DBMS > LevelDB vs. MySQL vs. Sqrrl vs. Tkrzw
System Properties Comparison LevelDB vs. MySQL vs. Sqrrl vs. Tkrzw
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|Editorial information provided by DB-Engines|
|Name||LevelDB Xexclude from comparison||MySQL Xexclude from comparison||Sqrrl Xexclude from comparison||Tkrzw Successor of Tokyo Cabinet and Kyoto Cabinet Xexclude from comparison|
|Sqrrl has been acquired by Amazon and became a part of Amazon Web Services. It has been removed from the DB-Engines ranking.|
|Description||Embeddable fast key-value storage library that provides an ordered mapping from string keys to string values||Widely used open source RDBMS||Adaptable, secure NoSQL built on Apache Accumulo||A concept of libraries, allowing an application program to store and query key-value pairs in a file. Successor of Tokyo Cabinet and Kyoto Cabinet|
|Primary database model||Key-value store||Relational DBMS Key/Value like access via memcached API||Document store|
Wide column store
|Secondary database models||Document store|
|Developer||Oracle since 2010, originally MySQL AB, then Sun||Amazon originally Sqrrl Data, Inc.||Mikio Hirabayashi|
|Current release||1.23, February 2021||8.0.32, January 2023||0.9.3, August 2020|
|License Commercial or Open Source||Open Source BSD||Open Source GPL version 2. Commercial licenses with extended functionallity are available||commercial||Open Source Apache Version 2.0|
|Cloud-based only Only available as a cloud service||no||no||no||no|
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|Implementation language||C++||C and C++||Java||C++|
|Server operating systems||Illumos|
|Typing predefined data types such as float or date||no||yes||yes||no|
|XML support Some form of processing data in XML format, e.g. support for XML data structures, and/or support for XPath, XQuery or XSLT.||no||yes||no|
|SQL Support of SQL||no||yes with proprietary extensions||no||no|
|APIs and other access methods||ADO.NET|
Proprietary native API
RESTful HTTP API
|Supported programming languages||C++|
Java 3rd party binding
Python 3rd party binding
C using GLib
|Server-side scripts Stored procedures||no||yes proprietary syntax||no||no|
|Partitioning methods Methods for storing different data on different nodes||none||horizontal partitioning, sharding with MySQL Cluster or MySQL Fabric||Sharding making use of Hadoop||none|
|Replication methods Methods for redundantly storing data on multiple nodes||none||Multi-source replication|
|selectable replication factor making use of Hadoop||none|
|MapReduce Offers an API for user-defined Map/Reduce methods||no||no||yes||no|
|Consistency concepts Methods to ensure consistency in a distributed system||Immediate Consistency||Immediate Consistency||Immediate Consistency Document store kept consistent with combination of global timestamping, row-level transactions, and server-side consistency resolution.||Immediate Consistency|
|Foreign keys Referential integrity||no||yes not for MyISAM storage engine||no||no|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||no||ACID not for MyISAM storage engine||Atomic updates per row, document, or graph entity|
|Concurrency Support for concurrent manipulation of data||yes||yes table locks or row locks depending on storage engine||yes||yes|
|Durability Support for making data persistent||yes with automatic compression on writes||yes||yes||yes|
|In-memory capabilities Is there an option to define some or all structures to be held in-memory only.||yes||yes using specific database classes|
|User concepts Access control||no||Users with fine-grained authorization concept no user groups or roles||Cell-level Security, Data-Centric Security, Role-Based Access Control (RBAC), Attribute-Based Access Control (ABAC)||no|
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|LevelDB||MySQL||Sqrrl||Tkrzw Successor of Tokyo Cabinet and Kyoto Cabinet|
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