![]() To migrate a post-fork version of Elasticsearch (7.11+) to OpenSearch, you can use Logstash. Cluster restart upgrades are faster to perform and require fewer intermediate upgrades, but require downtime. Performing these upgrades might require intermediate upgrades to arrive at your desired version and can affect cluster performance as nodes leave and rejoin, but the cluster remains available throughout the process.Ĭluster restart upgrades require you to shut down all nodes, perform the upgrade, and restart the cluster.Ĭluster restart upgrades work between minor versions (for example, 6.5 to 6.8) and the next major version (for example, 6.x to 7.10.2). Rolling upgrades work between minor versions (for example, 6.5 to 6.8) and also support a single path to the next major version (for example, 6.8 to 7.10.2). Rolling upgrades let you shut down one node at a time for minimal disruption of service. Elasticsearch OSS supports two types of upgrades: rolling and cluster restart. If your existing cluster runs an older version of Elasticsearch OSS, the first step is to upgrade to version 6.x or 7.x. If you want to migrate from an existing Elasticsearch OSS cluster to OpenSearch and find the snapshot approach unappealing, you can migrate your existing nodes from Elasticsearch OSS to OpenSearch. ![]() Migrating from Elasticsearch OSS to OpenSearch
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