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DBMS > LevelDB vs. XTDB

System Properties Comparison LevelDB vs. XTDB

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Editorial information provided by DB-Engines
NameLevelDB  Xexclude from comparisonXTDB infoformerly named Crux  Xexclude from comparison
DescriptionEmbeddable fast key-value storage library that provides an ordered mapping from string keys to string valuesA general purpose database with bitemporal SQL and Datalog and graph queries
Primary database modelKey-value storeDocument store
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score3.06
Rank#101  Overall
#18  Key-value stores
Score0.00
Rank#354  Overall
#50  Document stores
Websitegithub.com/­google/­leveldbgithub.com/­xtdb/­xtdb
xtdb.com
Technical documentationgithub.com/­google/­leveldb/­blob/­master/­doc/­index.mdxtdb.com/­docs
DeveloperGoogleJuxt Ltd.
Initial release20112019
Current release1.23, February 20211.19, September 2021
License infoCommercial or Open SourceOpen Source infoBSDOpen Source infoMIT License
Cloud-based only infoOnly available as a cloud servicenono
DBaaS offerings (sponsored links) infoDatabase as a Service

Providers of DBaaS offerings, please contact us to be listed.
Implementation languageC++Clojure
Server operating systemsIllumos
Linux
OS X
Windows
All OS with a Java 8 (and higher) VM
Linux
Data schemeschema-freeschema-free
Typing infopredefined data types such as float or datenoyes, extensible-data-notation format
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 indexesnoyes
SQL infoSupport of SQLnolimited SQL, making use of Apache Calcite
APIs and other access methodsHTTP REST
JDBC
Supported programming languagesC++
Go
Java info3rd party binding
JavaScript (Node.js) info3rd party binding
Python info3rd party binding
Clojure
Java
Server-side scripts infoStored proceduresnono
Triggersnono
Partitioning methods infoMethods for storing different data on different nodesnonenone
Replication methods infoMethods for redundantly storing data on multiple nodesnoneyes, each node contains all data
MapReduce infoOffers an API for user-defined Map/Reduce methodsnono
Consistency concepts infoMethods to ensure consistency in a distributed systemImmediate Consistency
Foreign keys infoReferential integritynono
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of datanoACID
Concurrency infoSupport for concurrent manipulation of datayesyes
Durability infoSupport for making data persistentyes infowith automatic compression on writesyes, flexibel persistency by using storage technologies like Apache Kafka, RocksDB or LMDB
User concepts infoAccess controlno

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More resources
LevelDBXTDB infoformerly named Crux
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