摘要:
To dynamically update an operating system, a new factory object may have one or more new and/or updated object instances. A corresponding old factory object is then located and its version is checked for compatibility. A dynamic update procedure is then executed, which includes (a) changing a factory reference pointer within the operating system from the old factory object to the new factory object. For the case of updated object instances, (b) hot swapping each old object instance for its corresponding updated object instance, and (c) removing the old factory object. This may be performed for multiple updated object instances in the new factory object, preferably each separately. For the case of new object instances, they are created by the new factory and pointers established to invoke them. A single factory object may include multiple updated objects from a class, and/or new object instances from different classes, and the update may be performed without the need to reboot the operating system.
摘要:
A system, method and computer program product for enhancing a real-time operating system (RTOS) with functionality normally associated with a general purpose operating system (GPOS). A hypervisor that is adapted to perform a real-time scheduling function supports concurrent execution of an RTOS and a GPOS on a system of shared hardware resources. The RTOS or its applications can utilize services provided by the GPOS. Such services may include one or more of file system organization, network communication, network management, database management, security, user-interface support and others. To enhance operational robustness and security, the hypervisor can be placed in read-only storage while maintaining the ability to update scheduling mechanisms. A programmable policy manager that is maintained in read-write storage can be used to dictate scheduling policy changes to the hypervisor as required to accommodate current needs.
摘要:
Systems, especially operating systems, are becoming more complex to the point where maintaining them by humans is becoming nearly impossible. Many corporations have recognized this trend and have begun investing in autonomic technology. Autonomic technology allows a piece of software to monitor, diagnose, and repair itself. This can be used for improved performance, reliability, maintainability, security, etc. Disclosed herein is a mechanism to allow operating systems to hot swap a piece of operating system code, while continuing to offer to the user the service which that code is providing. This can be used, for examples, to increase the performance of an application or to fix a detected security hole live without bringing the machine down. Some autonomic ability will be mandatory in next generation operating system for without it they will collapse under their own complexity. The invention offers a key component of being able to achieve autonomic computing.
摘要:
Real world energy usage can be reduced using a virtual environment. A virtual universe energy conservation system (“system”) can determine comprehensive energy usage at a physical site where a client accessing a virtual universe is located. The system can determine that the comprehensive energy usage at the physical site exceeds an energy usage threshold. The system can also notify a virtual universe user account associated with the client that the comprehensive energy usage at the physical site exceeds the energy usage threshold.
摘要:
A server computer system includes a keep-alive autonomic adjustment mechanism that monitors current operating conditions and dynamically adjusts the keep-alive specification to optimize the keep-alives for the current operating conditions. The keep-alive autonomic adjustment mechanism monitors the total number of clients, and the average number of requests per client. The value of a keep-alive specification that determines how log to keep a connection open may be dynamically and autonomically adjusted by the keep-alive autonomic adjustment mechanism according to the monitored current operating conditions. The keep-alive autonomic adjustment mechanism may also include the ability to autonomically enable and disable the keep-alives. In this manner the performance of the server may be tuned to optimize the effect of using keep-alives according to current operating conditions.
摘要:
A method, system, and computer program product for optimizing “Hypertext Preprocessor” (PHP) processes by identifying the PHP pages which are active on a server and forwarding requests for specific pages to a processor which has recently processed that page. A request processing optimization (RPO) utility assigns an initial request received at the server for a PHP page based on a number of factors which may include a relative usage level of a processor within a pool of available processors on a server. The RPO utility assigns a request to additional processors based on: (1) a threshold frequency of page requests; and (2) a resource intensive factor of a page request measured by average response time of the page request. The assignment of PHP pages to a particular processor(s) enhances cache performance since the requisite code for a specific PHP page is loaded into the processor's cache.
摘要:
A method, apparatus, system, and signal-bearing medium that, in an embodiment, calculate the average number of servers that executed an application in a previous time period, decide whether the current number of servers that execute the application is less than the average number of servers, and, if so, power on the average number of servers. The application is then distributed across the average number of servers. In an embodiment, the server is powered on by increasing the clock speed of the processors associated with the servers. In an embodiment, a determination is periodically made whether the response time of the application is greater than a threshold, and, if so, the servers are powered on and the application is distributed across the servers. In an embodiment, a determination is periodically made whether the response time of the application is less than a threshold, and, if so, servers are powered off and the application is distributed across the remaining servers.
摘要:
A system, method and computer program product for monitoring availability of end user devices needed for performing tasks. The system comprises a first network including one or more devices associated with an end user, at least one device adapted for communicating with a service provider over a second network, the service provider providing network-based services in the system. The system includes a memory storage device for maintaining information of tasks associated with an end user, the information including recommended end-user devices adapted to perform the tasks, the information being accessible to at least one end-user device. At least one end-user device detects non-availability or performance deficiencies of any end-user device required in performing end-user tasks, and communicates with the service provider for invoking network-based services to facilitate correcting non-availability of any end-user device. Such a system, method and computer program product enables students to receive these reminders and alerts, to order the necessary upgrades from suppliers via web services, and to monitor delivery from a single user interface provided on one of their devices.
摘要:
A method, apparatus, system, and signal-bearing medium that, in an embodiment, determine that a second e-mail is associated with a first e-mail and that one of the recipients of the first e-mail was a blind-copy recipient, and, in response, send the second e-mail to the blind-copy recipient of the first e-mail. In various embodiments, the second e-mail may be a reply to or a forward of the first e-mail. In an embodiment, the second e-mail has an encrypted portion, which includes an identifications of the blind-copy recipient, the sender of the first e-mail, and the other recipients of the first e-mail. The blind-copy recipient of the first e-mail is not identified in the first e-mail to the other recipients of the first e-mail. In this way, blind-copy recipients of e-mails may be notified of further associated e-mails.
摘要:
The present invention provides a method, system, and computer program product for caching dynamically generated queries such as SQL (Structured Query Language) statements. A method in accordance with an embodiment of the present invention comprises: providing a partial update query for updating at least one column in a table stored in a database; generating a key using a number representative of an update status of each column in the table; and determining if a prepared statement corresponding to the partial update query is located in a prepared statement cache using the key.