摘要:
The present invention provides predictable scheduling of programs using a repeating precomputed schedule. In a preferred embodiment, a scheduler accesses an activity scheduling graph. The activity scheduling graph is comprised of nodes each representing a recurring execution interval, and has one root, one or more leaves, and at least one path from the root to each leaf. Each node is on at least one path from the root to a leaf, and the number of times the execution interval represented by each node occurs during the traversal of the graph is equal to the number of paths from the root to a leaf that the node is on. Each node has associated with it an execution interval length, and is adapted to being dedicated to executing the threads of a single activity. The scheduler first selects a current node within the accessed scheduling graph. When the processor becomes available to execute threads, the scheduler advances from the current node to a new current node in accordance with a root-to-leaf traversal of the scheduling graph. After advancing to the new current node, the scheduler executes one or more threads of the activity to which the new current node is dedicated for the execution interval length associated with the new current node. In a further preferred embodiment, the scheduler allocates specific iterations through specific nodes to satisfy the constraints submitted by threads.
摘要:
Distributed execution of commands and scripts may comprise a script execution manager having access to a library of executable objects comprising at least one or more of commands or scripts or combination of commands and scripts. A script execution console may be operable to present a graphical user interface for selecting an executable object from the library to execute and for selecting one or more managed computers, on which to execute the selected executable object. The script execution console may be further operable to present a dynamically updated collation of results from execution of the selected executable object. One or more script execution agents may be operable to run on the selected respective one or more managed computers and further operable to communicate with the script execution manager.
摘要:
Transferring content between one or more input streams and one or more output streams via an application running on a host system. A kernel-level service is provided which is adapted to perform application-specific processing and which attends to transfer of content from at least one input stream to at least one output stream. With the kernel-level service, an operation is performed for the collection of at least one input stream and at least one output stream via: performing application-specific processing; and attending to the transfer of content from at least one input stream to at least one output stream.
摘要:
A system and method for maintaining consistency in a system where multiple copies of an object may exist is provided for maintaining consistent copies. Consistency is maintained using a plurality of consistency policies in which at least one consistency policy results in different performance than a second consistency policy. A consistency policy is selected from the plurality consistency policies for each object to improve system performance.
摘要:
In a system having a plurality of caches, a method for maintaining cached objects includes storing an object in a plurality of caches. In response to a request to update the object, a future invalidation time is determined when the object should be invalidated in caches currently storing the object. Updating of the object is delayed until the invalidation time has passed.
摘要:
A method, which may be implemented by a program storage device readable by machine, tangibly embodying a program of instructions executable by the machine to perform method steps for satisfying requests between a client and a server including the steps of providing a first entity with a directory of information about contents of a cache of a second entity, the first entity for receiving a request from a client, determining whether the directory of information indicates that the request is satisfied by the cache of the second entity by querying the directory of information on the first entity, sending the request to the second entity, if the directory indicates that the request is satisfied by the cache of the second entity, and otherwise, sending the request to be satisfied by another entity. A system is also included.
摘要:
The present invention provides predictable scheduling of programs using a repeating precomputed schedule. In a preferred embodiment, a scheduler accesses an activity scheduling graph. The activity scheduling graph is comprised of nodes each representing a recurring execution interval, and has one root, one or more leaves, and at least one path from the root to each leaf. Each node is on at least one path from the root to a leaf, and the number of times the execution interval represented by each node occurs during the traversal of the graph is equal to the number of paths from the root to a leaf that the node is on. Each node has associated with it an execution interval length, and is adapted to being dedicated to executing the threads of a single activity. The scheduler first selects a current node within the accessed scheduling graph. When the processor becomes available to execute threads, the scheduler advances from the current node to a new current node in accordance with a root-to-leaf traversal of the scheduling graph. After advancing to the new current node, the scheduler executes one or more threads of the activity to which the new current node is dedicated for the execution interval length associated with the new current node. In a further preferred embodiment, the scheduler allocates specific iterations through specific nodes to satisfy the constraints submitted by threads.