[jira] [Commented] (NIFI-6964) Use compression level for xz-lzma2 format of the CompressContent processor

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

    [ https://issues.apache.org/jira/browse/NIFI-6964?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17012393#comment-17012393 ] 

John Pierce commented on NIFI-6964:
-----------------------------------

Ok - I spent some time this evening finally figuring out how to create a pull request. My change is now submitted via this preferred technique.

> Use compression level for xz-lzma2 format of the CompressContent processor
> --------------------------------------------------------------------------
>
>                 Key: NIFI-6964
>                 URL: https://issues.apache.org/jira/browse/NIFI-6964
>             Project: Apache NiFi
>          Issue Type: Improvement
>          Components: Core Framework
>    Affects Versions: 1.10.0
>            Reporter: John Pierce
>            Priority: Minor
>              Labels: xz-lzma2
>   Original Estimate: 4h
>          Time Spent: 10m
>  Remaining Estimate: 3h 50m
>
> The CompressContent processor does not use the Compression Level property of the processor except for when using the GZIP compression format. On the contrary, the xz-lzma2 compression format defaults to using XZ compression level 6 for that specific format (I read the CompressContent.java source code to verify this) – disregarding whatever compression level you set on the processor itself.
> I have a use case where I must use the xz-lzma2 format (don't ask why) and I have to send (using the XZ format) already highly-compressed content that is +*NOT*+ XZ format to begin with. I have in excess of 500 GB of this sort of already highly compressed content to further compress into the XZ format on a daily basis.
> The attached patch will enhance the CompressContent.java source code enabling the compression level property to be used in both the GZIP and the XZ-LZMA2 formats.
> Please consider adding this patch to the baseline for this processor. I've tested it and the results are fantastic because I can crank down the compression level to 0 for XZ-LZMA2 now and use a lot less CPU. I'm generally seeing a 66% improvement in elapsed time to process highly compressed content using XZ format with compression level of 0 versus the hard-coded level 6 of the baseline code.
>  



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