Title:
TRANSACTION PROCESSING SYSTEM USING ASSUMED COMMITMENT 2-PHASE COMMITMENT PROTOCOL
Document Type and Number:
Japanese Patent JP2558052
Kind Code:
B2
Abstract:
PURPOSE: To eliminate the forced write of a log record by a regulator in a distributed transaction processing system using an assumed commitment 2-phase commitment protocol.
CONSTITUTION: When transaction is allocated with its identifier (TID) in an ascending order and transaction already prepares commitment, a commitment command is sent to a regulator process. Then the regulator process executes at a site with a permanent storage device and a nonvolatile memory to decide whether TID of commit-prepared transaction exists within the selection range. Then if TID of commit-prepared transaction exists within the selection range, the regulator process sends a preparation message to a subordinate slave process but if TID of commit-prepared transaction does not exist within the selection range, the regulator process writes a nonvolatile log record in the permanent storage device by including the log record of commitment-prepared transaction so that TID may exists within the selection range before sending the preparation message to the subordinate slave process.
Inventors:
RANPUSON BATORAA
ROMETSUTO DEIBITSUDO BII
ROMETSUTO DEIBITSUDO BII
Application Number:
JP15716593A
Publication Date:
November 27, 1996
Filing Date:
June 28, 1993
Export Citation:
Assignee:
DIGITAL EQUIPMENT CORP
International Classes:
G06F12/00; G06F9/46; G06F11/14; G06F15/16; G06F15/177; (IPC1-7): G06F12/00; G06F12/00; G06F15/16
Attorney, Agent or Firm:
Akihide Sugimura (5 outside)