Abstract: Technical solutions are described for performing a live update of an operating system. An example method includes cloning an original root volume group associated with an operating system instance executing in a first logical partition to generate a cloned root volume group for booting a second logical partition. The method further includes applying the update to the cloned root volume group, and booting the second logical partition. The method further includes migrating an application instance, from the original root volume group to the second logical partition. The migration includes creating a network tunnel between the first and second logical partitions, and restarting the application instance on the second logical partition. The migration further includes forwarding data directed to the application instance on the first logical partition to the application instance on the second logical partition, and assigning a network address of the first logical partition to the second logical partition.

Abstract: Technical solutions are described for performing a live update of an operating system. An example method includes cloning an original root volume group associated with an operating system instance executing in a first logical partition to generate a cloned root volume group for booting a second logical partition. The method further includes applying the update to the cloned root volume group, and booting the second logical partition. The method further includes migrating an application instance, from the original root volume group to the second logical partition. The migration includes creating a network tunnel between the first and second logical partitions, and restarting the application instance on the second logical partition. The migration further includes forwarding data directed to the application instance on the first logical partition to the application instance on the second logical partition, and assigning a network address of the first logical partition to the second logical partition.

Abstract: A method for handling transmission control protocol (TCP) data between networked computer nodes during blackout periods associated with live kernel updating is provided. The method includes initiating a live kernel update on a first node, transmitting, prior to performing a network blocking procedure associated with the live kernel update, a zero window update to one or more peer nodes, generating a surrogate partition associated with the first node, copying network states from an original partition associated with the first node to the surrogate partition, restoring the network states on the surrogate partition, and transmitting another window update to the one or more peer nodes.

Abstract: A method for handling transmission control protocol (TCP) data between networked computer nodes during blackout periods associated with live kernel updating is provided. The method includes initiating a live kernel update on a first node, transmitting, prior to performing a network blocking procedure associated with the live kernel update, a zero window update to one or more peer nodes, generating a surrogate partition associated with the first node, copying network states from an original partition associated with the first node to the surrogate partition, restoring the network states on the surrogate partition, and transmitting another window update to the one or more peer nodes.

Abstract: A method for handling transmission control protocol (TCP) data between networked computer nodes during blackout periods associated with live kernel updating is provided. The method includes initiating a live kernel update on a first node, transmitting, prior to performing a network blocking procedure associated with the live kernel update, a zero window update to one or more peer nodes, generating a surrogate partition associated with the first node, copying network states from an original partition associated with the first node to the surrogate partition, restoring the network states on the surrogate partition, and transmitting another window update to the one or more peer nodes.

Abstract: A method for handling transmission control protocol (TCP) data between networked computer nodes during blackout periods associated with live kernel updating is provided. The method includes initiating a live kernel update on a first node, transmitting, prior to performing a network blocking procedure associated with the live kernel update, a zero window update to one or more peer nodes, generating a surrogate partition associated with the first node, copying network states from an original partition associated with the first node to the surrogate partition, restoring the network states on the surrogate partition, and transmitting another window update to the one or more peer nodes.

Abstract: A mechanism is provided to enhance the scalability of network caching capabilities. All network client applications running on a partition in a virtualized environment are configured to query information from a single virtual input/output server (VIOS) network caching daemon. Thus, the illustrative embodiments provide a 1:n model where a VIOS partition has a network caching daemon, and each of the n partitions uses the network caching daemon of the VIOS partition. The mechanism of the illustrative embodiments only requires the system administrator to control one copy of the local files on the VIOS server. The system administrator does not need to monitor all of these local files on each individual partition. The system administrator consolidates the entries used by the different individual partitions into one single file on the VIOS server side.

Abstract: A method, system, and computer-usable medium for enhancing environment variable and process option invocation in a data processing system. In a preferred embodiment of the present invention, in response to receiving a request for a system startup, an operating system loads a centralized environment file. In response to receiving a request for a user login, the operating system searches for a user environment file. In response to determining that the user environment file conflicts with the centralized environment file, the operating system overrides the user environment file with settings from the centralized environment file.

Abstract: A mechanism is provided to enhance the scalability of network caching capabilities. All network client applications running on a partition in a virtualized environment are configured to query information from a single virtual input/output server (VIOS) network caching daemon. Thus, the illustrative embodiments provide a 1:n model where a VIOS partition has a network caching daemon, and each of the n partitions uses the network caching daemon of the VIOS partition. The mechanism of the illustrative embodiments only requires the system administrator to control one copy of the local files on the VIOS server. The system administrator does not need to monitor all of these local files on each individual partition. The system administrator consolidates the entries used by the different individual partitions into one single file on the VIOS server side.

Abstract: A method, system, and computer-usable medium for enhancing environment variable and process option invocation in a data processing system. In a preferred embodiment of the present invention, in response to receiving a request for a system startup, an operating system loads a centralized environment file. In response to receiving a request for a user login, the operating system searches for a user environment file. In response to determining that the user environment file conflicts with the centralized environment file, the operating system overrides the user environment file with settings from the centralized environment file.