[jira] [Commented] (HUDI-109) Ability to query older snapshots of data

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

    [ https://issues.apache.org/jira/browse/HUDI-109?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17155195#comment-17155195 ] 

wangmeng commented on HUDI-109:
-------------------------------

你好，Nicholas jiang，‘the implementation of query older snapshots of data use HoodieTimeline ’  我认为非常好，能够帮助我来解决我们公司遇到的问题。你可以分享一下你的 code 吗？

> Ability to query older snapshots of data 
> -----------------------------------------
>
>                 Key: HUDI-109
>                 URL: https://issues.apache.org/jira/browse/HUDI-109
>             Project: Apache Hudi
>          Issue Type: New Feature
>          Components: Spark Integration
>            Reporter: Nishith Agarwal
>            Assignee: Nishith Agarwal
>            Priority: Major
>
> At the moment, Hudi allows a client to configure the number of versions to keep for a particular dataset. Depending on the trade-off between storage cost vs number of versions required, one can use Hudi to keep multiple views of the dataset at different points in time. 
> Hudi uses this information to provide incremental consumption of what changed between 2 time units but does not have a simple way to be able to query a dataset as of a particular instant in time. There are multiple use-cases which benefit from such a feature, such as ML training/use-cases against the state of a feature store at a particular instant in time or for auditing system that require to see previous versions of data. 
> Hudi has most of the building blocks to be able to support such queries, we'd like to explore the feasibility & changes required to support it.
> [~semanticbeeng] something along the lines of what you brought up as well.



--
This message was sent by Atlassian Jira
(v8.3.4#803005)