Title:
TRANSACTION OBJECT OPERATION METHOD FOR STORAGE SYSTEM
Document Type and Number:
Japanese Patent JP3618426
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for operating a transaction object while maintaining the completeness of data at the time of a power source fault in a controller such as a disk array controller or the like.
SOLUTION: The transaction object 10 is provided with a roll-forward log 12 for holding an operation item to be executed and a roll-back 14 for listing the already executed operation items. When the power source fault is generated, the controller judges whether the controller is to complete an operation by using the roll-forward log 12 or to cancel the operation by using the roll-back log 14 when power is restored. This method is actually provided with a simple sequence adjusted to a single instruction for clearing the roll-back log 14 for making the judgement and thus making the entire operation atomic to the power source fault.
Inventors:
Douglas El Voight
Application Number:
JP30063395A
Publication Date:
February 09, 2005
Filing Date:
October 25, 1995
Export Citation:
Assignee:
HEWLETT-PACKARD COMPANY
International Classes:
G06F1/30; G06F3/06; G06F11/14; (IPC1-7): G06F1/30; G06F3/06
Attorney, Agent or Firm:
Next student Okada
Previous Patent: LOGIC CIRCUIT OF LOW POWER CONSUMPTION
Next Patent: GENERATING DEVICE FOR DRIVEN-SIDE STATION OF CABLEWAY
Next Patent: GENERATING DEVICE FOR DRIVEN-SIDE STATION OF CABLEWAY