Abstract: Methods, systems, and computer-readable media for deploying an update to nodes propagated throughout a data center are provided. Launching new upgrade to hosting environment residing on the nodes typically invokes a mechanism (e.g., fabric controller) to form a group of nodes that are independent of one another with respect to upgrade domains, which are assigned to tenants (e.g., program components of service applications running within the data center) presently hosted by the nodes. The constraints of the update domains are articulated by service level agreements established for the service applications, respectively. Forming the group involves identifying independent nodes for membership, where no two members of the group host analogous tenants (belonging to a common service application) that are assigned to distinct update domains. However, it is acceptable to join to the group those nodes hosting analogous tenants that are each assigned to the same update domain.

Abstract: Methods, systems, and computer-readable media for deploying an update to nodes propagated throughout a data center are provided. Launching new upgrade to hosting environment residing on the nodes typically invokes a mechanism (e.g., fabric controller) to form a group of nodes that are independent of one another with respect to upgrade domains, which are assigned to tenants (e.g., program components of service applications running within the data center) presently hosted by the nodes. The constraints of the update domains are articulated by service level agreements established for the service applications, respectively. Forming the group involves identifying independent nodes for membership, where no two members of the group host analogous tenants (belonging to a common service application) that are assigned to distinct update domains. However, it is acceptable to join to the group those nodes hosting analogous tenants that are each assigned to the same update domain.

Abstract: Provided is a technique to automatically detect and recover a computer system after a failed attempt to read a partition, for example, a failed attempt to boot a target operating system, caused by corrupt disk metadata, such as a corrupt partition table metadata or a corrupt boot sector metadata.

Abstract: Techniques for improving a troubleshooting experience by providing a common troubleshooting framework. Such a framework may enable use of common elements between troubleshooters and lead to similarities between troubleshooting packages, which may improve the user experience. Further, a framework may reduce the amount of knowledge and time necessary to create troubleshooting packages, and thus encourage increased development of these troubleshooting packages. In some implementations of the framework, a troubleshooting package may be implemented in a declarative manner that outlines/describes the problems it solves and the potential solutions to those problems. The declarative troubleshooting packages may then be provided to the troubleshooting framework and may provide direction to the framework, in that the framework may execute functions as directed by the troubleshooter.