Browse Prior Art Database

System Recovery Criteria

IP.com Disclosure Number: IPCOM000115638D
Original Publication Date: 1995-Jun-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 52K

Publishing Venue

IBM

Related People

Sutton, AJ: AUTHOR

Abstract

Disclosed is a mechanism to allow a computer system operator to establish recovery criteria for specific hardware failures within the system.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 62% of the total text.

System Recovery Criteria

      Disclosed is a mechanism to allow a computer system operator to
establish recovery criteria for specific hardware failures within the
system.

      This design is directed toward SYSPLEX type configurations that
have a backup system that can be activated to do a takeover when the
active system falls below the criteria established.

      The mechanism is an operator display frame, with options to
display a full frame priority message on the system console with
alarm or a frame, alarm and reset of the I/O Interface to free any
shared I/O devices between the active and backup system.

      Options supported are to be alerted when the number of
processors, vectors, cryptographic or I/O Processors falls below the
number required to be available, for example 4 processors in a 6
processor system.  Having only 4 processors may fall below the
performance criteria of the system and the option will be set so as
to be alerted to this fact or to system checkstop the system and
reset the I/O interface.  The message can also be detected by a focal
point system and invoke the takeover.

      Other options provided, are recovery thresholds or events
detected by the system error handler that are not observable to the
system operator, that may affect the performance of the system or
potentially lead the system to a system checkstop or hung condition.
Examples are storing a special uncorrectable error in storage (used
to protect data int...