×

Four way support for dynamic mirror service policy

  • US 6,633,955 B1
  • Filed: 09/27/2001
  • Issued: 10/14/2003
  • Est. Priority Date: 09/27/2001
  • Status: Expired due to Term
First Claim
Patent Images

1. A method executed in a computer system for selecting a mirror device from a plurality of mirror devices for a logical volume comprising:

  • collecting activity data of said at least one logical volume;

    determining an activity level of each of said plurality of mirror devices;

    selecting one of said plurality of mirror devices to service said logical volume in accordance with a load balancing policy of said mirror devices, said logical volume being one of a plurality of logical volumes; and

    performing seek minimization processing that includes swapping first and second mirror devices in accordance with predetermined criteria, said first mirror device being selected to service requests of a first logical volume and said second mirror device being selected to service requests of a second logical volume, said predetermined criteria including a first identifier associated with said first mirror device that does not correspond to a second identifier associated with a first portion of said first mirror device, said first portion identifying a location at which a mirrored portion of said first logical volume is to be stored, a third identifier associated with said second mirror device that does not correspond to a fourth identifier associated with a second portion of said second mirror device, said second portion identifying a location at which a mirrored portion of said second logical volume is to be stored, said third identifier corresponding to said second identifier.

View all claims
  • 9 Assignments
Timeline View
Assignment View
    ×
    ×