Sun Microsystems, Inc.

Oracle America, Inc.

Scott Michael Carter

Yong Colin Zou

Wesley M Shao

David L Isaman

Shrikant Deshpande

Roman Zajcew

David Nielsen

Richard C Murphy

Govinda Tatti

Boman Irani

Mario G Ornelas

Arthur Salazar

A device list is created for an operating system and/or a virtualized operating system. A bus node is created for each bus. Interface nodes are created as child nodes of the respective bus and a status indicator indicates whether a device connected to the interface is accessible. A device node is created for the device connected to the interface. Virtualized interface nodes are created as child nodes of the device node for each virtual device included in the device and a status indicator indicates whether the respective virtual device is accessible. Then, devices and/or virtual devices may be added and/or removed utilizing the list. After a device and/or virtualized device has been removed for one operating system and/or virtualized operating system, it may then be added to another. In this way, devices and/or virtualized devices can be virtually hot plugged without physically connecting and/or disconnecting devices.

Virtual hot plugging of devices and virtual devices

A method and mechanism for managing operating system instances in a computing system. A computing system is configured to enable users to model and manage operating system instances. One or more defined operating system instances may be created and stored for future use. Each of the defined operating system instances may include a description of required resources. In addition, the definition of desired and/or optimal resources may be specified. In response to an attempt to realize an operating system instance, a determination is made as to whether resources allocated for the operating system instance are adequate. If the allocated resources are inadequate, further resources may be allocated. In addition, a determination may be made as to whether a standby mode is indicated for the operating system instance. If a standby mode is indicated, the operating system instance may be realized but not booted.

Modeling operating system instances

A system and method for predicting whether a dynamic reconfiguration of a resource of a resource domain would be successful, prior to attempting the reconfiguration. A resource domain includes one or more computer resources (e.g., physical, logical and pseudo devices) and a graph management agent configured to maintain a graph representing the resources and dependencies between resources. Vertices of the graph represent resources; edges represent dependencies. A resource domain may also include a set of policies or constraints regarding resources and reconfigurations of resources. An illustrative constraint may specify that a particular resource (e.g., a multi-pathed logical device) must have a minimal number of paths (e.g., two). The graph agent identifies the effect the dynamic reconfiguration operation would have upon the resources and dependencies, and determines whether any constraints would be violated. If no constraints would be violated, the graph management agent may indicate that the reconfiguration would succeed.

System and method for dynamic resource configuration using a dependency graph

Growing community of inventors

San Diego, CA, United States of America

Scott Michael Carter