Valid parameters for CHECK(IBMXCF,XCF_SFM_CFSTRHANGTIME)
are CFSTRHANGTIME(NO | cfstrhangtime) where cfstrhangtime is
a decimal value between 0 and 1800 inclusive.
Explanation
The parameters for CHECK(IBMXCF,XCF_SFM_CFSTRHANGTIME)
correspond to the possible Sysplex Failure Management (SFM) policy
specifications describing the action to be taken if a coupling facility
(CF) structure connector fails to provide an expected response. They
are defined as follows:
- CFSTRHANGTIME
- Specifies the action to be taken if a CF structure connector fails
to provide an expected response.
- NO
- The system is not to take automatic action to resolve the hang
caused by the outstanding response. The check reports an exception
if the SFM policy does not specify or default to CFSTRHANGTIME(NO).
- cfstrhangtime
- The maximum acceptable time in seconds that a connector's response
is allowed to remain overdue (after message IXL040E or IXL041E has
been issued) before the system acts to relieve the hang. The check
will report an exception if the CFSTRHANGTIME value specified in the
SFM policy is greater than the value specified by the CFSTRHANGTIME
check parameter, or if the SFM policy specifies or defaults to CFSTRHANGTIME(NO).
Specify the parameters in an HZSPARM parmlib
member or on a MODIFY HZSPROC command, for example:
F HZSPROC,UPDATE,CHECK(IBMXCF,XCF_SFM_CFSTRHANGTIME),
PARM='CFSTRHANGTIME(300)'
System action
The system continues processing.
Operator response
System programmer response
Specify parameters to ensure that
the check reports an exception only when the SFM policy does not match
the desired hang termination behavior. The default parameters are
'CFSTRHANGTIME(300)', selected so that the SFM policy specifies some
limitation on the amount of time a CF structure-related process can
remain hung due to an overdue connector response, yet provide the
installation an opportunity to take manual action if desired.
Problem determination
Source
Module
Routing code
Descriptor code
Reference Documentation
For a discussion
of considerations in establishing the SFM policy, see "Controlling
System Availability and Recovery through the SFM Policy" in z/OS MVS
Setting Up a Sysplex.
For a description of the IXCMIAPU keywords
used in defining the SFM policy, see "SFM Parameters for Administrative
Data Utility" in z/OS MVS Setting Up a Sysplex.