Throttling in storage systems

Details Throttling in storage systems Throttling in storage systems

2006-10-24

2006-10-24

Bataille, Pierre (Department: 2186)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S170000, C711S113000, C709S235000

Reexamination Certificate

active

07127568

ABSTRACT:
A method is provided for improving the performance of copy operations in storage systems. The method includes storing a measure of relative availability of storage system resources, detecting operations when sequential portions of a storage media are to be accessed for writing of information, and when the measure of relative availability of system resources drops to a specified extent, introducing a wait into the operation in which sequential portions of a storage media are to be accessed for writing of information. In another implementation, a method is provided for controlling writing of data in a storage system in which a step is performed of analyzing a requested write operation to determine if the requested write operation calls for a sequential task or a random task. If the requested write operation is a sequential task, information about it is stored in a task management table. the table is used to determine if throttling is needed to carry out the requested write operation, and invokes throttling if it is needed.

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