US 7,117,327 B2 · Data processing system

A data processing system of the type comprising a plurality of storage systems each including a control section and storage devices whereby to have the functionality of storing data into storage areas, wherein the storage systems are interconnected by means of communication lines whereby replication of data is retained between the storage systems, wherein:

a first storage system retains first data as replication target data, a second storage system retains second data as replication data of the first data, and a third storage system retains third data as replication data of the first data;
in synchronization with data updating of the first data in the first storage system, the data processing system performs the processes of data updating of the second data stored in a data volume related to at least one disk drive in the second storage system in the second storage system, creating information regarding data updating of the first and second data as a journal including identifiers of data update sequence, and storing the journal into a journal volume related to at least one disk drive in at least any one of the first and second storage systems,
wherein the journal is stored in at least one of the first and second storage systems after the updating of the first data in the first storage system;
in asynchronization with the data updating of the first data in the first storage system, the data processing system performs transfer to store the journal into a journal volume related to at least one disk drive in the third storage system, and the third storage system performs data updating of the third data in accordance with the data update sequence in the first storage system by using the third journal.

1 more element

A data processing system of the type, comprising a plurality of storage systems each including a control section and storage devices whereby to have the functionality of storing data into storage areas, wherein the storage systems are interconnected by means of communication lines whereby replication of data is retained between the storage systems, wherein:

a first storage system retains first data as replication target data, a second storage system retains second data as replication data of the first data, and a third storage system retains third data as replication data of the first data;
in accordance with an instruction received from a host computer, the first storage system performs data updating of the first data stored in the first journal into a first journal volume related to at least one disk drive in the first storage system, and making of an instruction for data updating of the second data to the second storage system in synchronization with the data updating via a communication line between the first and second storage systems and
wherein the first journal is stored in the first journal volume for a time period after the first storage system instructs data updating to second storage system, in accordance with the instruction for the data updating, the second storage system performs the data updating of the second data, creates information regarding the data updating as a journal including an identifier of data update sequence, and stores the journal into a storage area in the second storage system;
and
in asynchronization with the data updating of the first and second data stored in a data volume related to at least one disk drive in the second storage system, stores the second journal into a second journal volume related to at least one disk drive in the second storage system,
wherein the second journal is stored in the second journal volume for a time period after the first storage system instructs data updating to the third storage system;
wherein the third storage system retrieves the second journal from the second storage system via a communication line between the second and third storage systems, stores the second journal into a third journal volume related to at least one disk drive in the third storage system, and data updating of the third data stored in a data volume related to at least one drive in the third storage system is in accordance with the data update sequence in the first storage system by using the third journal.

4 more elements

A data processing system of the type comprising a plurality of storage systems each including a control section and storage devices whereby to have the functionality of storing data into storage areas, wherein the storage systems are interconnected by means of communication lines whereby replication of data is retained between the storage systems, wherein:

a first storage system retains first data as replication target data, a second storage system retains second data as replication data of the first data, and a third storage system retains third data as replication data of the first data;
a host computer performs information processing by accessing the first data by using the first storage system through a communication line;
in accordance with an instruction received from the host computer, the first storage system performs data updating of the first data stored in a data volume related to at least one disk drive in the first storage system, creates information regarding the data updating as a first journal including an identifier of data update sequence, stores the first journal into a first journal volume related to at least one disk drive in the first storage system and making of an instruction including the identifier for data updating of the second data to the second storage system in synchronization with the data updating via a communication line between the first and second storage systems;
wherein the first journal is stored in the first journal volume for a time period after the first storage system instructs data updating to second storage system,
wherein in accordance with the instruction for the data updating, the second storage system performs the data updating of the second data stored in a data volume related to at least one disk drive in the second storage system, creates information regarding the data updating as a second journal by using information including the identifier received from the first storage system, and stores the second journal into a second journal volume related to at least one disk drive in the second storage system;
wherein the second journal is stored in the second journal volume for a time period after the first storage system instructs data updating to the third storage system;
in asynchronization with the data updating of the first and second data, the third storage system retrieves the second journal from the second storage system via a communication line between the second and third storage systems, stores the second journal as a third journal into a third journal volume related to at least one disk drive in the third storage system and data updating of the third data stored in a data volume related to at least one drive in the third storage system is based on the identifier in accordance with the data update sequence of the first data in the first storage system by using the third journal;
and
in the event of failure occurrence, transfer of the each individual journals stored in the journal volumes is performed between the storage systems, and data updating is performed by using the transferred journals.

