Management system and management method for computer system comprising remote copy system for performing asynchronous remote copy

A computer program executed on a computer for managing a computer system that includes a remote copy system for performing asynchronous remote copy,

• wherein the remote copy system comprises a primary storage system, and a secondary storage system connected to the primary storage system,
• the primary storage system comprises a primary volume into which data is written, and a primary journal storage area into which is written a journal comprising the data written to the primary volume, and transfers the journal that has been written to the primary journal storage area to the secondary storage system, and
• the secondary storage system comprises a secondary journal storage area into which the journal from the primary storage system is written, and a secondary volume into which is written the data inside the journal being stored in the secondary journal storage area,
• the computer system further comprises a host computer that sends a write request specifying the primary volume,
• the computer program being configured to:
• refer to management information that includes a plurality of delay durations that respectively correspond to a plurality of times and a plurality of metric values that respectively correspond to the plurality of times for the primary volume, wherein for each delay duration, a start time is either a time at which data was stored in the primary volume, or a time at which a journal comprising this data was stored in the primary journal storage area, and an end time is either a time at which this journal was stored in the secondary journal storage area, or a time at which data inside this journal was stored in the secondary volume;
• and
• display, based on the management information, a delay duration graph representing a fluctuation in delay duration associated with the passage of time and an average-of-writing-quantity graph representing a fluctuation in average of writing quantity associated with the passage of time, in a mode that enables comparison between the two graphs, the average of writing quantity being an amount of data written to the primary volume per write request.

A management method for a computer system that includes a remote copy system for performing asynchronous remote copy,

• wherein the remote copy system comprises a primary storage system, and a secondary storage system connected to the primary storage system,
• the primary storage system comprises a primary volume into which data is written, and a primary journal storage area into which is written a journal comprising the data written to the primary volume, and transfers the journal that has been written to the primary journal storage area to the secondary storage system, and
• the secondary storage system comprises a secondary journal storage area into which the journal from the primary storage system is written, and a secondary volume into which is written the data inside the journal being stored in the secondary journal storage area,
• the computer system further comprises a host computer that sends a write request specifying the primary volume,
• the management method comprising:
• referring to management information that includes a plurality of delay durations that respectively correspond to a plurality of times, and a plurality of metric values that respectively correspond to the plurality of times for the primary volume, wherein for each delay duration, a start time is either a time at which data was stored in the primary volume, or a time at which a journal comprising this data was stored in the primary journal storage area, and an end time is either a time at which this journal was stored in the secondary journal storage area, or a time at which data inside this journal was stored in the secondary volume;
• and
• displaying, based on the management information, a delay duration graph representing a fluctuation in delay duration associated with the passage of time and an average-of-writing-quantity graph representing a fluctuation in average of writing quantity associated with the passage of time in a mode that enables comparison between the two graphs, the average of writing quantity being an amount of data written to the primary volume per write request.