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DBMS > Amazon CloudSearch vs. Apache Druid vs. Datomic vs. Firebase Realtime Database vs. RocksDB

System Properties Comparison Amazon CloudSearch vs. Apache Druid vs. Datomic vs. Firebase Realtime Database vs. RocksDB

Editorial information provided by DB-Engines
NameAmazon CloudSearch  Xexclude from comparisonApache Druid  Xexclude from comparisonDatomic  Xexclude from comparisonFirebase Realtime Database  Xexclude from comparisonRocksDB  Xexclude from comparison
DescriptionA hosted search engine service by Amazon with the data stored in Amazons cloudOpen-source analytics data store designed for sub-second OLAP queries on high dimensionality and high cardinality dataDatomic builds on immutable values, supports point-in-time queries and uses 3rd party systems for durabilityCloud-hosted realtime document store. iOS, Android, and JavaScript clients share one Realtime Database instance and automatically receive updates with the newest data.Embeddable persistent key-value store optimized for fast storage (flash and RAM)
Primary database modelSearch engineRelational DBMS
Time Series DBMS
Relational DBMSDocument storeKey-value store
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score1.86
Rank#133  Overall
#12  Search engines
Score2.85
Rank#96  Overall
#50  Relational DBMS
#6  Time Series DBMS
Score1.55
Rank#144  Overall
#67  Relational DBMS
Score13.60
Rank#39  Overall
#6  Document stores
Score2.84
Rank#97  Overall
#16  Key-value stores
Websiteaws.amazon.com/­cloudsearchdruid.apache.orgwww.datomic.comfirebase.google.com/­products/­realtime-databaserocksdb.org
Technical documentationdocs.aws.amazon.com/­cloudsearchdruid.apache.org/­docs/­latest/­designdocs.datomic.comfirebase.google.com/­docs/­databasegithub.com/­facebook/­rocksdb/­wiki
DeveloperAmazonApache Software Foundation and contributorsCognitectGoogle infoacquired by Google 2014Facebook, Inc.
Initial release20122012201220122013
Current release30.0.0, June 20241.0.7180, July 20249.4.0, June 2024
License infoCommercial or Open SourcecommercialOpen Source infoApache license v2commercial infolimited edition freecommercialOpen Source infoBSD
Cloud-based only infoOnly available as a cloud serviceyesnonoyesno
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageJavaJava, ClojureC++
Server operating systemshostedLinux
OS X
Unix
All OS with a Java VMhostedLinux
Data schemeyesyes infoschema-less columns are supportedyesschema-freeschema-free
Typing infopredefined data types such as float or dateyesyesyesyesno
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.nononono
Secondary indexesyes infoall search fields are automatically indexedyesyesyesno
SQL infoSupport of SQLnoSQL for queryingnonono
APIs and other access methodsHTTP APIJDBC
RESTful HTTP/JSON API
RESTful HTTP APIAndroid
iOS
JavaScript API
RESTful HTTP API
C++ API
Java API
Supported programming languagesClojure
JavaScript
PHP
Python
R
Ruby
Scala
Clojure
Java
Java
JavaScript
Objective-C
C
C++
Go
Java
Perl
Python
Ruby
Server-side scripts infoStored proceduresnonoyes infoTransaction Functionslimited functionality with using 'rules'no
TriggersnonoBy using transaction functionsCallbacks are triggered when data changes
Partitioning methods infoMethods for storing different data on different nodesyes infoautomatic partitioning across Amazon Search Instance as requiredSharding infomanual/auto, time-basednone infoBut extensive use of caching in the application peershorizontal partitioning
Replication methods infoMethods for redundantly storing data on multiple nodesyes infomanaged transparently by AWSyes, via HDFS, S3 or other storage enginesnone infoBut extensive use of caching in the application peersyes
MapReduce infoOffers an API for user-defined Map/Reduce methodsnonononono
Consistency concepts infoMethods to ensure consistency in a distributed systemImmediate ConsistencyImmediate ConsistencyEventual Consistency infoif the client is offline
Immediate Consistency infoif the client is online
Foreign keys infoReferential integritynonononono
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of datanonoACIDyesyes
Concurrency infoSupport for concurrent manipulation of datayesyesyesyesyes
Durability infoSupport for making data persistentyesyesyes infousing external storage systems (e.g. Cassandra, DynamoDB, PostgreSQL, Couchbase and others)yesyes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.noyes inforecommended only for testing and developmentyes
User concepts infoAccess controlauthentication via encrypted signaturesRBAC using LDAP or Druid internals for users and groups for read/write by datasource and systemnoyes, based on authentication and database rulesno

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More resources
Amazon CloudSearchApache DruidDatomicFirebase Realtime DatabaseRocksDB
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