Abstract: Provided are a computer program product, system, and method for using public keys provided by an authentication server to verify digital signatures. A plurality of public keys from a plurality of public-private key pairs and stored in a local key store. A request is received to access computational resources in the system. A challenge is returned in response to the request. A response to the challenge is received comprising a purported digitally signed challenge. A determination is made as to whether the purported digitally signed challenge is verified using a first public key of the public keys in the local key store. A determination is made as to whether the purported digitally signed challenge is verified using a second public key of the public keys in the local key store in response to determining that the first public key did not verify the purported digitally signed challenge.

Abstract: Provided are a computer program product, system, and method for generating public/private key pairs to deploy public keys at computing devices to verify digital signatures. A plurality of public-private key pairs are generated to store in a key store. A set of public keys of the public-private key pairs is distributed to the computing systems to use to verify purported digitally signed challenges. One of the public-private key pairs is selected to use a private key of the selected one of the public-private key pairs as a current private key to use to digitally sign challenges from the computing systems. A determination is made to retire the current private key. Another one of the public-private key pairs is selected and the current private key is set to a private key of the selected another one of the public-private key pairs to use to digitally sign challenges from the computing systems.

Abstract: Provided are a computer program product, system, and method for generating public/private key pairs to deploy public keys at computing devices to verify digital signatures. A plurality of public-private key pairs are generated to store in a key store. A set of public keys of the public-private key pairs is distributed to the computing systems to use to verify purported digitally signed challenges. One of the public-private key pairs is selected to use a private key of the selected one of the public-private key pairs as a current private key to use to digitally sign challenges from the computing systems. A determination is made to retire the current private key. Another one of the public-private key pairs is selected and the current private key is set to a private key of the selected another one of the public-private key pairs to use to digitally sign challenges from the computing systems.

Abstract: Provided are a computer program product, system, and method for generating public/private key pairs to deploy public keys at computing devices to verify digital signatures. A plurality of public-private key pairs are generated to store in a key store. A set of public keys of the public-private key pairs is distributed to the computing systems to use to verify purported digitally signed challenges. One of the public-private key pairs is selected to use a private key of the selected one of the public-private key pairs as a current private key to use to digitally sign challenges from the computing systems. A determination is made to retire the current private key. Another one of the public-private key pairs is selected and the current private key is set to a private key of the selected another one of the public-private key pairs to use to digitally sign challenges from the computing systems.

Abstract: Provided are a computer program product, system, and method for using public keys provided by an authentication server to verify digital signatures. A plurality of public keys from a plurality of public-private key pairs and stored in a local key store. A request is received to access computational resources in the system. A challenge is returned in response to the request. A response to the challenge is received comprising a purported digitally signed challenge. A determination is made as to whether the purported digitally signed challenge is verified using a first public key of the public keys in the local key store. A determination is made as to whether the purported digitally signed challenge is verified using a second public key of the public keys in the local key store in response to determining that the first public key did not verify the purported digitally signed challenge.

Abstract: Provided are a computer program product, system, and method for using public keys provided by an authentication server to verify digital signatures. A plurality of public keys from a plurality of public-private key pairs and stored in a local key store. A request is received to access computational resources in the system. A challenge is returned in response to the request. A response to the challenge is received comprising a purported digitally signed challenge. A determination is made as to whether the purported digitally signed challenge is verified using a first public key of the public keys in the local key store. A determination is made as to whether the purported digitally signed challenge is verified using a second public key of the public keys in the local key store in response to determining that the first public key did not verify the purported digitally signed challenge.

Abstract: Provided are a computer program product, system, and method for generating public/private key pairs to deploy public keys at computing devices to verify digital signatures. A plurality of public-private key pairs are generated to store in a key store. A set of public keys of the public-private key pairs is distributed to the computing systems to use to verify purported digitally signed challenges. One of the public-private key pairs is selected to use a private key of the selected one of the public-private key pairs as a current private key to use to digitally sign challenges from the computing systems. A determination is made to retire the current private key. Another one of the public-private key pairs is selected and the current private key is set to a private key of the selected another one of the public-private key pairs to use to digitally sign challenges from the computing systems.

Abstract: Provided are a computer program product, system, and method for using public keys provided by an authentication server to verify digital signatures. A plurality of public keys from a plurality of public-private key pairs and stored in a local key store. A request is received to access computational resources in the system. A challenge is returned in response to the request. A response to the challenge is received comprising a purported digitally signed challenge. A determination is made as to whether the purported digitally signed challenge is verified using a first public key of the public keys in the local key store. A determination is made as to whether the purported digitally signed challenge is verified using a second public key of the public keys in the local key store in response to determining that the first public key did not verify the purported digitally signed challenge.

