Abstract: Technologies are disclosed for determining network-accessible content changes based on computed models and providing a long term forecast of user interaction at a network accessible site based upon a short term experiment at the site. A forecast model for a period of time is generated based upon historical data of user interactions at the site. An experiment is run for a short term at the site based upon a potential change at the site. Based upon data obtained during the experiment, scores are generated for a control group (no change) and a treatment group (potential change) and compared. If there are statistically significant differences between the control group and the treatment group scores, the long term forecast may be used to forecast what the long term impact of the experiment would be based upon the short term experiment.

Abstract: The present invention provides a method and apparatus for error recovery in a system. The apparatus comprises a directory cache adapted to store at least one entry and a control unit. The control unit is adapted to determine if at least one uncorrectable error exists in the directory cache and to place the directory cache offline in response to determining that the error is uncorrectable. The method comprises detecting an error in data stored in a storage device in the system, and determining if the detected error is correctable. The method further comprises making at least a portion of the storage device unavailable to one or more resources in the system in response to determining that the error is uncorrectable.

Abstract: A method and apparatus for providing error isolation in a multi-domain computer system. The system includes a plurality of system resources allocated to form at least a first and second domain. The system resources of the first domain perform a set of transactions independent from a set of transactions performed by the system resources of the second domain. The system further comprises at least one interface for coupling one system resource from the first domain and one system resource from the second domain. The at least one interface tracks the set of transactions performed by the one system resource of the first domain and the one system resource of the second domain independently from one another.

Abstract: The present invention provides a method and apparatus for error recovery in a system. The apparatus comprises a directory cache adapted to store at least one entry and a control unit. The control unit is adapted to determine if at least one uncorrectable error exists in the directory cache and to place the directory cache offline in response to determining that the error is uncorrectable. The method comprises detecting an error in data stored in a storage device in the system, and determining if the detected error is correctable. The method further comprises making at least a portion of the storage device unavailable to one or more resources in the system in response to determining that the error is uncorrectable.

Abstract: A method and apparatus for providing error isolation in a multi-domain computer system. The system includes a plurality of system resources allocated to form at least a first and second domain. The system resources of the first domain perform a set of transactions independent from a set of transactions performed by the system resources of the second domain. The system further comprises at least one interface for coupling one system resource from the first domain and one system resource from the second domain. The at least one interface tracks the set of transactions performed by the one system resource of the first domain and the one system resource of the second domain independently from one another.