摘要:
An apparatus for configuring data migration comprises a host computer, a first volume, a second volume, a storage area network (SAN) configured to couple the host computer, the first volume, and the second volume, a memory coupled to the second volume, and a processor configured to map the first volume to the host computer; to copy a volume identifier associated with the mapped first volume to the memory, to retrieve, by the host computer, the copied volume identifier from the memory, to set a state of the second volume to inactive, to map the inactive second volume to the host computer, to set a state of the mapped first volume to inactive, to synchronize status data between the inactive first volume and the inactive second volume, after the copying, to start data migration from the inactive first volume to the inactive second volume, and after the starting, to set the state of the second volume to active.
摘要:
A method for configuring transparent synchronous mirroring volume switching for a first volume and a second volume that are coupled, via a storage area network, to a host computer, with the first volume mapped to the host computer, by. The method includes initiating synchronization of status data between the first volume and the second volume, and setting the first volume to an active state. The second volume is set to an inactive state, and an identifier associated with the active first volume is copied to a memory coupled to the inactive second volume. The copied identifier is retrieved from the memory by the host computer, and the inactive second volume is then mapped to the host computer.
摘要:
A data storage system including at least one storage controller having a first color policy and operative to store data onto a first data storage unit at a primary site as part of a current color of the primary site, at least one storage controller having a second color policy and operative to store data onto a second data storage unit at the primary site as part of the current color, and a color control node operative to provide each of the controllers with new color information while maintaining the integrity of dependent writes across color boundaries.
摘要:
A data storage system including at least one storage controller having a first color policy and operative to store data onto a first data storage unit at a primary site as part of a current color of the primary site, at least one storage controller having a second color policy and operative to store data onto a second data storage unit at the primary site as part of the current color, and a color control node operative to provide each of the controllers with new color information while maintaining the integrity of dependent writes across color boundaries.
摘要:
A method for configuring transparent synchronous mirroring volume switching for a first volume and a second volume that are coupled, via a storage area network, to a host computer, with the first volume mapped to the host computer. The method includes initiating synchronization of status data between the first volume and the second volume, and setting the first volume to an active state. The second volume is set to an inactive state, and an identifier associated with the active first volume is copied to a memory coupled to the inactive second volume. The copied identifier is retrieved from the memory by the host computer, and the inactive second volume is then mapped to the host computer.
摘要:
A method for configuring transparent synchronous mirroring volume switching for a first volume and a second volume that are coupled, via a storage area network, to a host computer, with the first volume mapped to the host computer, by. The method includes initiating synchronization of status data between the first volume and the second volume, and setting the first volume to an active state. The second volume is set to an inactive state, and an identifier associated with the active first volume is copied to a memory coupled to the inactive second volume. The copied identifier is retrieved from the memory by the host computer, and the inactive second volume is then mapped to the host computer.
摘要:
Exemplary method, system, and computer program product embodiments for performing a snapshot for monitoring usage of one or more data units are provided. In one embodiment, by way of example only, a fast snapshot is configured to store a state of a computing environment at a point in time. The fast snapshot operation is performed by avoiding reference counts of one or more data units associated with the snapshot from being updated at a creation and a deletion time. Additional system and computer program product embodiments are disclosed and provide related advantages.
摘要:
A method for maintaining a bit map of data writes, the method including associating each of a plurality of bit groups in a bit map with a different one of a plurality of segments of a data storage device, where each of the bit groups includes a plurality of bits, and setting any of the bits in any of the bit groups to indicate that any portion of the segment corresponding to the bit group has been written to, where the write order of any two of the plurality of segments that have been written to is preserved by their corresponding set bit groups.
摘要:
A method, including configuring data migration from a first volume to a second volume, which are coupled via a storage area network (SAN) to a host computer, with the first volume mapped to the host computer. A volume identifier associated with the first volume is copied to a memory coupled to the second volume, and the copied volume identifier is retrieved from the memory by the host computer. A state of the second volume is set to inactive, and the inactive second volume is mapped to the host computer. A state of the first volume is set to inactive, and the status is data from the inactive first volume to the inactive second volume. After the copying, data migration is started from the inactive first volume to the inactive second volume, and after the starting, the state of the second volume is set to active.
摘要:
A method, including configuring data migration from a first volume to a second volume, which are coupled via a storage area network (SAN) to a host computer, with the first volume mapped to the host computer. A volume identifier associated with the first volume is copied to a memory coupled to the second volume, and the copied volume identifier is retrieved from the memory by the host computer. A state of the second volume is to inactive, and the inactive second volume is mapped to the host computer. A state of the first volume is set to inactive, and the status is data from the inactive first volume to the inactive second volume. After the copying, data migration is started from the inactive first volume to the inactive second volume, and after the starting, the state of the second volume is set to active.