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DBMS > NSDb vs. Realm vs. TDSQL for MySQL vs. VoltDB

System Properties Comparison NSDb vs. Realm vs. TDSQL for MySQL vs. VoltDB

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Editorial information provided by DB-Engines
NameNSDb  Xexclude from comparisonRealm  Xexclude from comparisonTDSQL for MySQL  Xexclude from comparisonVoltDB  Xexclude from comparison
DescriptionScalable, High-performance Time Series DBMS designed for Real-time Analytics on top of KubernetesA DBMS built for use on mobile devices that’s a fast, easy to use alternative to SQLite and Core DataA high-performance distributed database management system with features such as automatic sharding, intelligent operation and maintenance, elastic scalability without downtime, and enterprise-grade security. It is highly compatible with MySQL.Distributed In-Memory NewSQL RDBMS infoUsed for OLTP applications with a high frequency of relatively simple transactions, that can hold all their data in memory
Primary database modelTime Series DBMSDocument storeRelational DBMSRelational DBMS
Secondary database modelsDocument store
Spatial DBMS
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score0.08
Rank#369  Overall
#40  Time Series DBMS
Score7.41
Rank#52  Overall
#8  Document stores
Score0.85
Rank#207  Overall
#97  Relational DBMS
Score1.47
Rank#157  Overall
#73  Relational DBMS
Websitensdb.iorealm.iowww.tencentcloud.com/­products/­dcdbwww.voltdb.com
Technical documentationnsdb.io/­Architecturerealm.io/­docswww.tencentcloud.com/­document/­product/­1042docs.voltdb.com
DeveloperRealm, acquired by MongoDB in May 2019TencentVoltDB Inc.
Initial release2017201420132010
Current release11.3, April 2022
License infoCommercial or Open SourceOpen Source infoApache Version 2.0Open SourcecommercialOpen Source infoAGPL for Community Edition, commercial license for Enterprise, AWS, and Pro Editions
Cloud-based only infoOnly available as a cloud servicenonoyesno
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageJava, ScalaJava, C++
Server operating systemsLinux
macOS
Android
Backend: server-less
iOS
Windows
hostedLinux
OS X infofor development
Data schemeyesyesyes
Typing infopredefined data types such as float or dateyes: int, bigint, decimal, stringyesyesyes
XML support infoSome form of processing data in XML format, e.g. support for XML data structures, and/or support for XPath, XQuery or XSLT.nonono
Secondary indexesall fields are automatically indexedyesyesyes
SQL infoSupport of SQLSQL-like query languagenoyesyes infoonly a subset of SQL 99
APIs and other access methodsgRPC
HTTP REST
WebSocket
JDBC
ODBC
Java API
JDBC
RESTful HTTP/JSON API
Supported programming languagesJava
Scala
.Net
Java infowith Android only
Objective-C
React Native
Swift
C
C#
C++
Java
PHP
Python
Ruby
C#
C++
Erlang infonot officially supported
Go
Java
JavaScript infoNode.js
PHP
Python
Server-side scripts infoStored proceduresnono inforuns within the applications so server-side scripts are unnecessaryyesJava
Triggersyes infoChange Listenersyesno
Partitioning methods infoMethods for storing different data on different nodesShardingnoneAutomatic shardingSharding
Replication methods infoMethods for redundantly storing data on multiple nodesnoneMulti-source replication
Source-replica replication
Multi-source replication
Source-replica replication
MapReduce infoOffers an API for user-defined Map/Reduce methodsnononono
Consistency concepts infoMethods to ensure consistency in a distributed systemEventual ConsistencyImmediate ConsistencyImmediate Consistency
Foreign keys infoReferential integritynononono infoFOREIGN KEY constraints are not supported
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of datanoACIDACIDACID infoTransactions are executed single-threaded within stored procedures
Concurrency infoSupport for concurrent manipulation of datayesyesyes infoData access is serialized by the server
Durability infoSupport for making data persistentUsing Apache Luceneyesyesyes infoSnapshots and command logging
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.yes infoIn-Memory realmno
User concepts infoAccess controlyesUsers with fine-grained authorization conceptUsers and roles with access to stored procedures

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NSDbRealmTDSQL for MySQLVoltDB
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