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PAGE THOUGHTS

adding a current development section to cover the v3.0.0 uplift from OTP r16b02_basho10 to OTP 20 that is currently nearing completion (src: mailing lists). adding future plans section to cover uplifting to OTP22 (src: mailing lists). — Preceding unsigned comment added by PeterJAClark (talk • contribs) 00:50, 10 March 2020 (UTC)


Products

Riak Core - distributed computing platform Riak KV - key/value store, AAE, replication, PB and HTTP interfaces Riak CS - cloud storage (file chunking, S3 interface) Riak TS - time series storage

Riak KV features

Pluggable Backends - Bitcask - LevelDB - Leveled - Memory

Replication - One-way, bi-directional and more complicated replication supported - Full-sync and - Realtime-sync - Repl API

Interfaces - REST-ful API - Protocol Buffers - Apache Solr via Yokuzuna - MapReduce

Use cases - Stable - Resilient - Predicable

Licensing 2.2.3 and below - freemium model with Enterprise Edition requiring a license from Basho. 2.2.5 and above - open source

Release History - make table

Product, Version, Release Date, Changes Riak KV, 1.0.0, 2009-08-17 Riak CS, 1.0.0, somewhen Riak TS, 1.0.0, somewhen Riak KV, 2.2.3, ... Riak KV, 2.2.6, ... Riak KV, 2.9.0, ... Riak KV, 2.9.1, ... Riak KV, 2.9.2, ... Riak KV, 2.9.3, ... Riak KV, 3.0.0, ...


Page


Riak
Developer(s)Open Source
Initial releaseAugust 17, 2009; 15 years ago (2009-08-17)
Stable release
2.9.2 / April 9, 2020; 4 years ago (2020-04-09)[1]
Preview release
2.9.3 / 29 June 2020; 4 years ago (2020-06-29)
Written inErlang
Operating systemLinux, BSD, macOS, Solaris
PlatformIA-32, x86-64, ARM
TypeNoSQL database, cloud storage
LicenseApache License 2.0
Websiteriak.com

Riak (pronounced "ree-ack" [2]) is a distributed NoSQL key-value data store that offers high availability, fault tolerance, operational simplicity, and scalability.[3] Riak is now entirely open-source after the code was released under the Apache 2 license by the new IP owner in 2018 following the collapse of Basho, the creators of Riak, in 2017. In addition to the version, it comes in a supported enterprise version and a cloud storage version.[3] Riak implements the principles from Amazon's Dynamo paper[4] with heavy influence from the CAP Theorem. Written in Erlang, Riak has fault tolerant data replication and automatic data distribution across the cluster for performance and resilience.[5]

Riak is licensed using a freemium model: open source versions of Riak and Riak CS are available, but end users can pay for additional features and support.[5]

Riak has a pluggable backend for its core storage, with the default storage backend being Bitcask.[6] LevelDB is also supported.

Main features

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Fault-tolerant availability
Riak replicates key/value stores across a cluster of nodes with a default n_val of three. In the case of node outages due to network partition or hardware failures, data can still be written to a neighboring node beyond the initial three, and read-back due to its "masterless" peer-to-peer architecture.
Queries
Riak provides a REST-ful API through HTTP and Protocol Buffers for basic PUT, GET, POST, and DELETE functions. More complex queries are also possible, including secondary indexes, search (via Apache Solr), and MapReduce. MapReduce has native support for both JavaScript (using the SpiderMonkey runtime) and Erlang.
Predictable latency
Riak distributes data across nodes with hashing and can provide latency profile, even in the case of multiple node failures.
Storage options
Keys/values can be stored in memory, disk, or both.
Multi-datacenter replication
In multi-datacenter replication, one cluster acts as a "primary cluster." The primary cluster handles replication requests from one or more "secondary clusters" (generally located in other regions or countries). If the datacenter with the primary cluster goes down, a second cluster can take over as the primary cluster.
There are two primary modes of operation: fullsync and realtime. In fullsync mode, a complete synchronization occurs between primary and secondary cluster(s), by default every six hours. In real-time mode, replication to the secondary data center(s) is triggered by updates to the primary data center. All multi-datacenter replication occurs over multiple concurrent TCP connections to maximize performance and network utilization.
Tunable consistency
Option to choose between eventual and strong consistency for each bucket.

Licensing and support

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Riak is available for free under the Apache 2 License. In addition, Basho Technologies offered two options for its commercial software, Riak Enterprise and Riak Enterprise Plus. Riak Enterprise Plus adds baseline and annual system health checks to ensure long-term platform stability and performance.

