? Yes
Tuneable write concerns ? Yes
Event Driven Architecture ? Yes
Op/s ? 100 000
XInclude Support ? No
XQuery Support ? No
Maven support ? Yes
Global Assembly Cache ? Yes
Triggers ? Yes
Cloud-enabled ? Yes
Licenses model ?
Pipeline Aggregation ? Yes
Spring Data Support ? Yes
Predictive Analytics ? Yes
Geospatial ? Yes
Text Analytics ? Yes
Server Side Java Script ? Yes
Flexible Table(Schema) ? No
Geo-distributed ? Yes
Administrator responsive? ? Yes
Re-Reduce ? Yes
Clustering over WAN ? Yes
Fully Distributed ? Yes
Stored Procedure ? Yes
Second Level Caching ? Yes
Concurrency ? Yes
Auto-Sharding ? Yes
Native Adsense Integration ? No
Delta read ? Yes
Delta Update ? Yes
Aggregators ? Yes
Near cache ? Yes
Continuous query ? Yes
HTTP Session replication ? Yes
LDAP Integration ? Yes
In business since ? 1993
Number of systems in production ? 80 000
24/7 support ? Yes
Free edition ? Yes
Distributed code Deployment ? Yes
Dynamic code deployment ? Yes
DB Delta Server ? Yes
Rolling Upgrade ? Yes
Dynamic index ? Yes
Data Grid interceptors ? Yes
Replication interceptors ? Yes
Kafka Integration ? No
Drools Integration ? No
Storm Integration ? No
Offheap Memory ? Yes
In-Memory File System ? Yes
CEP Streaming ? Yes
SQL Queries ? Yes
memcached protocol ? Yes
Does your mom understand it ? No
Monitoring UI ? Yes
CLI` ? Yes
Web Page Caching ? Yes
Web Page Fragment Caching ? Yes
Abstracts complexity of UI Components ? Yes
Hadoop Integration ? Yes
Apache Spark Integration ? Yes
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LMDB kdb+
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