DBMS > etcd vs. RRDtool

System Properties Comparison etcd vs. RRDtool

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Editorial information provided by DB-Engines
Name	etcd  Xexclude from comparison	RRDtool  Xexclude from comparison
Description	A distributed reliable key-value store	Industry standard data logging and graphing tool for time series data. RRD is an acronym for round-robin database. The data is stored in a circular buffer, thus the system storage footprint remains constant over time.
Primary database model	Key-value store	Time Series DBMS
DB-Engines Ranking measures the popularity of database management systems Trend Chart	Score 10.43 Rank #47   Overall #5   Key-value stores	Score 2.40 Rank #117   Overall #7   Time Series DBMS
Website	etcd.io github.com/­etcd-io/­etcd	oss.oetiker.ch/­rrdtool
Technical documentation	etcd.io/­docs github.com/­etcd-io/­etcd/­tree/­master/­Documentation	oss.oetiker.ch/­rrdtool/­doc
Developer		Tobias Oetiker
Initial release		1999
Current release	3.4, August 2019	1.7.2, May 2019
License Commercial or Open Source	Open Source Apache Version 2.0	Open Source GPL V2 and FLOSS
Cloud-based only Only available as a cloud service	no	no
DBaaS offerings (sponsored links) Database as a Service Providers of DBaaS offerings, please contact us to be listed.
Implementation language	Go	C Implementations in Java (e.g. RRD4J) and C# available
Server operating systems	FreeBSD Linux Windows experimental	HP-UX Linux
Data scheme	schema-free	yes
Typing predefined data types such as float or date	no	Numeric data only
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	no Exporting into and restoring from XML files possible
Secondary indexes	no	no
SQL Support of SQL	no	no
APIs and other access methods	gRPC JSON over HTTP	in-process shared library Pipes
Supported programming languages	.Net C C++ Clojure Erlang Go Haskell Java JavaScript (Node.js) Perl PHP Python R Ruby Rust Scala Tcl	C with librrd library C# with a different implementation of RRDTool Java with a different implementation of RRDTool JavaScript (Node.js) with a different implementation of RRDTool Lua Perl PHP with a wrapper library Python Ruby
Server-side scripts Stored procedures	no	no
Triggers	yes, watching key changes	no
Partitioning methods Methods for storing different data on different nodes		none
Replication methods Methods for redundantly storing data on multiple nodes	Using Raft consensus algorithm to ensure data replication with strong consistency among multiple replicas.	none
MapReduce Offers an API for user-defined Map/Reduce methods	no	no
Consistency concepts Methods to ensure consistency in a distributed system	Immediate Consistency	none
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 by using the rrdcached daemon
Durability Support for making data persistent	yes	yes
In-memory capabilities Is there an option to define some or all structures to be held in-memory only.	no	yes
User concepts Access control	no	no
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