apache-ignite

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// Licensed to the Apache Software Foundation (ASF) under one or more
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// contributor license agreements.  See the NOTICE file distributed with
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// this work for additional information regarding copyright ownership.
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// The ASF licenses this file to You under the Apache License, Version 2.0
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// (the "License"); you may not use this file except in compliance with
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// the License.  You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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= Version Upgrade
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Upgrade is an important part of the lifecycle of any software system. This page covers the basic recommendations for upgrading the Apache Ignite version.
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== Upgrading Nodes
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Updating node version is as simple as replacing the Apache Ignite binaries with a new version. However, there are several things to keep in mind when performing the upgrade:
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- Ignite cluster cannot have nodes that run on different Ignite versions. You need to stop the cluster and start it again on the new Ignite version.
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- It is possible to accidentally overwrite your persistent storage or other important data during the upgrade. It is recommended to move this data outside of intallation folder if you are planning upgrades:
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* The work directory is used to store application data and all data required for the node to work. You can change its location as described in tge link:setup#configuring-work-directory[Configuring Work Directory] section.
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* The persistent storage holds all information stored on the node. You can change its location as described in the link:persistence/native-persistence#configuring-persistent-storage-directory[Configuring Persistent Storage Directory] section.
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* WAL Archive os used to store WAL segments for recovery. You can change its location as described in link:persistence/native-persistence#wal-archive[WAL Archive] section.