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SOLR-3504: add note about hard num docs limit in Lucene to planning installation section

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Cassandra Targett 2017-11-09 14:10:40 -06:00
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solr/solr-ref-guide/src/installing-solr.adoc
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@ -45,9 +45,10 @@ When you're ready to setup Solr for a production environment, please refer to th
How to size your Solr installation is a complex question that relies on a number of factors, including the number and structure of documents, how many fields you intend to store, the number of users, etc.
It's highly recommended that you spend a bit of time thinking about the factors that will impact hardware sizing for your Solr implementation. A very good blog post that discusses the issues to consider is https://lucidworks.com/2012/07/23/sizing-hardware-in-the-abstract-why-we-dont-have-a-definitive-answer/[Sizing Hardware in the Abstract: Why We Don't have a Definitive Answer].
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One thing to note when planning your installation is that a hard limit exists in Lucene for the number of documents in a single index: approximately 2.14 billion documents (2,147,483,647 to be exact). In practice, it is highly unlikely that such a large number of documents would fit and perform well in a single index, and you will likely need to distribute your index across a cluster before you ever approach this number. If you know you will exceed this number of documents in total before you've even started indexing, it's best to plan your installation with <<solrcloud.adoc#solrcloud,SolrCloud>> as part of your design from the start.
== Package Installation
To keep things simple for now, extract the Solr distribution archive to your local home directory, for instance on Linux, do: