[jira] [Work started] (HADOOP-15563) Full S3Guard Support for on demand DDB tables

["Steve Loughran (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-15563?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on HADOOP-15563 started by Steve Loughran.
-----------------------------------------------
> Full S3Guard Support for on demand DDB tables
> ---------------------------------------------
>
>                 Key: HADOOP-15563
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15563
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>    Affects Versions: 3.1.0
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>            Priority: Major
>
> To keep costs down on DDB, autoscaling is a key feature: you set the max values and when idle, you don't get billed, *at the cost of delayed scale time and risk of not getting the max value when AWS is busy*
> It can be done from the AWS web UI, but not in the s3guard init and set-capacity calls
> It can be done [through the API|https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/AutoScaling.HowTo.SDK.html]
> Usual issues then: wiring up, CLI params, testing. It'll be hard to test.
> Fully support On-demand DDB tables in S3Guard
> * create (0, 0) will create an on-demand table.
> * set capacity (0, 0) will create an on-demand table.
> * once a table is on demand, any set capacity command other than to (0, 0) will then fail.
> * when loading table, note if it is on-demand or not
> * if on demand, prune() doesn't bother to throttle requests any more by sleeping.



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