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https://issues.apache.org/jira/browse/SOLR-6806?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15882832#comment-15882832
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Shawn Heisey commented on SOLR-6806:
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bq. I think the whole solrj-client folder is full of duplicate libraries.

Yes, dist/solrj-lib is comprised of  duplicates, taking 6MB of space.  It would 
be one of the things copied by the makedist script I mentioned.

I still think that the main DIH code and jar should be moved into core.  The 
extras probably should remain outside, especially because the dependencies are 
not trivial in size.

I do find it confusing that the contrib jars are in dist, but their 
dependencies are in contrib.  Seems like they should be together in contrib.

> Reduce the size of the main Solr binary download
> ------------------------------------------------
>
>                 Key: SOLR-6806
>                 URL: https://issues.apache.org/jira/browse/SOLR-6806
>             Project: Solr
>          Issue Type: Task
>          Components: Build
>    Affects Versions: 5.0
>            Reporter: Shawn Heisey
>         Attachments: solr-zip-docs-extracted.png, solr-zip-extract-graph.png
>
>
> There has been a lot of recent discussion about how large the Solr download 
> is, and how to reduce its size.  The last release (4.10.2) weighs in at 143MB 
> for the tar and 149MB for the zip.
> Most users do not need the full download.  They may never need contrib 
> features, or they may only need one or two, with DIH being the most likely 
> choice.  They could likely get by with a download that's less than 40 MB.
> Our primary competition has a 29MB zip download for the release that's 
> current right now, and not too long ago, that was about 20MB.  I didn't look 
> very deep, but any additional features that might be available for download 
> were not immediately apparent on their website.  I'm sure they exist, but I 
> would guess that most users never need those features, so most users never 
> even see them.
> Solr, by contrast, has everything included ... a "kitchen sink" approach. 
> Once you get past the long download time and fire up the example, you're 
> presented with configs that include features you're likely to never use.
> Although this offers maximum flexibility, I think it also serves to cause 
> confusion in a new user.
> A much better option would be to create a core download that includes only a 
> minimum set of features, probably just the war, the example servlet 
> container, and an example config that only uses the functionality present in 
> the war.  We can create additional downloads that offer additional 
> functionality and configs ... DIH would be a very small addon that would 
> likely be downloaded frequently.
> SOLR-5103 describes a plugin infrastructure which would make it very easy to 
> offer a small core download and then let the user download additional 
> functionality using scripts or the UI.



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