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System and method for continuous destaging of changed data from a shared cache in a multisystem shared disk environment wherein castout interest is established in a hierarchical fashion
System and method for continuous destaging of changed data from a shared cache in a multisystem shared disk environment wherein castout interest is established in a hierarchical fashion
A system and method for destaging changed data from a shared cache castout in a shared data environment distributes castout ownership for a dataset among a plurality of systems having an update interest in the dataset. One system is designated as having castout ownership of the dataset in a primary state. All other systems having an update interest in the dataset hold castout ownership for the dataset in a backup state. When the primary owner relinquishes ownership, primary ownership is passed to one of the backup systems. A structure castout owner for the entire cache assumes the responsibility of castout of changed data for a dataset for which the primary castout owner has had a failure.
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