Computer system and its management method

A computer system comprising a plurality of storage apparatuses having one or more storage devices, and a host computer for sending or receiving information to or from each storage apparatus via networks, wherein two storage apparatuses among the plurality of storage apparatuses are migration source storage apparatuses and another storage apparatus is a migration destination storage apparatus, and data of a plurality of migration source volumes of each migration source storage apparatus is migrated via the networks to a plurality of migration destination volumes of the migration destination storage apparatus,

• wherein on condition that a migration setting is set to migrate the data of each migration source volume to each migration destination volume, the host computer switches from a plurality of network paths connecting each migration source volume and the host computer to a plurality of network paths connecting each migration destination volume and the host computer, and recognizes each migration destination volume as each migration source volume;
• wherein the migration destination storage apparatus has a controller for sending or receiving information to or from the host computer and managing each migration destination volume as an access target of the host computer;
• and
• wherein the controller manages each migration destination volume by associating it with each migration source storage apparatus and dividing the migration destination volumes into a plurality of resource groups based on identification information for identifying each migration source volume;
• manages a plurality of resources related to each migration destination volume by associating them with each resource group;
• and manages each migration destination volume and each resource belonging to each resource group as operation targets to be allocated individually to each migration source user who uses each migration source apparatus, and as operation targets over which only each migration source user has operation authority;
• and if a shared resource that is shared by each migration source storage apparatus exists in the plurality of resources related to each migration destination volume, the controller manages the shared resource as a resource group different from the plurality of resource groups by associating the shared resource with each resource group;
• creates a shared resource group for sorting the shared resource into each resource group;
• manages the shared resource by using the shared resource group;
• and manages the shared resource group as an operation target to be allocated individually to each migration source user.

A method for managing a computer system including a plurality of storage apparatuses having one or more storage devices, and a host computer for sending or receiving information to or from each storage apparatus via networks, wherein two storage apparatuses among the plurality of storage apparatuses are migration source storage apparatuses and another storage apparatus is a migration destination storage apparatus, and data of a plurality of migration source volumes of each migration source storage apparatus is migrated via the networks to a plurality of migration destination volumes of the migration destination storage apparatus, wherein the computer system management method comprising:

• a step executed by the host computer of, on condition that a migration setting is set to migrate the data of each migration source volume to each migration destination volume, switching from a plurality of network paths connecting each migration source volume and the host computer to a plurality of network paths connecting each migration destination volume and the host computer, and recognizing each migration destination volume as each migration source volume;
• a step executed by a controller, which manages, at the migration destination storage apparatus, each migration destination volume as an access target of the host computer, of managing each migration destination volume by associating it with each migration source storage apparatus and dividing the migration destination volumes into a plurality of resource groups based on identification information for identifying each migration source volume;
• a step executed by the controller of managing a plurality of resources related to each migration destination volume by associating them with each resource group;
• and
• a step executed by the controller of managing each migration destination volume and each resource belonging to each resource group as operation targets to be allocated individually to each migration source user who uses each migration source apparatus, and as operation targets over which only each migration source user has operation authority.