Language support

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Riak has official drivers for Ruby, Java, Erlang and Python. There are also numerous community-supported drivers for other programming languages.[7]

History

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Riak was originally written by Andy Gross and others at Basho Technologies [2] to power a web Sales Force Automation application by former engineers and executives from Akamai. There was more interest in the datastore technology than the applications built on it, so the company decided to build a business around Riak itself, gaining adoption throughout the Fortune 100 and becoming a foundation to many of the world's fastest-growing Web-based, mobile and social networking applications, as well as cloud service providers. Releases after graduation include

  • 1.1, released Feb 21 2012, added Riaknostic, enhanced error logging and reporting, improved resiliency for large clusters, and a new graphical operations and monitoring interface called Riak Control.
  • 1.4, released July 10, 2013, added counters, secondary indexing improvements, reduced object storage overhead, handoff progress reporting, and enhancements to MDC replication.
  • 2.0, released September 2, 2014, added new data types including sets, maps, registers, and flags simplifying application development. Strong consistency by bucket, full-text integration with Apache Solr, Security, and reduced replicas for Secondary sites.
  • 2.1, released April 16, 2015, added an optimization for many write-heavy workloads – “write once” buckets – buckets whose entries are intended to be written exactly once, and never updated or over-written.
  • 2.2, released November 17, 2016, added Support for Debian 8 and Ubuntu 16.04, Solr integration improvements.[8]
  • 2.2.3, released April 03, 2017 - Last version of Riak produced by Basho
  • Basho may no longer be maintained by Basho [9]
  • 2.2.6, released April 25, 2018, is the first community release. 2.2.5 had a packaging issue, so 2.2.6 was released to resolve that within a few days. Added support for Multi-Datacentre Replication which was not part of open-source Riak before, added a grow-only set data type, improved data distribution over nodes and cleaned up production test issues.[10]
  • 2.9.0, released May 17, 2019, brings several new features such as TictacAAE, a new backend called Leveled, Vnode soft limits, core node worker pool, and a repl API.[11]
  • 2.9.0p5, released November 25, 2019, is the current patch of 2.9.0 and resolves several bugs.[12]
  • 2.9.1, released February 18, 2020, brings a new real-time and full-sync engine called nextgenrepl, mass deletions of expired objects, improved bucket listing, and assorted fixes.[13]
  • 2.9.2, released April 09, 2020, added 32-bit support (to allow for use on ARM architecture) and several speed and stability improvements.[14]
  • 2.9.3, released June 29, 2020 (??), resolved a few bugs.[15]

Users

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Notable users include AT&T, Comcast,[16] GitHub,[16] Best Buy,[16] UK National Health Services (NHS),[17] The Weather Channel,[18] and Riot Games.[19]

See also

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References

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  1. ^ "Riak KV 2.9.2". http://www.riak.info/. Riak Community. 2020-04-09. Retrieved 2020-06-26. {{cite web}}: External link in |website= (help)
  2. ^ a b Sheehy, Justin. "Riak 1.0 Release Party". Vimeo.
  3. ^ a b Harvey, Cynthia (23 May 2014). "60 Open Source Apps You Can Use in the Cloud". Datamation. Retrieved 5 June 2014.
  4. ^ DeCandia, Giuseppe; Hastorun, Deniz; Jampani, Madan; Kakulapati, Gunavardhan; Lakshman, Avinash; Pilchin, Alex; Sivasubramanian, Swaminathan; Vosshall, Peter; Vogels, Werner (October 14–17, 2007). Dynamo: Amazon’s Highly Available Key-value Store (PDF). Proceedings of 21st ACM SIGOPS Symposium on Operating Systems Principles (SOSP '07). Stevenson, Washington, USA: ACM. pp. 205–220. doi:10.1145/1294261.1294281. ISBN 978-1-59593-591-5. Retrieved 5 June 2014. {{cite conference}}: External link in |conferenceurl= (help); Unknown parameter |conferenceurl= ignored (|conference-url= suggested) (help)
  5. ^ a b Morgan, Timothy Prickett (7 May 2014). "Eucalyptus Scales Out AWS Cloud Clone". Enterprise Tech. Retrieved 5 June 2014.
  6. ^ "Basho: Bitcask". Retrieved 5 June 2014.
  7. ^ "Riak Client Libraries and Community Code". Retrieved 5 June 2014.
  8. ^ "Riak KV 2.2.0 Release Notes". Basho. 2016-11-17. Retrieved 2016-12-21.
  9. ^ "TheRegister investigation". TheRegister.
  10. ^ "Riak KV 2.2.6 Release Notes". Retrieved 26 June 2020.
  11. ^ "Riak 2.9.0 Release Notes". Retrieved 26 June 2020.
  12. ^ "Riak 2.9.0p5 Release Notes". Retrieved 26 June 2020.
  13. ^ "Riak 2.9.1 Release Notes". Retrieved 26 June 2020.
  14. ^ "Riak 2.9.2 Release Notes". Retrieved 26 June 2020.
  15. ^ "Riak 2.9.3 Release Notes". Retrieved 26 June 2020.
  16. ^ a b c "Basho Technologies takes aim at more enterprises with upgrades". 21 February 2013. Retrieved 26 March 2015.
  17. ^ Clark, Jack (10 October 2013). "NHS tears out its Oracle Spine in favour of open source". The Register. Retrieved 5 June 2014.
  18. ^ Henschen, Doug (2 June 2014). "Why Big Data Tools Are Here To Stay: InformationWeek Video". InformationWeek. Retrieved 5 June 2014.
  19. ^ Ptaszek, Michal (16 January 2016). "Chat Service Architecture: Persistence". RiotGames. Retrieved 2 February 2016.
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Category:Cloud applications Category:Cloud infrastructure Category:Key-value databases Category:NoSQL Category:Cloud storage Category:Free software programmed in Erlang Category:Software using the Apache license

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