Locking a non-busy device for accessing a data record stored on

Details Locking a non-busy device for accessing a data record stored on Locking a non-busy device for accessing a data record stored on

1993-04-01

1996-02-20

Swann, Tod R.

Boots, shoes, and leggings

395857, 395479, 395445, 395438, 364DIG1, 364DIG2, G06F 1314, G06F 1202

Patent

active

054937248

ABSTRACT:
A method and apparatus for improving storage controller throughput when servicing non-specific read requests. Throughput is increased by enabling the storage controller to service non-specific read requests issued against a device address which is not the same as the device address associated with the data that the non-specific read is requesting. The device address associated with the data is thus free to be used for another I/O operation. When the device address used by the non-specific read is a non-busy type (that is, the device and/or data is not locked) then the throughput improvement is obtained by increasing the number of data requests that may be concurrently handled by the storage controller.

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Enterprise Systems Architecture/390 "System/360 and System/370 I/O Interface Channel To Control Unit--Original Equipment Manufacturers' Information", IBM GA22-6974-10. Sep. 1992.

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