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https://issues.apache.org/jira/browse/CARBONDATA-4110?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17301586#comment-17301586
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Akash R Nilugal commented on CARBONDATA-4110:
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Why is this PR needed?
Currently in the clean files operation the user does not know how much space 
will be freed. The idea is the add support for dry run in clean files which can 
tell the user how much space will be freed in the clean files operation without 
cleaning the actual data.

What changes were proposed in this PR?
This PR has the following changes:

Support dry run in clean files: It will show the user how much space will be 
freed by the clean files operation and how much space left (which can be 
released after expiration time) after the clean files operation.
Clean files output: Total size released during the clean files operation
Disable clean files Statistics option in case the user does not want clean 
files statistics
Clean files log: To enhance the clean files log to print the name of every file 
that is being deleted in the info log.

> Support clean files dry run and show statistics after clean files operation
> ---------------------------------------------------------------------------
>
>                 Key: CARBONDATA-4110
>                 URL: https://issues.apache.org/jira/browse/CARBONDATA-4110
>             Project: CarbonData
>          Issue Type: New Feature
>            Reporter: Vikram Ahuja
>            Priority: Minor
>          Time Spent: 26h 20m
>  Remaining Estimate: 0h
>




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