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DBMS > ClickHouse vs. EJDB vs. Google Search Appliance

System Properties Comparison ClickHouse vs. EJDB vs. Google Search Appliance

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Editorial information provided by DB-Engines
NameClickHouse  Xexclude from comparisonEJDB  Xexclude from comparisonGoogle Search Appliance  Xexclude from comparison
DescriptionColumn-oriented Relational DBMS powering YandexEmbeddable document-store database library with JSON representation of queries (in MongoDB style)The Google Search Appliance consists of hardware and software for indexing documents in local networks.
Primary database modelRelational DBMSDocument storeSearch engine
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score3.33
Rank#82  Overall
#41  Relational DBMS
Score0.18
Rank#262  Overall
#36  Document stores
Score2.77
Rank#94  Overall
#10  Search engines
Websiteclickhouse.yandexejdb.orgenterprise.google.com/­search/­products/­gsa.html
Technical documentationclickhouse.yandex/­docsgithub.com/­Softmotions/­ejdb/­blob/­master/­README.mdsupport.google.com/­gsa
DeveloperYandex LLCSoftmotionsGoogle
Initial release201620122002
Current releasev19.13.3.26, August 2019
License infoCommercial or Open SourceOpen Source infoApache 2.0Open Source infoGPLv2commercial
Cloud-based only infoOnly available as a cloud servicenonono
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageC
Server operating systemsserver-less
Data schemeschema-free
Typing infopredefined data types such as float or dateyes infostring, integer, double, bool, date, object_id
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.no
Secondary indexesno
SQL infoSupport of SQLnono
APIs and other access methodsin-process shared libraryAdministrative API
Browser interface
HTTP API
Supported programming languagesActionscript
C
C#
C++
Go
Java
JavaScript (Node.js)
Lua
Objective-C
Pike
Python
Ruby
Server-side scripts infoStored proceduresno
Triggersno
Partitioning methods infoMethods for storing different data on different nodesnoneSharding
Replication methods infoMethods for redundantly storing data on multiple nodesnoneMaster-slave replication
MapReduce infoOffers an API for user-defined Map/Reduce methodsnono
Foreign keys infoReferential integrityno infotypically not needed, however similar functionality with collection joins possibleno
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of datano
Concurrency infoSupport for concurrent manipulation of datayes infoRead/Write Lockingyes
Durability infoSupport for making data persistentyesyes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.no
User concepts infoAccess controlnoUser authentication via various security protocols

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More resources
ClickHouseEJDBGoogle Search Appliance
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