Abstract: Provided are a computer program product, system, and method for embedding and executing trace functions in code to gather trace data. A plurality of trace functions are embedded in the code. For each embedded trace function, a trace level is included indicating code to which the trace applies. The trace level comprises one of a plurality of levels. During the execution of the code, the embedded trace functions having one of the levels associated with a specified at least one level specified are executed. The embedded trace functions associated with at least one level not comprising one of the at least one specified level are not invoked.

Abstract: Provided are a computer program product, system, and method for adjusting an extended power line disruption time and end-of-life for at least one battery backup unit used in a system. A request is received to change from a first extended power line disruption time currently used in the system to a second extended power line disruption time. A first end-of-life and a second end-of-life correspond to the first extended power line disruption time and the second extended power line disruption time, respectively. A message is sent to a power distribution unit with information on the second extended power line disruption time to cause the power distribution unit to initiate a graceful shutdown of the system after power is supplied from the at least one battery backup unit for the second extended power line disruption time.

Abstract: Provided are a computer program product, system, and method for adjusting an extended power line disruption time and end-of-life for at least one battery backup unit used in a system. A request is received to change from a first extended power line disruption time currently used in the system to a second extended power line disruption time. A first end-of-life and a second end-of-life correspond to the first extended power line disruption time and the second extended power line disruption time, respectively. A message is sent to a power distribution unit with information on the second extended power line disruption time to cause the power distribution unit to initiate a graceful shutdown of the system after power is supplied from the at least one battery backup unit for the second extended power line disruption time.

Abstract: A method for dynamically changing system recovery actions based on system load. The method includes measuring a value of a workload characteristic of a computer system over a period of time, detecting an error in the computer system, determining a workload level of the computer system, and selecting a set of error recovery actions in response to the system workload analysis module determining the workload level of the computer system. A workload characteristic defines a type of work performed by the computer system. A workload level can be based on user defined parameters or a measurement of the value of one or more workload characteristics.

Abstract: Provided are a computer program product, system, and method for embedding and executing trace functions in code to gather trace data. A plurality of trace functions are embedded in the code. For each embedded trace function, a trace level is included indicating code to which the trace applies. The trace level comprises one of a plurality of levels. During the execution of the code, the embedded trace functions having one of the levels associated with a specified at least one level specified are executed. The embedded trace functions associated with at least one level not comprising one of the at least one specified level are not invoked.

Abstract: Provided are a computer program product, system, and method for embedding and executing trace functions in code to gather trace data. A plurality of trace functions are embedded in the code. For each embedded trace function, a trace level is included indicating code to which the trace applies. The trace level comprises one of a plurality of levels. During the execution of the code, the embedded trace functions having one of the levels associated with a specified at least one level specified are executed. The embedded trace functions associated with at least one level not comprising one of the at least one specified level are not invoked.

Abstract: A method for dynamically changing system recovery actions based on system load. The method includes measuring a value of a workload characteristic of a computer system over a period of time, detecting an error in the computer system, determining a workload level of the computer system, and selecting a set of error recovery actions in response to the system workload analysis module determining the workload level of the computer system. A workload characteristic defines a type of work performed by the computer system. A workload level can be based on user defined parameters or a measurement of the value of one or more workload characteristics.

Abstract: Provided are a computer program product, system, and method for embedding and executing trace functions in code to gather trace data. A plurality of trace functions are embedded in the code. For each embedded trace function, a trace level is included indicating code to which the trace applies. The trace level comprises one of a plurality of levels. During the execution of the code, the embedded trace functions having one of the levels associated with a specified at least one level specified are executed. The embedded trace functions associated with at least one level not comprising one of the at least one specified level are not invoked.

Abstract: A computer program product for scheduling threads in a multiprocessor computer comprises computer program instructions configured to select a thread in a ready queue to be dispatched to a processor and determine whether an interrupt mask flag is set in a thread control block associated with the thread. If the interrupt mask flag is set in the thread control block associated with the thread, the computer program instructions are configured to select a processor, set a current processor priority register of the selected processor to least favored, and dispatch the thread from the ready queue to the selected processor.

Abstract: Methods, systems, and computer program products are provided for scheduling threads in a multiprocessor computer. Embodiments include selecting a thread in a ready queue to be dispatched to a processor and determining whether an interrupt mask flag is set in a thread control block associated with the thread. If the interrupt mask flag is set in the thread control block associated with the thread, embodiments typically include selecting a processor, setting a current processor priority register of the selected processor to least favored, and dispatching the thread from the ready queue to the selected processor. In some embodiments, setting the current processor priority register of the selected processor to least favored is carried out by storing a value associated with the highest interrupt priority in the current processor priority register.