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=== System Requirements
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These are the requirements to run the {{book.project.name}} authentication server:
* Can run on any operating system that runs Java
* Java 8 JDK
* zip or gzip and tar
* At least 512M of RAM
* At least 1G of diskspace
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* A shared external database like Postgres, MySql, Oracle, etc. {{book.project.name}} requires an external shared
database if you want to run in a cluster. Please see the <<fake/../../database.adoc#_database,database configuration>> section of this guide for more information.
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* Network multicast support on your machine if you want to run in a cluster. {{book.project.name}} can
be clustered without multicast, but this requires a bunch of configuration changes. Please see
the <<fake/../../clustering.adoc#_clustering,clustering>> section of this guide for more information.
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* On Linux, it is recommended to use `/dev/urandom` as a source of random data to prevent {{book.project.name}} hanging due to lack of available
entropy, unless `/dev/random` usage is mandated by your security policy. To achieve that on Oracle JDK 8 and OpenJDK 8, set the `java.security.egd`
system property on startup to `file:/dev/urandom`.