6 more elements

A data processing system of the type comprising a plurality of storage systems each including a control section and storage devices whereby to have the functionality of storing data into storage areas, wherein the storage systems are interconnected by means of communication lines whereby replication of data is retained between the storage systems, wherein:

a first storage system retains first data as replication target data, a second storage system retains second data as replication data of the first data, and a third storage system retains third data as replication data of the first data;
a host computer performs information processing by accessing the first data by using the first storage system through a communication line;
in accordance with an instruction received from the host computer, the first storage system performs data updating of the first data, creates of information regarding the data updating as a first journal including an identifier of data update sequence, stores the journal into a storage area in the first storage system, and making of an instruction including the identifier for data updating of the second data to the second storage system in synchronization with the data updating via a communication line between the first and second storage systems;
and in accordance with the instruction for the data updating, the second storage system performs the data updating of the second data, creates information regarding the data updating as a second journal by using information including the identifier received from the first storage system, and stores the second journal into a storage area in the second storage system;
and
in asynchronization with the data updating of the first and second data, the third storage system retrieves the second journal from the second storage system via a communication line between the second and third storage systems, stores the second journal as a third journal into a storage area of the third storage system, and data updating of the third data based on the identifier in accordance with the data update sequence of the first data in the first storage system by using the third journal;
and
in the event of failure occurrence, transfer of the each individual journal is performed between the storage systems, and data updating is performed by using the transferred journal,
wherein in the event that failure has occurred in the second storage system,
the third storage system obtains a differential with the third journal from the first journal of first storage system via a communication line between the first and third storage systems, stores the differential as the third journal into the storage area in the third storage system, and performs data updating of the third data based on the identifier in accordance with the data update sequence of the first data in the first storage system by using the third journal, wherein:
after the second storage system has recovered from the failure,
in asynchronization with the data updating of the first data, the second storage system retrieves data from the first journal of the first storage system via the communication line between the first and second storage systems, stores the data as the second journal into the storage area in the second storage system, and performs data updating of the second data based on the identifier in accordance with the data update sequence of the first data in the first storage system by using the second journal, wherein:
after the second storage system has recovered from the failure,
when the second storage system enters a state where retrieval from first journal of the first storage system has been completed and the data updating of the second data has been completed, the data replication of the first data in the first storage system and the second storage system is altered from the asynchronization process to the synchronization process, and the data updating of the second data is performed in synchronization with the data updating of the first data.

11 more elements

A data processing system of the type comprising a plurality of storage systems each including a control section and storage devices whereby to have the functionality of storing data into storage areas, wherein the storage systems are interconnected by means of communication lines whereby replication of data is retained between the storage systems, wherein:

a first storage system retains first data as replication target data, a second storage system retains second data as replication data of the first data, and a third storage system retains third data as replication data of the first data;
a host computer performs information processing by accessing the first data by using the first storage system through a communication line;
in accordance with an instruction received from the host computer, the first storage system performs data updating of the first data, creates of information regarding the data updating as a first journal including an identifier of data update sequence, stores the journal into a storage area in the first storage system, and making of an instruction including the identifier for data updating of the second data to the second storage system in synchronization with the data updating via a communication line between the first and second storage systems;
and in accordance with the instruction for the data updating, the second storage system performs the data updating of the second data, creates information regarding the data updating as a second journal by using information including the identifier received from the first storage system, and stores the second journal into a storage area in the second storage system;
and
in asynchronization with the data updating of the first and second data, the third storage system retrieves the second journal from the second storage system via a communication line between the second and third storage systems, stores the second journal as a third journal into a storage area of the third storage system, and data updating of the third data based on the identifier in accordance with the data update sequence of the first data in the first storage system by using the third journal;
and
in the event of failure occurrence, transfer of the each individual journal is performed between the storage systems, and data updating is performed by using the transferred journal, wherein:
in the event that failure has occurred in a first host computer that performs information processing by accessing the first data by using the first storage system,
when performing continuation/resumption of processing by using the second storage system and a second host computer using the second storage system,
the second storage system performs the data updating of the second data in accordance with an instruction received from the second host computer, creates information regarding the data updating as the second journal including the identifier, stores the second journal into the storage area in the second storage system, making of an instruction including the identifier for data updating of the first data to the first storage system in synchronization with the data updating via a communication line between the first and second storage systems;
and in accordance with the instruction for the data updating, the first storage system performs the data updating of the first data, creates information regarding the data updating as the first journal by using the identifier, and stores the first journal into the storage area in the first storage system.

9 more elements

A data processing system of the type comprising a plurality of storage systems each including a control section and storage devices whereby to have the functionality of storing data into storage areas, wherein the storage systems are interconnected by means of communication lines whereby replication of data is retained between the storage systems, wherein:

a first storage system retains first data as replication target data, a second storage system retains second data as replication data of the first data, and a third storage system retains third data as replication data of the first data;
a host computer performs information processing by accessing the first data by using the first storage system through a communication line;
in accordance with an instruction received from the host computer, the first storage system performs data updating of the first data, creates of information regarding the data updating as a first journal including an identifier of data update sequence, stores the journal into a storage area in the first storage system, and making of an instruction including the identifier for data updating of the second data to the second storage system in synchronization with the data updating via a communication line between the first and second storage systems;
and in accordance with the instruction for the data updating, the second storage system performs the data updating of the second data, creates information regarding the data updating as a second journal by using information including the identifier received from the first storage system, and stores the second journal into a storage area in the second storage system;
and
in asynchronization with the data updating of the first and second data, the third storage system retrieves the second journal from the second storage system via a communication line between the second and third storage systems, stores the second journal as a third journal into a storage area of the third storage system, and data updating of the third data based on the identifier in accordance with the data update sequence of the first data in the first storage system by using the third journal;
and
in the event of failure occurrence, transfer of the each individual journal is performed between the storage systems, and data updating is performed by using the transferred journal, wherein:
the each individual storage system registers a group of data required to follow the data update sequence, allocates an update number in units of data updating in data in the group, and includes information regarding the group into the journal;
and
in the storage system retaining the replication data, the data updating process is performed for the replication data in the sequence of the update number.

