274cf7a93a
This commit: - Removes upgrade guides for versions older than 5.0. The oldest one is from version 4.6 to 5.0. - Adds the redirections for the removed pages. Closes scylladb/scylladb#15709
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=================
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Upgrade ScyllaDB
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=================
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.. toctree::
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:titlesonly:
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:hidden:
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ScyllaDB Versioning <scylladb-versioning>
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ScyllaDB Open Source Upgrade <upgrade-opensource/index>
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ScyllaDB Open Source to ScyllaDB Enterprise Upgrade <upgrade-to-enterprise/index>
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ScyllaDB Image <ami-upgrade>
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ScyllaDB Enterprise <https://enterprise.docs.scylladb.com/stable/upgrade/upgrade-enterprise/index.html>
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Overview
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---------
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ScyllaDB upgrade is a rolling procedure - it does not require a full cluster shutdown and is performed without any
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downtime or disruption of service.
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To ensure a successful upgrade, follow the :ref:`documented upgrade procedures <upgrade-upgrade-procedures>` tested by ScyllaDB. This means that:
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* You should perform the upgrades consecutively - to each successive X.Y version, **without skipping any major or minor version**.
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* Before you upgrade to the next version, the whole cluster (each node) must be upgraded to the previous version.
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* You cannot perform an upgrade by replacing the nodes in the cluster with new nodes with a different ScyllaDB version. You should never add a new node with a different version to a cluster - if you :doc:`add a node </operating-scylla/procedures/cluster-management/add-node-to-cluster>`, it must have the same X.Y.Z (major.minor.patch) version as the other nodes in the cluster.
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Example
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========
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The following example shows the upgrade path for a 3-node cluster from version 4.3 to version 4.6:
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#. Upgrade all three nodes to version 4.4.
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#. Upgrade all three nodes to version 4.5.
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#. Upgrade all three nodes to version 4.6.
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Upgrading to each patch version by following the Maintenance Release Upgrade Guide
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is optional. However, we recommend upgrading to the latest patch release for your version before upgrading to a new version.
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For example, upgrade to patch 4.4.8 before upgrading to version 4.5.
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.. _upgrade-upgrade-procedures:
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Procedures for Upgrading ScyllaDB
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-----------------------------------
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* :doc:`Upgrade ScyllaDB Open Source <upgrade-opensource/index>`
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* :doc:`Upgrade from ScyllaDB Open Source to Scylla Enterprise <upgrade-to-enterprise/index>`
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* :doc:`Upgrade ScyllaDB Image <ami-upgrade>`
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* `Upgrade ScyllaDB Enterprise <https://enterprise.docs.scylladb.com/stable/upgrade/upgrade-enterprise/index.html>`_
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