[[setup-upgrade]] == Upgrading [IMPORTANT] =========================================== Before upgrading Elasticsearch: * Consult the <> docs. * Test upgrades in a dev environment before upgrading your production cluster. * Always back up your data before upgrading. You cannot roll back to an earlier version unless you have a <> of your data. =========================================== Elasticsearch can usually be upgraded using a rolling upgrade process, resulting in no interruption of service. This section details how to perform both rolling upgrades and upgrades with full cluster restarts. To determine whether a rolling upgrade is supported for your release, please consult this table: [cols="1> |< 0.90.7 |0.90.x |<> |>= 0.90.7 |0.90.x |<> |1.0.0 - 1.3.1 |1.x |<> (if <> set to `false`) |>= 1.3.2 |1.x |<> |1.x |2.x |<> |======================================================================= include::backup.asciidoc[] include::rolling_upgrade.asciidoc[] include::cluster_restart.asciidoc[]