Computer system and data management method

A computer system, comprising a storage system including N nodes (N is an integer, equal to or larger than 2) coupled to one or more data processing system,

• the storage system being configured to provide a plurality of tenant spaces that are a plurality of storage spaces based on the N nodes and store a plurality of data units of a plurality of tenants,
• the plurality of tenant spaces containing Y1 tenant spaces (Y1 is an integer, equal to or larger than 2 and equal to or smaller than N) for a first tenant, the Y1 tenant spaces based on Y1 node groups among the N nodes, and each of the Y1 node groups containing Q1 or more nodes (Q1 is an integer, equal to or larger than 1), and
• the storage system being configured to
• for the first tenant, arranging Y1-time multiplexed data units in the Y1 tenant spaces, and
• from a first load-source tenant space from among the Y1 tenant spaces, loading a first data unit group which contains one or more data units to a first load-destination data processing system among the one or more data processing systems.