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DBMS > EJDB vs. Impala vs. Sequoiadb

System Properties Comparison EJDB vs. Impala vs. Sequoiadb

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Editorial information provided by DB-Engines
NameEJDB  Xexclude from comparisonImpala  Xexclude from comparisonSequoiadb  Xexclude from comparison
DescriptionEmbeddable document-store database library with JSON representation of queries (in MongoDB style)Analytic DBMS for HadoopNewSQL database with distributed OLTP and SQL
Primary database modelDocument storeRelational DBMSDocument store
Relational DBMS
Secondary database modelsDocument store
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score0.24
Rank#276  Overall
#39  Document stores
Score18.93
Rank#38  Overall
#23  Relational DBMS
Score0.46
Rank#244  Overall
#38  Document stores
#117  Relational DBMS
Websiteejdb.orgwww.cloudera.com/­products/­open-source/­apache-hadoop/­impala.htmlwww.sequoiadb.com
Technical documentationgithub.com/­Softmotions/­ejdb/­blob/­master/­README.mddocs.cloudera.com/­documentation/­enterprise/­latest/­topics/­impala.htmlwww.sequoiadb.com/­en/­index.php?m=Files&a=index
DeveloperSoftmotionsClouderaSequoiadb Ltd.
Initial release201220132013
Current release3.4.0, April 2020
License infoCommercial or Open SourceOpen Source infoGPLv2Open Source infoApache Version 2Open Source infoServer: AGPL; Client: Apache V2
Cloud-based only infoOnly available as a cloud servicenonono
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageCC++C++
Server operating systemsserver-lessLinuxLinux
Data schemeschema-freeyesschema-free
Typing infopredefined data types such as float or dateyes infostring, integer, double, bool, date, object_idyesyes infooid, date, timestamp, binary, regex
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.nono
Secondary indexesnoyesyes
SQL infoSupport of SQLnoSQL-like DML and DDL statementsSQL-like query language
APIs and other access methodsin-process shared libraryJDBC
ODBC
proprietary protocol using JSON
Supported programming languagesActionscript
C
C#
C++
Go
Java
JavaScript (Node.js)
Lua
Objective-C
Pike
Python
Ruby
All languages supporting JDBC/ODBC.Net
C++
Java
PHP
Python
Server-side scripts infoStored proceduresnoyes infouser defined functions and integration of map-reduceJavaScript
Triggersnonono
Partitioning methods infoMethods for storing different data on different nodesnoneShardingSharding
Replication methods infoMethods for redundantly storing data on multiple nodesnoneselectable replication factorSource-replica replication
MapReduce infoOffers an API for user-defined Map/Reduce methodsnoyes infoquery execution via MapReduceno
Consistency concepts infoMethods to ensure consistency in a distributed systemEventual ConsistencyEventual Consistency
Foreign keys infoReferential integrityno infotypically not needed, however similar functionality with collection joins possiblenono
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of datanonoDocument is locked during a transaction
Concurrency infoSupport for concurrent manipulation of datayes infoRead/Write Lockingyesyes
Durability infoSupport for making data persistentyesyesyes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.nono
User concepts infoAccess controlnoAccess rights for users, groups and roles infobased on Apache Sentry and Kerberossimple password-based access control

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More resources
EJDBImpalaSequoiadb
Recent citations in the news

Cloudera’s Impala brings Hadoop to SQL and BI
25 October 2012, ZDNet

Man Busts Out of Google, Rebuilds Top-Secret Query Machine
24 October 2012, Wired

Cloudera aims to bring real-time queries to Hadoop, big data
24 October 2012, ZDNet

Unravel Data Adds Native Support for Impala and Kafka
29 June 2017, insideBIGDATA

Cloudera's Kudu: Like HDFS and HBase in one
28 September 2015, InfoWorld

provided by Google News

Understanding open source databases
18 February 2021, VentureBeat

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