[jira] [Commented] (IOTDB-3668) Tiered Storage

["Haiming Zhu (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/IOTDB-3668?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17559167#comment-17559167 ] 

Haiming Zhu commented on IOTDB-3668:
------------------------------------

The related PR is https://github.com/apache/iotdb/pull/3138

> Tiered Storage
> --------------
>
>                 Key: IOTDB-3668
>                 URL: https://issues.apache.org/jira/browse/IOTDB-3668
>             Project: Apache IoTDB
>          Issue Type: Task
>          Components: Core/Engine
>            Reporter: Haiming Zhu
>            Priority: Major
>
> With the rapid development of the Internet of Things, the volume of real-time monitoring data generated by devices has increased rapidly. Besides, in order to support industrial Internet applications, enterprises have gradually increased their requirements for storing full historical data, which increases storage costs.
>  
> However, the time series data application load has the characteristic of ’newly written data has a higher probability of being queried, historical data has a lower probability of being queried, and a little higher query delay is acceptable’. To this end, a feasible way to reduce storage costs is to use tiered physical storage media: group the storage medium by performance, price, and capacity to form a hierarchy. Hot data is stored on the high-performance storage medium layer and cold data is stored on the low-performance storage media layer. When the nature of data changes, the migration mechanism is used to migrate data to the appropriate storage layer. By optimizing the distribution of data, databases can achieve the best read and write performance.



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