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Depending on specific Google Distributed Cloud (GDC) air-gapped releases, existing database clusters may not be migrated forward from previous GDC versions. In these cases, before applying the release, you must confirm that there is no critical data that must be preserved. For data that must be preserved, follow these steps to migrate them forward:
Before applying the release, you must confirm that there is no critical data that must be preserved. For data that must be preserved, follow these steps to migrate them forward:
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-25 UTC."],[],[],null,["# Preserve database clusters before an upgrade\n\nDepending on specific Google Distributed Cloud (GDC) air-gapped releases, existing database clusters may not be migrated forward from previous GDC versions. In these cases, before applying the release, you must confirm that there is no critical data that must be preserved. For data that must be preserved, follow these steps to migrate them forward:\n\nBefore applying the release, you must confirm that there is no critical data that must be preserved. For data that must be preserved, follow these steps to migrate them forward:\n\n1. [List database clusters](/distributed-cloud/hosted/docs/latest/gdch/application/ao-user/db-list-cluster) and identify the ones that must be preserved.\n2. For each database cluster, [export the data](/distributed-cloud/hosted/docs/latest/gdch/application/ao-user/db-export-cluster) and store it in a GDC bucket.\n3. Optional: To avoid additional changes, completely [delete the database cluster](/distributed-cloud/hosted/docs/latest/gdch/application/ao-user/db-delete-cluster) before applying the new GDC version.\n4. After the upgrade is complete, recreate the database cluster and [import the dump file](/distributed-cloud/hosted/docs/latest/gdch/application/ao-user/db-import-from-file) into it."]]
