Abstract:
The invention relates to a method or a device for obtaining a using-frequency of a specified application program. The method comprises: obtaining an installing route of the specified application program, according to a system-registering information list; calling an API to monitor operation of the specified application program; recording a last start-up time and the installing route of the specified application program; obtaining the last start-up time of the specified application program based on the installing route as an index; comparing the last start-up time and a current time, to determine the using-frequency of the specified application program. The present invention can intercept the process start functions of the Operation System, to easily and efficiently obtain the using-frequency of the specified application program, easily manage the application program installed in the computer, and provide the base for optimizing the Operation System of the computer.
Abstract:
A first computing device is provided for rolling back a computing environment. The computing device includes processors configured to acquire a stream containing entries including snapshot entries, memory entries, and input/output entries wherein each entry includes information and is associated with a timestamp. The processors are further configured to receive a snapshot entry associated with a first timestamp, revert to a memory state using information provided in at least one memory entry associated with a timestamp after the first timestamp, and re-execute a previously executed process, wherein the re-execution of the process is started using the first timestamp, information from the received snapshot entry, and information for input/output operations corresponding to the input/output entries associated with timestamps after the first timestamp.
Abstract:
A method of analysing streams of metric data from a plurality of data processing sources (2) in a parallel processing system (1), using a computer (6). Each stream includes time stamped data associated with the respective data processing source in respect of a given metric which is sampled at intervals. For each stream of data, a start time and an end time are identified. A normalized start time and a normalized end time are determined across all streams. Sampling points are specified between the normalized start time and the normalized end time. For each stream of data, the data is re-sampled at the specified sampling points. For each sampling point, the re-sampled data across all the streams of data is processed to determine a statistical derivative of the data. A report is displayed which represents the values of the statistical derivative as a function of time. The process may be applied to various different metrics, and the results displayed at the same time, on a common time axis.
Abstract:
A method and system for building a point-in-time snapshot of an eventually-consistent data store. The data store includes key-value pairs stored on a plurality of storage nodes. In one embodiment, the data store is implemented as an Apache® Cassandra database running in the "cloud." The data store includes a journaling mechanism that stores journals (i.e., inconsistent snapshots) of the data store on each node at various intervals. In Cassandra, these snapshots are sorted string tables that may be copied to a back-up storage location. A cluster of processing nodes may retrieve and resolve the inconsistent snapshots to generate a point-in-time snapshot of the data store corresponding to a lagging consistency point. In addition, the point-in-time snapshot may be updated as any new inconsistent snapshots are generated by the data store such that the lagging consistency point associated with the updated point-in-time snapshot is more recent.
Abstract:
A method (100) is disclosed for determining the behaviour of an integrated circuit comprising a plurality of resources and being configured to execute a plurality of operations that each require temporary allocation and deallocation of at least a subset of the plurality of resources during said execution. The method comprises the steps of monitoring (130) the execution of at least some of the plurality of operations during an execution run of the IC, capturing (140) events indicating the (de)allocation of resources during said execution, capturing events (150) indicating an operational relationship between allocated resources during said execution, assigning (140, 150) a time stamp to each event; and making (160) the captured events available for visualization. This facilitates the visualization of events that are interrelated in terms of the operation to which they are assigned at a given time instant. This visualization may be realized in the form of a connectivity graph, for which another method (200) is disclosed.
Abstract:
A system, method and computer program product are provided for generating backup sets for a specific point in time from backup data stored in a backup storage device. A backup set, in accordance with an illustrative embodiment, is a collection of the files and data that would have been the most recently backed-up version of a computer's files and data at the particular point in time if the backup set had been created at that point in time. In order to generate the backup set, versions of data objects are identified in the backup storage system that have backup timestamps equal to or prior to the designated point in time and that have deactivation times that are after the designated point in time. In addition, a mechanism for deleting versions of data objects based on a retention time and an inactive version limit is provided.
Abstract:
An apparatus, system, and method are disclosed for continuously protecting data. A mirror module mirrors a primary record set to a base record set. A log module accumulates each record change to the primary record set in a log. A change selection module selects a record change from the log. A change application module applies the selected record change to the base record set to form a recovered record set.
Abstract:
Restoring a mass storage device, including the corresponding data blocks stored thereon, to a state in which it existed at a prior instant in time to minimize the data loss caused by data blocks becoming corrupt or lost. After a mirrored or backup copy has been made, data blocks that are to be overwritten in response to a write request are stored in a preservation memory prior to being overwritten. The data blocks stored in the preservation memory are time-stamped to designate the chronological order by which the data blocks were overwritten. If data becomes corrupted, the data blocks of the preservation memory are applied to the corrupted data in reverse chronological order until such time that a valid, non-corrupted set of data is obtained. In this manner, data more recent than that associated with the full mirrored or backup copy can be reconstructed.