DBMS > LevelDB vs. Memcached

System Properties Comparison LevelDB vs. Memcached

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Editorial information provided by DB-Engines
Name	LevelDB  Xexclude from comparison	Memcached  Xexclude from comparison
Description	Embeddable fast key-value storage library that provides an ordered mapping from string keys to string values	In-memory key-value store, originally intended for caching
Primary database model	Key-value store	Key-value store
DB-Engines Ranking measures the popularity of database management systems Trend Chart	Score 3.03 Rank #101   Overall #19   Key-value stores	Score 24.12 Rank #33   Overall #4   Key-value stores
Website	github.com/­google/­leveldb	www.memcached.org
Technical documentation	github.com/­google/­leveldb/­blob/­master/­doc/­index.md	github.com/­memcached/­memcached/­wiki
Developer	Google	Danga Interactive originally developed by Brad Fitzpatrick for LiveJournal
Initial release	2011	2003
Current release	1.23, February 2021	1.6.15, March 2022
License Commercial or Open Source	Open Source BSD	Open Source BSD license
Cloud-based only Only available as a cloud service	no	no
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Implementation language	C++	C
Server operating systems	Illumos Linux OS X Windows	FreeBSD Linux OS X Unix Windows
Data scheme	schema-free	schema-free
Typing predefined data types such as float or date	no	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
Secondary indexes	no	no
SQL Support of SQL	no	no
APIs and other access methods		Proprietary protocol
Supported programming languages	C++ Go Java 3rd party binding JavaScript (Node.js) 3rd party binding Python 3rd party binding	.Net C C++ ColdFusion Erlang Java Lisp Lua OCaml Perl PHP Python Ruby
Server-side scripts Stored procedures	no	no
Triggers	no	no
Partitioning methods Methods for storing different data on different nodes	none	none
Replication methods Methods for redundantly storing data on multiple nodes	none	none Repcached, a Memcached patch, provides this functionallity
MapReduce Offers an API for user-defined Map/Reduce methods	no	no
Consistency concepts Methods to ensure consistency in a distributed system	Immediate Consistency
Foreign keys Referential integrity	no	no
Transaction concepts Support to ensure data integrity after non-atomic manipulations of data	no	no
Concurrency Support for concurrent manipulation of data	yes	yes
Durability Support for making data persistent	yes with automatic compression on writes	no
User concepts Access control	no	yes using SASL (Simple Authentication and Security Layer) protocol
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