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DBMS > HarperDB vs. Memcached vs. Microsoft SQL Server vs. QuestDB vs. Riak KV

System Properties Comparison HarperDB vs. Memcached vs. Microsoft SQL Server vs. QuestDB vs. Riak KV

Editorial information provided by DB-Engines
NameHarperDB  Xexclude from comparisonMemcached  Xexclude from comparisonMicrosoft SQL Server  Xexclude from comparisonQuestDB  Xexclude from comparisonRiak KV  Xexclude from comparison
DescriptionHarperDB takes the "stack" out of "tech stack" by combining an ultra-fast document-style data store, in-memory cache, real-time message broker, and your application components into a single distributed technology.In-memory key-value store, originally intended for cachingMicrosofts flagship relational DBMSA high performance open source SQL database for time series dataDistributed, fault tolerant key-value store
Primary database modelDocument storeKey-value storeRelational DBMSTime Series DBMSKey-value store infowith links between data sets and object tags for the creation of secondary indexes
Secondary database modelsDocument store
Graph DBMS
Spatial DBMS
Relational DBMS
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score0.55
Rank#243  Overall
#38  Document stores
Score16.84
Rank#32  Overall
#4  Key-value stores
Score807.76
Rank#3  Overall
#3  Relational DBMS
Score2.81
Rank#98  Overall
#7  Time Series DBMS
Score3.84
Rank#76  Overall
#9  Key-value stores
Websitewww.harperdb.iowww.memcached.orgwww.microsoft.com/­en-us/­sql-serverquestdb.io
Technical documentationdocs.harperdb.io/­docsgithub.com/­memcached/­memcached/­wikilearn.microsoft.com/­en-US/­sql/­sql-serverquestdb.io/­docswww.tiot.jp/­riak-docs/­riak/­kv/­latest
DeveloperHarperDBDanga Interactive infooriginally developed by Brad Fitzpatrick for LiveJournalMicrosoftQuestDB Technology IncOpenSource, formerly Basho Technologies
Initial release20172003198920142009
Current release3.1, August 20211.6.29, June 2024SQL Server 2022, November 20223.2.0, December 2022
License infoCommercial or Open Sourcecommercial infofree community edition availableOpen Source infoBSD licensecommercial inforestricted free version is availableOpen Source infoApache 2.0Open Source infoApache version 2, commercial enterprise edition
Cloud-based only infoOnly available as a cloud servicenonononono
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageNode.jsCC++Java (Zero-GC), C++, RustErlang
Server operating systemsLinux
OS X
FreeBSD
Linux
OS X
Unix
Windows
Linux
Windows
Linux
macOS
Windows
Linux
OS X
Data schemedynamic schemaschema-freeyesyes infoschema-free via InfluxDB Line Protocolschema-free
Typing infopredefined data types such as float or dateyes infoJSON data typesnoyesyesno
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.noyesnono
Secondary indexesyesnoyesnorestricted
SQL infoSupport of SQLSQL-like data manipulation statementsnoyesSQL with time-series extensionsno
APIs and other access methodsJDBC
ODBC
React Hooks
RESTful HTTP/JSON API
WebSocket
Proprietary protocolADO.NET
JDBC
ODBC
OLE DB
Tabular Data Stream (TDS)
HTTP REST
InfluxDB Line Protocol (TCP/UDP)
JDBC
PostgreSQL wire protocol
HTTP API
Native Erlang Interface
Supported programming languages.Net
C
C#
C++
ColdFusion
D
Dart
Delphi
Erlang
Go
Haskell
Java
JavaScript (Node.js)
Lisp
MatLab
Objective C
Perl
PHP
PowerShell
Prolog
Python
R
Ruby
Rust
Scala
Swift
.Net
C
C++
ColdFusion
Erlang
Java
Lisp
Lua
OCaml
Perl
PHP
Python
Ruby
C#
C++
Delphi
Go
Java
JavaScript (Node.js)
PHP
Python
R
Ruby
Visual Basic
C infoPostgreSQL driver
C++
Go
Java
JavaScript (Node.js)
Python
Rust infoover HTTP
C infounofficial client library
C#
C++ infounofficial client library
Clojure infounofficial client library
Dart infounofficial client library
Erlang
Go infounofficial client library
Groovy infounofficial client library
Haskell infounofficial client library
Java
JavaScript infounofficial client library
Lisp infounofficial client library
Perl infounofficial client library
PHP
Python
Ruby
Scala infounofficial client library
Smalltalk infounofficial client library
Server-side scripts infoStored proceduresCustom Functions infosince release 3.1noTransact SQL, .NET languages, R, Python and (with SQL Server 2019) JavanoErlang
Triggersnonoyesnoyes infopre-commit hooks and post-commit hooks
Partitioning methods infoMethods for storing different data on different nodesA table resides as a whole on one (or more) nodes in a clusternonetables can be distributed across several files (horizontal partitioning); sharding through federationhorizontal partitioning (by timestamps)Sharding infono "single point of failure"
Replication methods infoMethods for redundantly storing data on multiple nodesyes infothe nodes on which a table resides can be definednone infoRepcached, a Memcached patch, provides this functionallityyes, but depending on the SQL-Server EditionSource-replica replication with eventual consistencyselectable replication factor
MapReduce infoOffers an API for user-defined Map/Reduce methodsnonononoyes
Consistency concepts infoMethods to ensure consistency in a distributed systemImmediate ConsistencyImmediate ConsistencyImmediate ConsistencyEventual Consistency
Foreign keys infoReferential integritynonoyesnono infolinks between data sets can be stored
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of dataAtomic execution of specific operationsnoACIDACID for single-table writesno
Concurrency infoSupport for concurrent manipulation of datayesyesyesyesyes
Durability infoSupport for making data persistentyes, using LMDBnoyesyesyes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.yesyesyes infothrough memory mapped files
User concepts infoAccess controlAccess rights for users and rolesyes infousing SASL (Simple Authentication and Security Layer) protocolfine grained access rights according to SQL-standardyes, using Riak Security
More information provided by the system vendor
HarperDBMemcachedMicrosoft SQL ServerQuestDBRiak KV
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