Where / How ElasticSearch stores logs received from Logstash?
<p><em>Disclaimer: I am <strong>very new</strong> to ELK Stack, so this question can be very basic.</em></p>

<p>I am setting up ELK stack now. I have below <strong>basic</strong> questions about <strong>ElasticSearch</strong>.</p>

<ol>
<li>What is the <strong>storage model</strong> elastic search is following? </li>
</ol>

<p><em>For example Oracle is using relational model ,Alfresco is using "document model" and Apache Jackrabbit is using "hierarchial model"</em></p>

<p>2.Log data stored in elastic search is <strong>persistent/permanent</strong> ? Or ElasticSearch <strong>deletes</strong> log data after certain period?</p>

<p>3.How we will <strong>manage/backup</strong> this data?</p>

<p>4.Log/data files in Elastic Search is <strong>human-readable</strong>? </p>

<p>Any help/route to documentation will be appreciated.</p>