摘要:
A storage system and snapshot method wherein after a first processor transfers data stored in a first data area to a second storage system, the first processor transfers a first marker stored in a first marker area to a second storage system so that the first marker is stored in a second marker area of a second volume, wherein a second processor checks whether the first marker stored in the second storage area of the second volume corresponds to a second marker designated, and wherein, if the first marker stored in the second storage are of the second volume is a second marker designated, the second processor creates a snapshot of the data that is stored in the second data area, in a third storage volume.
摘要:
If a monitor measurement cycle is set as a long cycle, promotion in a short cycle cannot be performed; and even if the number of I/Os is very large in response to fluctuations of the number of I/Os in several minutes to several hours of normal work, pages will be promoted after waiting for several weeks. As a result, I/Os which could have normally accepted by an upper tier will be accepted by a lower tier, which results in a problem of worsening the performance efficiency. A monitoring system capable of preventing demotion due to temporary reduction of the number of I/Os for specific pages from a viewpoint of a long cycle and enabling prompt promotion in response to an increase of the number of U/Os for 3 the specific pages is realized.A load index value defined from a viewpoint of a long cycle and a load index value defined from a viewpoint of a short cycle are updated based on the number of I/Os which is counted cyclically for each storage area. Promotion and demotion are implemented based on a value(s) calculated from these load index values.
摘要:
A storage system and snapshot method wherein after a first processor transfers data stored in a first data area to a second storage system, the first processor transfers a first marker stored in a first marker area to a second storage system so that the first marker is stored in a second marker area of a second volume, wherein a second processor checks whether the first marker stored in the second storage area of the second volume corresponds to a second marker designated, and wherein, if the first marker stored in the second storage are of the second volume is a second marker designated, the second processor creates a snapshot of the data that is stored in the second data area, in a third storage volume.
摘要:
This computer system includes a first storage system and a second storage system. The first storage system has a data transfer unit for transferring the data stored in the first volume to the second volume of the second storage system. The second storage system has a snapshot creation unit for creating a snapshot of the second volume in a third volume based on a snapshot creation command. When the snapshot creation unit receives the snapshot creation command while transferring the data from the first volume to the second volume with the data transfer unit, it delays the creation of the snapshot of the second volume in the third volume until the transfer of the data from the first volume to the second volume is complete.
摘要:
The present invention creates a pool comprising tiers corresponding to the performance of logical volumes.A first storage apparatus either acquires or measures the performance of multiple external pool volumes of an external storage (S1711 through S1714), and creates a pool volume group based on the performance of the external pool volumes (S1715, S1716). The rank order of a tier is decided in accordance with the performance of each pool volume group (S1717, S1718). This makes it possible to relatively easily create a pool comprising multiple appropriate tiers that are suited to the current situation.
摘要:
The present invention creates a pool comprising tiers corresponding to the performance of logical volumes.A first storage apparatus either acquires or measures the performance of multiple external pool volumes of an external storage (S1711 through S1714), and creates a pool volume group based on the performance of the external pool volumes (S1715, S1716). The rank order of a tier is decided in accordance with the performance of each pool volume group (S1717, S1718). This makes it possible to relatively easily create a pool comprising multiple appropriate tiers that are suited to the current situation.
摘要:
Availability of an information system including a storage system that performs remote copy between two or more storage apparatuses and a host computer using such storage system is improved. A third storage apparatus including a third volume is coupled to a first storage apparatus, a fourth storage apparatus including a fourth volume is coupled to a second storage apparatus, the first and third storage apparatuses perform remote copy of copying data stored in a first volume to the third volume, the first and second storage apparatuses perform remote copy of copying data stored in the first volume to a second volume, and the third and fourth storage apparatuses perform remote copy of copying data stored in the third volume to the fourth volume.
摘要:
Storage arrangements including: a first storage system including: a first volume which includes a first data area storing data sent from a computer; and a first processor which stores data sent from the computer in the first volume; a second storage system including: a second volume which includes a second data area; a third volume; and a second processor which is configured to store data sent from the first storage system in the second volume; wherein the first processor transfers the data stored in the first data area of the first volume, to the second storage system, and the second processor stores the data in the second data area of the second volume; and wherein in executing a snapshot, the second processor checks and waits until a local copy control flag of the data that is stored in the second data area, is a predetermined value, before executing the snapshot.
摘要:
Availability of an information system including a storage system that performs remote copy between two or more storage apparatuses and a host computer using such storage system is improved. A third storage apparatus including a third volume is coupled to a first storage apparatus, a fourth storage apparatus including a fourth volume is coupled to a second storage apparatus, the first and third storage apparatuses perform remote copy of copying data stored in a first volume to the third volume, the first and second storage apparatuses perform remote copy of copying data stored in the first volume to a second volume, and the third and fourth storage apparatuses perform remote copy of copying data stored in the third volume to the fourth volume.
摘要:
If a monitor measurement cycle is set as a long cycle, promotion in a short cycle cannot be performed; and even if the number of I/Os is very large in response to fluctuations of the number of I/Os in several minutes to several hours of normal work, pages will be promoted after waiting for several weeks. As a result, I/Os which could have normally accepted by an upper tier will be accepted by a lower tier, which results in a problem of worsening the performance efficiency. A monitoring system capable of preventing demotion due to temporary reduction of the number of I/Os for specific pages from a viewpoint of a long cycle and enabling prompt promotion in response to an increase of the number of U/Os for 3the specific pages is realized.A load index value defined from a viewpoint of a long cycle and a load index value defined from a viewpoint of a short cycle are updated based on the number of I/Os which is counted cyclically for each storage area. Promotion and demotion are implemented based on a value(s) calculated from these load index values.