8 more elements

A data processing system of the type comprising a plurality of storage systems each including a control section and storage devices whereby to have the functionality of storing data into storage areas, wherein the storage systems are interconnected by means of communication lines whereby replication of data is retained between the storage systems, wherein:

a first storage system retains first data as replication target data, a second storage system retains second data as replication data of the first data, and a third storage system retains third data as replication data of the first data;
a host computer performs information processing by accessing the first data by using the first storage system through a communication line;
in accordance with an instruction received from the host computer, the first storage system performs data updating of the first data, creates of information regarding the data updating as a first journal including an identifier of data update sequence, stores the journal into a storage area in the first storage system, and making of an instruction including the identifier for data updating of the second data to the second storage system in synchronization with the data updating via a communication line between the first and second storage systems;
and in accordance with the instruction for the data updating, the second storage system performs the data updating of the second data, creates information regarding the data updating as a second journal by using information including the identifier received from the first storage system, and stores the second journal into a storage area in the second storage system;
and
in asynchronization with the data updating of the first and second data, the third storage system retrieves the second journal from the second storage system via a communication line between the second and third storage systems, stores the second journal as a third journal into a storage area of the third storage system, and data updating of the third data based on the identifier in accordance with the data update sequence of the first data in the first storage system by using the third journal;
and
in the event of failure occurrence, transfer of the each individual journal is performed between the storage systems, and data updating is performed by using the transferred journal, wherein:
the second storage system makes to the third storage system a write instruction for journal data from the second data, and in response thereto the third storage system receives the journal data and writes the data into the storage area.

6 more elements

A data processing system of the type comprising a plurality of storage systems each including a control section and storage devices whereby to have the functionality of storing data into storage areas, wherein the storage systems are interconnected by means of communication lines whereby replication of data is retained between the storage systems, wherein:

a first storage system retains first data as replication target data, a second storage system retains second data as replication data of the first data, and a third storage system retains third data as replication data of the first data;
a host computer performs information processing by accessing the first data by using the first storage system through a communication line;
in accordance with an instruction received from the host computer, the first storage system performs data updating of the first data, creates of information regarding the data updating as a first journal including an identifier of data update sequence, stores the journal into a storage area in the first storage system, and making of an instruction including the identifier for data updating of the second data to the second storage system in synchronization with the data updating via a communication line between the first and second storage systems;
and in accordance with the instruction for the data updating, the second storage system performs the data updating of the second data, creates information regarding the data updating as a second journal by using information including the identifier received from the first storage system, and stores the second journal into a storage area in the second storage system;
and
in asynchronization with the data updating of the first and second data, the third storage system retrieves the second journal from the second storage system via a communication line between the second and third storage systems, stores the second journal as a third journal into a storage area of the third storage system, and data updating of the third data based on the identifier in accordance with the data update sequence of the first data in the first storage system by using the third journal;
and
in the event of failure occurrence, transfer of the each individual journal is performed between the storage systems, and data updating is performed by using the transferred journal, wherein:
the timing with which journal transfer is performed between the storage systems in the asynchronization process is determined in accordance with the number of retained or exchanged journals in the storage systems.

6 more elements

A data processing system of the type comprising a plurality of storage systems each including a control section and storage devices whereby to have the functionality of storing data into storage areas, wherein the storage systems are interconnected by means of communication lines whereby replication of data is retained between the storage systems, wherein:

a first storage system retains first data as replication target data, a second storage system retains second data as replication data of the first data, and a third storage system retains third data as replication data of the first data;
a host computer performs information processing by accessing the first data by using the first storage system through a communication line;
in accordance with an instruction received from the host computer, the first storage system performs data updating of the first data, creates of information regarding the data updating as a first journal including an identifier of data update sequence, stores the journal into a storage area in the first storage system, and making of an instruction including the identifier for data updating of the second data to the second storage system in synchronization with the data updating via a communication line between the first and second storage systems;
and in accordance with the instruction for the data updating, the second storage system performs the data updating of the second data, creates information regarding the data updating as a second journal by using information including the identifier received from the first storage system, and stores the second journal into a storage area in the second storage system;
and
in asynchronization with the data updating of the first and second data, the third storage system retrieves the second journal from the second storage system via a communication line between the second and third storage systems, stores the second journal as a third journal into a storage area of the third storage system, and data updating of the third data based on the identifier in accordance with the data update sequence of the first data in the first storage system by using the third journal;
and
in the event of failure occurrence, transfer of the each individual journal is performed between the storage systems, and data updating is performed by using the transferred journal, wherein:
the each individual storage system stores the each individual journal into a journal-dedicated storage area in the own storage system, and frees the storage area from an oldest journal in the data update sequence in accordance with the identifier.

6 more elements

Data processing system

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Data processing system

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Abstract

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