公开(公告)号：AT482430T

公开(公告)日：2010-10-15

申请号：AT09711029

申请日：2009-02-09

Applicant: IBM

Inventor： CASPER DANIEL ,  BENDYK MARK ,  HATHORN ROGER ,  FLANAGAN JOHN ,  HARDY CLINT ,  HUANG CATHERINE ,  KALOS MATTHEW ,  RICCI LOUIS ,  SITTMANN III GUSTAV ,  YUDENFRIEND HARRY

IPC: G06F13/14

公开(公告)号：CA2704136A1

公开(公告)日：2009-08-20

申请号：CA2704136

申请日：2009-02-09

Applicant: IBM

Inventor： CASPER DANIEL ,  CARLSON SCOTT ,  FLANAGAN JOHN ,  HATHORN ROGER ,  HUANG CATHERINE ,  KALOS MATTHEW ,  RICCI LOUIS ,  RIEDY DALE ,  SITTMANN GUSTAV III ,  NJOKU UGOCHUKWU ,  YUDENFRIEND HARRY

IPC: G06F13/12

Abstract: A state of an input/output (I/O) operation in an I/O processing system is determined. A request for performing the I/O operation is received from an I/O operating system at a channel subsystem and forwarded to a control unit controlling an I/O device for executing the I/O operation. After a predetermined amount of time passes without receiving indication from the control unit that the I/O operation is completed, an interrogation request is received at the channel subsystem from the I/O operating system for determining the state of the I/O operation. An interrogation command is sent from the channel subsystem to the control unit. A response is received from the control unit, the response indicates a state of the I/O device executing the I/O operation, a state of the control unit controlling the I/O device executing the I/O operation, and the state of the I/O operation being executed.

公开(公告)号：CA2493730A1

公开(公告)日：2004-02-05

申请号：CA2493730

申请日：2003-07-17

Applicant: IBM

Inventor： DUGAN ROBERT ,  HUANG CATHERINE ,  HATHORN ROGER ,  FLANAGAN JOHN ,  FRAZIER GILES ,  MILLER WILLIAM

IPC: H04L12/56 ,  G06F13/38

Abstract: State information is communicated in a network to more efficiently utilize network resources. A first node forms a single extended query requesting sta te information from at least one logical image of a second node. The extended query is a single query requesting state information for multiple logical images of the first node. The requested state information includes the statu s of logical paths previously established between the multiple logical images of the first node and the at least one logical image of the second node. Upon sending the extended query to the second node, a single extended response ca n be formed at the second node having the requested state information.