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1cab962098
Previously (and by default after commit) when master loose its last slot (due to migration, for example), its replicas will migrate to new last slot holder. There are cases where this is not desired: * Consolidation that results with removed nodes (including the replica, eventually). * Manually configured cluster topologies, which the admin wishes to preserve. Needlessly migrating a replica triggers a full synchronization and can have a negative impact, so we prefer to be able to avoid it where possible. This commit adds 'cluster-allow-replica-migration' configuration option that is enabled by default to preserve existed behavior. When disabled, replicas will not be auto-migrated. Fixes #4896 Co-authored-by: Oran Agra <oran@redislabs.com> |
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