Abstract: Statistics for temporary tables are used in optimizing the execution of a database request. A first temporary table is created using data from a data source as the result of performing an operation while executing the request. A subset of the demographics of the data source is saved in a session level memory as the demographics of the first temporary table. The saved demographics are used in optimizing the execution of the portion of the request involving the first temporary table.
Abstract: A technique is described for delivering contextual information to end users of a data network which includes at least one client system associated with an end user. According to a specific embodiment, the technique of the present invention provides a contextual-based platform for delivering to an end user in real-time proactive, personalized, contextual information relating to web page content currently being displayed to the user.
Abstract: A data storage device stores therein files as mirror source or mirror destination, and has ownership rights to files stored as mirror source. Having received a number of read/write requests to a file stored as mirror destination from a data processing device, the data storage device obtains an ownership right to the file, and updates ownership status of the file from mirror destination to mirror source. Thus, response time to the read/write requests to the file can be improved. After that, if the data processing device frequently requests another data storage device for access to the file, an ownership right to the file is transferred to the other data storage device, and accordingly, the ownership status of the file is updated.
Abstract: A data movement system is described herein that allows an administrator to cause data to be moved from one server to another with little or no service outage and in an amount of time that is proportional to the overall size of the data being moved rather than the way the data is organized. The system uses virtual hard drive technology to encapsulate the file system of a share within a single file of a host file system to allow snapshots taken at the volume level to avoid data unrelated to the share and to allow block level copy operations. The system also uses a motion process that includes steadily converging snapshots to copy data without interrupting access to the source location. The system provides tombstone notifications to clients that attempt to access the data at the source location after the data has moved.