Data arrangement management method, data arrangement management system, data arrangement management device, and data arrangement management program

A storage system comprising:

• at least one client;
• a plurality of file servers connected to the client through a network, each of said file servers including a storage device, for providing a response to a request from the client;
• and
• control means for deriving an access context of data in one of said plurality of storage devices, accessed from the client, migrating to another one of said storage devices provided in the vicinity of the client, the data whose access context satisfies a migration condition defined in advance, and for performing rearrangement of the data.

A storage system comprising:

• at least one client;
• and
• a switch device logically, disposed between said client and at least one server which includes a storage device, said switch device providing said client with a file access virtually unifying a plurality of storage devices;
• said switch device obtaining log information on the file access from said client to one of said storage devices;
• and
• said storage system further comprising:
• means for determining data to be migrated from said one of said storage devices to another one of said storage devices, based on the log information and a predetermined rule for determining an object to be migrated.

A storage system, comprising a plurality of sites connected to one another through a network,

• each of said plurality of sites comprising:
• at least one client;
• a switch device logically disposed between the client and at least one server including a storage device, for providing to the client a file access virtually unifying a plurality of storage devices;
• and
• an analysis device connected to the switch device;
• the switch device receiving log information on the file access from the client;
• the analysis device comprising means for determining data to be migrated from the storage device of the server in another one of said sites different from one of said sites to which the client belongs to the server in said one of said sites to which the client belongs or in an other one of said sites in the vicinity of said one of said sites to which the client belongs and commanding the switch device to migrate the data, based on the file access log information;
• the switch device migrating the data from the storage device of the server in said another one of said sites to the storage device of said one of said sites to which the client belongs or said other one of said sites in the vicinity of said one of said sites to which the client belongs, based on the command from the analysis device.

A method for managing data arrangement of a storage device including:

• at least one client;
• and
• a switch device logically disposed between the client and at least one server including a storage device, for providing to the client a file access implemented by virtually unifying a plurality of storage devices, said method comprising the steps of:
• obtaining log information on the file access from the client to one of said storage devices, by said switch device;
• and
• determining data to be migrated from said storage device to another storage device based on the log information obtained by said switch device and a predetermined rule for determining an object to be migrated, by an analysis device.

A controller including:

• a switch device logically disposed between at least one client and at least one server which includes a storage device, for providing to the client a file access virtually unifying a plurality of storage devices;
• and
• an analysis device connected to the switch device;
• wherein the switch device receives log information on the file access from the client;
• the analysis device comprises means for determining data to be migrated from the storage device of the server in a site different from a site to which the client belongs to the server in the site to which the client belongs or in a site in the vicinity of said site to which the client belongs and commanding the switch device to migrate the data, based on the file access log information obtained by the switch device;
• and
• the switch device migrates the data from the storage device of the server in said another one of said sites to the storage device of said one of said sites to which the client belongs or said other one of said sites in the vicinity of said one of said sites to which the client belongs, based on the command from the analysis device.

A computer program for causing a computer constituting a controller including a switching module logically disposed between at least one client and at least one server which includes a storage device, for providing to the client a file access virtually unifying a plurality of storage devices;

• and
• an analysis module for calculating information on a file access by the client;
• said processing comprising the steps of:
• receiving log information on the file access from the client by said switching module;
• determining data to be migrated from the storage device of the server in a site different from a site to which the client belongs to the server in the site to which the client belongs or in a site in the vicinity of said site to which the client belongs and commanding the switching module to migrate the data, based on the file access log information obtained by said switching module;
• and
• migrating the data from the storage device of the server in said another site to the storage device of said site to which the client belongs or said other one of said sites in the vicinity of said one of said sites to which the client belongs, based on the command from said analysis module, by said switching module.