Computer system, data management method, and program

A data management method in a computer system formed of one or more computers and one or more secondary storages, the method comprising:

• a first step of unifying said secondary storages and managing the unified secondary storages as a virtual storage device;
• a second step of obtaining configuration information of physical storage devices forming said secondary storages;
• a third step of obtaining performance statistical information collected in said secondary storages and relating said virtual storage device and the performance statistical information collected in said secondary storages to a table;
• and
• a fourth step of deciding whether the secondary storage used as said virtual storage device is changed from a first secondary storage unified into said virtual storage device to a second secondary storage not unified into said virtual storage device when first information included in said performance statistical information exceeds the threshold.

A program which executes a data management method in a computer system formed of one or more computers and one or more secondary storages, the program executing:

• a first step of unifying said secondary storages and managing the unified secondary storages as a virtual storage device;
• a second step of obtaining configuration information of physical storage devices forming said secondary storages;
• a third step of obtaining performance statistical information collected in said secondary storages and relating said virtual storage device and the performance statistical information collected in said secondary storages to a table;
• and
• a fourth step of deciding whether the secondary storage used as said virtual storage device is changed from a first secondary storage unified into said virtual storage device to a second secondary storage not unified into said virtual storage device when first information included in said performance statistical information exceeds a threshold.

A computer system formed of one or more computers, one or more secondary storages, and a computer for managing the secondary storages which is communicable with said secondary storages, the system comprising:

• first means which unifies said secondary storages and manages the unified secondary storages as a virtual storage device;
• and
• second means which obtains configuration information of physical storage devices forming said secondary storages,
• wherein said computer for managing the secondary storages includes third means which obtains performance statistical information of said secondary storages and a table which relates said virtual storage device and the performance statistical information of said secondary storages.

A data management method in a computer system formed of one or more computers, one or more secondary storages, and a computer for managing the secondary storages which is communicable with said secondary storages, the method comprising:

• a first step of unifying said secondary storages and managing the unified secondary storages as a virtual storage device;
• a second step of obtaining configuration information of physical storage devices forming said secondary storages;
• a third step, performed by said computer for managing the secondary storages, of obtaining performance statistical information of the secondary storages and relating said virtual storage device and the performance statistical information of said secondary storages to a table;
• and
• a fourth step, performed by said computer for managing the secondary storages, of deciding whether a secondary storage used as said virtual storage device is changed from a first secondary storage unified into said virtual storage device to a second secondary storage not unified into said virtual storage device when first information included in said performance statistical information exceeds a threshold.

A program which executes a data management method in a computer system formed of one or more computers, one or more secondary storages, and a computer for managing the secondary storages which is communicable with said secondary storages, the program executing:

• a first step of unifying said secondary storages and managing the unified secondary storages as a virtual storage device;
• a second step of obtaining configuration information of physical storage devices forming said secondary storages;
• a third step, performed by said computer for managing the secondary storages, of obtaining performance statistical information of said secondary storages and relating said virtual storage device and the performance statistical information of said secondary storages to a table;
• and
• a fourth step, performed by said computer for managing the secondary storages, of deciding whether the secondary storage used as said virtual storage device is changed from a first secondary storage unified into said virtual storage device to a second secondary storage not unified into said virtual storage device when first information included in said performance statistical information exceeds a threshold.

A computer system formed of one or more computers, one or more secondary storages, and a computer for managing the secondary storages which is communicable with said secondary storages, the system comprising:

• first means which unifies said secondary storages and manages the unified secondary storages as a virtual storage device;
• and
• in the case where a mirror in which a first secondary storage and a second secondary storage have same contents can be formed as said virtual storage device and said secondary storages and said computer for managing the secondary storages have a function of data copying among the secondary storages,
• second means which decides, by using a table which relates said virtual storage device and said secondary storages, whether said function of data copying among the secondary storages can be used for synchronization of the contents of said first and second secondary storages to form the mirror between said first and second secondary storages.

A data management method in a computer system formed of one or more computers, one or more secondary storages, and a computer for managing the secondary storages which is communicable with said secondary storages, the method comprising:

• a first step of unifying said secondary storages and managing the unified secondary storages as a virtual storage device;
• and
• in the case where a mirror in which a first secondary storage and a second secondary storage have same contents can be formed as said virtual storage device and said secondary storages and said computer for managing the secondary storages have a function of data copying among the secondary storages,
• a second step of deciding, by using a table which relates said virtual storage device and said secondary storages, whether said function of data copying among the secondary storages can be used for synchronization of the contents of said first and second secondary storages to form the mirror between said first and second secondary storages.

A program which executes a data management method in a computer system formed of one or more computers, one or more secondary storages, and a computer for managing the secondary storages which is communicable with said secondary storages, the program executing:

• a first step of unifying said secondary storages and managing the unified secondary storages as a virtual storage device;
• and
• in the case where a mirror in which a first secondary storage and a second secondary storage have same contents can be formed as said virtual storage device and the secondary storages and said computer for managing the secondary storages have a function of data copying among the secondary storages,
• a second step of deciding, by using a table which relates said virtual storage device and said secondary storages, whether said function of data copying among the secondary storages can be used for synchronization of the contents of said first and second secondary storages to form the mirror between said first and second secondary storages.