METRON-2313 - Added additional documentation on SOLR performance, cha…

[tigerquoll]

…nged defaults.

Contributor Comments

Added a description of SOLR performance options and trade-offs. Changed the default Metron SOLR schemas to be more performant default.

Pull Request Checklist

Thank you for submitting a contribution to Apache Metron.
Please refer to our Development Guidelines for the complete guide to follow for contributions.
Please refer also to our Build Verification Guidelines for complete smoke testing guides.

In order to streamline the review of the contribution we ask you follow these guidelines and ask you to double check the following:

For all changes:

• Is there a JIRA ticket associated with this PR? If not one needs to be created at Metron Jira.
• Does your PR title start with METRON-XXXX where XXXX is the JIRA number you are trying to resolve? Pay particular attention to the hyphen "-" character.
• Has your PR been rebased against the latest commit within the target branch (typically master)?

For documentation related changes:

• Have you ensured that format looks appropriate for the output in which it is rendered by building and verifying the site-book? If not then run the following commands and the verify changes via site-book/target/site/index.html:

  cd site-book
  mvn site
  

Note:

Please ensure that once the PR is submitted, you check travis-ci for build issues and submit an update to your PR as soon as possible.
It is also recommended that travis-ci is set up for your personal repository such that your branches are built there before submitting a pull request.

[ottobackwards]

Thanks for updating the documentation. This looks good. I'm assuming that the SOLR stuff is correct technically.

Just a couple of comments.

[ottobackwards]

Maybe we can explicitly state that these instructions are known to work and tried with version 7.x? of SOLR.

Since we can't keep up with the latest?

[ottobackwards]

Or at the top of the document...

This documentations is current with SOLR version XXXXX ( Cloudera Search YYYYY )

[tigerquoll]

We probably can't keep up with the latest, but I've made sure this set of advice is good for all versions of SOLR distributions (Apache and commercial) that are in use with Metron.