# Cold data

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{{Short description|Computer data that is rarely accessed}}
In [computer storage](/source/computer_storage), '''cold data''' refers to data that is rarely accessed, therefore considered "cold".

Cold data is the opposite of hot data, which is data that is frequently accessed.<ref>{{cite book |last1=Cai |first1=Zhipeng |last2=Wang |first2=Chaokun |last3=Cheng |first3=Siyao |last4=Wang |first4=Hongzhi |last5=Gao |first5=Hong |title=Wireless Algorithms, Systems, and Applications: 9th International Conference, WASA 2014, Harbin, China, June 23-25, 2014, Proceedings |date=18 June 2014 |publisher=Springer |isbn=978-3-319-07782-6 |url=https://books.google.com/books?id=mdQlBAAAQBAJ&dq=%22cold+data%22+%22hot+data%22&pg=PA14 |language=en}}</ref>

==Uses==
To optimize storage costs, cold data can be stored on lower performing and less expensive storage media.<ref>{{cite book |last1=Abbasi |first1=Asif |title=AWS Certified Data Analytics Study Guide: Specialty (DAS-C01) Exam |date=20 November 2020 |publisher=John Wiley & Sons |isbn=978-1-119-64944-1 |url=https://books.google.com/books?id=yKcKEAAAQBAJ&dq=%22cold+data%22+%22hot+data%22&pg=PA12 |language=en}}</ref> For example, [solid state disks](/source/solid_state_disks) may be used for storing hot data, while cold data can be moved to [hard drives](/source/hard_drives), [optical disc](/source/optical_disc)s, [tapes](/source/Linear_Tape-Open), or migrated to [cloud storage](/source/cloud_storage).<ref>[https://www.techopedia.com/definition/32623/cold-data Cold Data], Techopedia</ref><ref>[https://www.enterprisestorageforum.com/management/cold-cloud-data-storage/ Cold Cloud Data Storage], Enterprise Storage Forum</ref>

==See also==
* {{annotated link|Cache (computing)}}
* {{annotated link|Hierarchical storage management}}
* {{annotated link|Sneakernet}}

==References==
{{reflist}}

Category:Data storage
Category:Computer data storage
Category:Backup

{{compu-storage-stub}}

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Adapted from the Wikipedia article [Cold data](https://en.wikipedia.org/wiki/Cold_data) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Cold_data?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.