公开(公告)号：GB2514354A

公开(公告)日：2014-11-26

申请号：GB201309062

申请日：2013-05-20

Applicant: IBM

Inventor： HUTCHISON GORDON DOUGLAS ,  ROGERS NOLAN ,  SMITH BRUCE ,  PARKES JON

IPC: G06F11/30 ,  G06F3/06

Abstract: A storage system consists of number of storage devices. The storage devices have a limit on the number operations of that can be performed on the device. The devices may be solid state devices, which have a limit on the number of program/erase cycles performed. The storage system estimates the date that each device will reach the limit. For each date, it then calculates how many devices will reach the limit within a predetermined period of time of that date. If the number of devices divided by the period is greater than the average rate of all devices reaching the limit, then an action is carried out to reduce the number. The action may increase the number of operations to a device estimated to reach the limit before the date. The action may decrease the number of operations to a device estimated to reach the limit after the date.

公开(公告)号：AT525695T

公开(公告)日：2011-10-15

申请号：AT09740695

申请日：2009-10-26

Applicant: IBM

Inventor： HUTCHISON GORDON ,  MCALLISTER CAMERON ,  RAW LUCY ,  SMITH BRUCE

IPC: G06F11/14

Abstract: A method of performing a data write on a storage device comprises instructing a device driver for the device to perform a write to the storage device, registering the device driver as a transaction participant with a transaction co-ordinator, executing a flashcopy of the storage device, performing the write on the storage device, and performing a two-phase commit between device driver and transaction co-ordinator. Preferably, the method comprises receiving an instruction to perform a rollback, and reversing the data write according to the flashcopy. In a further refinement, a method of scheduling a flashcopy of a storage device comprises receiving an instruction to perform a flashcopy, ascertaining the current transaction in relation to the device, registering the device driver for the device as a transaction participant in the current transaction with a transaction co-ordinator, receiving a transaction complete indication from the co-ordinator, and executing the flashcopy for the device.