Selective copying of track data based on track data characteristics through map-mediated peer-to-peer remote copy

摘要

In one embodiment, a method includes receiving a request to establish a Peer-to-Peer Remote Copy (PPRC) relationship between a primary storage system and a secondary storage system, and copying one or more data tracks of a primary storage device in the primary storage system to the secondary storage system without copying at least one other data track of the primary storage device to the secondary storage system. The one or more data tracks of the primary storage device comprise one or more data tracks of a first characteristic. Other portions of the primary storage device comprise one or more other data tracks of a second characteristic.

主权项

1. A primary storage system, comprising:
at least one primary storage device; an interface for a hardwire connection that is configured to communicate data between the primary storage system and a secondary storage system; at least one controller; and logic integrated with and/or executable by the at least one controller, the logic being configured to:
receive a request to establish a Peer-to-Peer Remote Copy (PPRC) relationship between the primary storage system and the secondary storage system;copy one or more data tracks of the primary storage device to the secondary storage system without copying at least one other data track of the primary storage device to the secondary storage system;set a path between the primary storage system and the secondary storage system via the hardwire connection in response to receiving the request;receive a memory map; andestablish the PPRC relationship between the primary storage system and the secondary storage system in response to receiving the memory map; and wherein the one or more data tracks of the primary storage device comprise data tracks of a first characteristic, wherein the data tracks of the first characteristic comprise valid data records, and wherein other portions of the primary storage device comprise one or more other data tracks of a second characteristic, wherein the data tracks of the second characteristic comprise one or more of:
invalid data records; andempty data tracks; and wherein an amount of time required to copy the one or more data tracks of the primary storage device is directly proportional to a number of data tracks of the primary device to be copied to the secondary storage system; wherein an amount of time required to copy the one or more data tracks of the primary storage device is directly proportional to a number of data tracks of the first characteristic; wherein the one or more data tracks are copied based at least in part on a memory map, wherein the memory map is generated by software for use by the at least one controller; wherein the memory map is an out-of-sync (OOS) bit map generated based at least in part on a track bit map; wherein the primary storage device is a direct-access storage device (DASD); wherein the request comprises a channel command word (CCW); and wherein the at least one controller comprises a memory subsystem controller.