摘要:
Aspects of the invention provide a solution for determining a storage location for a data item from among a set of persistent storage locations having varying access speeds. Each data item is associated with a score that is based on the frequency with which the data item has been accessed, as well as possible other factors such as open time and/or close time of the data item, the amount of data in the data item, the period from the last time the data item was closed to the next time that the data item is opened and/or the total amount of data in the data item. Data items with high scores relative to other data items are assigned to faster access storage location while data items with lower scores are assigned to slower access storage locations.
摘要:
Aspects of the invention provide a solution for determining a storage location for a data item from among a set of persistent storage locations having varying access speeds. Each data item is associated with a score that is based on the frequency with which the data item has been accessed, as well as possible other factors such as open time and/or close time of the data item, the amount of data in the data item, the period from the last time the data item was closed to the next time that the data item is opened and/or the total amount of data in the data item. Data items with high scores relative to other data items are assigned to faster access storage location while data items with lower scores are assigned to slower access storage locations.
摘要:
A method for enabling file system tagging by an application includes creating tag associations for the file system by associating a tag with a file object. The association includes allocating a file association structure (FAS) in the storage device, which FAS has attributes including a pointer to a file handle of the file object and a list of names of tags associated with the file object. Associating the tag with a file object also includes allocating a tag structure for each tag in the file system. The tag structure includes a tag name and file associations for the tag. In response to a request for a read directory operation, the method includes retrieving the tag associations to identify the file object, dynamically assembling a directory entry structure that includes a hierarchical view of tags identified from the tag associations and corresponding file object, and returning the directory entry structure to the application.
摘要:
A method for enabling file system tagging by an application includes creating tag associations for the file system by associating a tag with a file object. The association includes allocating a file association structure (FAS) in the storage device, which FAS has attributes including a pointer to a file handle of the file object and a list of names of tags associated with the file object. Associating the tag with a file object also includes allocating a tag structure for each tag in the file system. The tag structure includes a tag name and file associations for the tag. In response to a request for a read directory operation, the method includes retrieving the tag associations to identify the file object, dynamically assembling a directory entry structure that includes a hierarchical view of tags identified from the tag associations and corresponding file object, and returning the directory entry structure to the application.
摘要:
A method and computer system are provided for distributing a plurality of data portions from a server system to one or more client systems. The method includes receiving one or more first requests at the server, each first request being submitted by a client system and including a portion identifier, wherein a portion identifier is assigned to each data portion; in response to receiving the first request(s), transmitting a list of chunk identifiers to the requesting client systems, wherein the list of chunk identifiers specifies the data chunks whose meta-data includes the portion identifier contained in the first request; and transmitting some or all data chunks of a data chunk library to each of the requesting client systems. At the requesting client system, the client specifically selects the data chunks of the transmitted data chunks which are specified by the received list of chunk identifiers.
摘要:
Efficiently determining identical pieces of memory within a computer memory area, which is occupied by a virtual machine manager hosting multiple guests and the computer memory area being logically separated into memory pages of a unique size. Each guest is inspected for its structural characteristics by the virtual machine manager. The structural characteristics of each guest are compared by the virtual machine manager, wherein memory regions of guests having a similar structure are identified; and the identical memory pages are identified by the virtual machine manager by comparing hash values of memory pages located within memory regions of guests having a similar structure, wherein identical memory pages are determined by comparing hash values calculated over the contents of the memory pages.
摘要:
A method is provided for placing a virtual machine on a target virtual machine manager out of multiple virtual machine managers. System management software is connected to the virtual machine managers and selects the target virtual machine manager for placing the virtual machine. The method includes: the system management software creating a memory profile for all virtual machines hosted on the multiple virtual machine managers, the system management software evaluating probabilities for samepage mapping of the virtual machine to be placed on the multiple virtual machine managers based on the memory profiles of the virtual machines, the system management software selecting under consideration of the probabilities for samepage mapping a most appropriate virtual machine manager as the target virtual machine manager, and the system management software placing the virtual machine on the target virtual machine manager.
摘要:
Efficiently determining identical pieces of memory within a computer memory area, which is occupied by a virtual machine manager hosting multiple guests and the computer memory area being logically separated into memory pages of a unique size. Each guest is inspected for its structural characteristics by the virtual machine manager. The structural characteristics of each guest are compared by the virtual machine manager, wherein memory regions of guests having a similar structure are identified; and the identical memory pages are identified by the virtual machine manager by comparing hash values of memory pages located within memory regions of guests having a similar structure, wherein identical memory pages are determined by comparing hash values calculated over the contents of the memory pages.
摘要:
A computerized method, computer system, and a computer program product for processing an execution request within different computing environments. Execution requests and generated reference information are forwarded to the different computing environments, where the requests are processed using the reference information. Results of the processed execution requests are collected from the different computing environments. The results are compared to find any discrepancy, possibly giving indication of a software or hardware error.
摘要:
Operating a node cluster system with a plurality of nodes in a network, wherein the cluster system appears to be a single node with only one specific network address to its network environment. Providing a shared socket database for linking network connection port identifications of a common set of network connection port identifications to the individual nodes, assigning a master function to one of the nodes, sending incoming traffic to all nodes of the cluster system wherein each node verifies its responsibility for this traffic individually, exclusive assignment of a network connection port to the responsible node for the duration of a connection of the corresponding application process by means of the corresponding network connection port identification and the link established by the shared socket database and processing of the traffic by the responsible node or otherwise by the node having the master function.