CrateDB Cloud: a distributed SQL database that spreads data and processing across an elastic cluster of shared nothing nodes. CrateDB Cloud enables data insights at scale on Microsoft Azure, AWS and Google Cloud Platform.

Aiven for PostgreSQL: Fully managed PostgreSQL for developers with 70+ extensions and flexible orchestration tools.
PostgreSQL Flex @ STACKIT offers managed PostgreSQL Instances with adjustable CPU, RAM, storage amount and speed and several extensions available, in enterprise grade to perfectly match all application requirements. All 100% GDPR-compliant.

Scylla Cloud: Create real-time applications that run at global scale with Scylla Cloud, the industry’s most powerful NoSQL DBaaS

Implementierungssprache

Java

C und C++

C++

Server Betriebssysteme

All Operating Systems, including Kubernetes with CrateDB Kubernetes Operator support

AIX
HP-UX
Linux
OS X
Solaris
Windows
z/OS

Linux
macOS

FreeBSD
HP-UX
Linux
NetBSD
OpenBSD
OS X
Solaris
Unix
Windows

Linux

Datenschema

Flexible Schema (defined schema, partial schema, schema free)

Schemaless in JSON and XML columns

schemafrei

Typisierung

vordefinierte Datentypen, z.B. float oder date

XML Unterstützung

Verarbeitung von Daten in XML Format, beispielsweise Speicherung von XML-Strukturen und/oder Unterstützung von XPath, XQuery, XSLT

nein

XML type, but no XML query functionality

specific XML-type available, but no XML query functionality.

nein

Sekundärindizes

cluster global secondary indices

SQL

Support of SQL

yes, but no triggers and constraints, and PostgreSQL compatibility

mit proprietären Erweiterungen

distributed, parallel query execution

Standard mit zahlreichen Erweiterungen

SQL-like DML and DDL statements (CQL)

APIs und andere Zugriffskonzepte

ADO.NET
JDBC
ODBC
PostgreSQL wire protocol
Prometheus Remote Read/Write
RESTful HTTP API

JDBC
ODBC
ODP.NET
Oracle Call Interface (OCI)

ADO.NET
JDBC
native C library
ODBC
streaming API for large objects

Proprietäres Protokoll

compatible with CQL (Cassandra Query Language, an SQL-like language)
RESTful HTTP API (DynamoDB compatible)
Thrift

Unterstützte Programmiersprachen

.NET
Erlang
Go

community maintained client
Java
JavaScript (Node.js)

community maintained client
Perl

community maintained client
PHP
Python
R
Ruby

community maintained client
Scala

community maintained client

C
C#
C++
Clojure
Cobol
Delphi
Eiffel
Erlang
Fortran
Groovy
Haskell
Java
JavaScript
Lisp
Objective C
OCaml
Perl
PHP
Python
R
Ruby
Scala
Tcl
Visual Basic

.Net
C
C++
Delphi
Erlang
Java
JavaScript (Node.js)
Perl
PHP
Python
Tcl

.Net
C
C++
Delphi
Java

JDBC
JavaScript (Node.js)
Perl
PHP
Python
Tcl

For CQL interface: C#, C++, Clojure, Erlang, Go, Haskell, Java, JavaScript, Node.js, Perl, PHP, Python, Ruby, Rust, Scala
For DynamoDB interface: .Net, ColdFusion, Erlang, Groovy, Java, JavaScript, Perl, PHP, Python, Ruby

Server-seitige Scripts

Stored Procedures

benutzerdefinierte Funktionen

PL/SQL

auch Java stored procedures möglich

benutzerdefinierte Funktionen

realisiert z.B. mit spezifischer Sprache PL/pgSQL, aber auch andere Sprachen möglich (Perl, Python, Tcl, etc.)

yes, Lua

Triggers

nein

Partitionierungsmechanismen

Methoden zum Speichern von unterschiedlichen Daten auf unterschiedlichen Knoten

Sharding

Sharding, horizontal partitioning

horizontale Partitionierung

partitioning by range, list and (since PostgreSQL 11) by hash

Sharding

Replikationsmechanismen

Methoden zum redundanten Speichern von Daten auf mehreren Knoten

Configurable replication on table/partition-level

Multi-Source Replikation
Source-Replica Replikation

Source-Replica Replikation

andere Varianten durch Verwendung von 3rd party - tools

frei wählbarer Replikationsfaktor

Representation of geographical distribution of servers is possible

MapReduce

Bietet ein API für Map/Reduce Operationen

nein

kann in PL/SQL realisiert werden

nein

Konsistenzkonzept

Methoden zur Sicherstellung der Konsistenz in einem verteilten System

Eventual Consistency
Read-after-write consistency on record level

Immediate Consistency

Eventual Consistency
Tunable Consistency

can be individually decided for each write operation

Fremdschlüssel

referenzielle Integrität

nein

Transaktionskonzept

Unterstützung zur Sicherstellung der Datenintegrität bei nicht-atomaren Datenmanipulationen

nein

unique row identifiers can be used for implementing an optimistic concurrency control strategy

ACID

mit parameterisierbarem isolation level

ACID

MVCC

ACID

nein

Atomicity and isolation are supported for single operations

Concurrency

Unterstützung von gleichzeitig ausgeführten Datenmanipulationen

Durability

Dauerhafte Speicherung der Daten

In-Memory Unterstützung

Gibt es Möglichkeiten einige oder alle Strukturen nur im Hauptspeicher zu halten

nein

Version 12c introduced the new option 'Oracle Database In-Memory'

nein

in-memory tables

Berechtigungskonzept

Zugriffskontrolle

Rechteverwaltung mit Benutzeraccounts

Benutzer mit feingranularem Berechtigungskonzept entsprechend SQL-Standard

Access rights for users can be defined per object

Weitere Informationen bereitgestellt vom Systemhersteller

Specific characteristics

The enterprise database for time series, documents, and vectors. Distributed - Native...
» mehr

ScyllaDB is engineered to deliver predictable performance at scale. It’s adopted...
» mehr

Competitive advantages

Response time in milliseconds: e ven for complex ad-hoc queries. Massive scaling...
» mehr

Highly-performant (efficiently utilizes full resources of a node and network; millions...
» mehr

Typical application scenarios

IoT: accelerate your IIoT projects with CrateDB, delivering real-time analytics...
» mehr

ScyllaDB is ideal for applications that require high throughput and low latency at...
» mehr

Key customers

Across all continents, CrateDB is used by companies of all sizes to meet the most...
» mehr

Discord, Epic Games, Expedia, Zillow, Comcast, Disney+ Hotstar, Samsung, ShareChat,...
» mehr

Market metrics

The CrateDB open source project was started in 2013 Honorable Mention in 2021 Gartner®...
» mehr

ScyllaDB typically offers ~75% total cost of ownership savings, with ~5X higher throughput...
» mehr

Licensing and pricing models

See CrateDB pricing >
» mehr

ScyllaDB Open Source - free open source software (AGPL) ScyllaDB Enterprise - subscription-based...
» mehr

Wir laden Vertreter der Systemhersteller ein uns zu kontaktieren, um die Systeminformationen zu aktualisieren und zu ergänzen,
sowie um Herstellerinformationen wie Schlüsselkunden, Vorteile gegenüber Konkurrenten und Marktmetriken anzuzeigen.

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Drittanbieter

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