Hewlett-packard Development Company, L.p.

Emc IP Holding Company LLC

Harshadrai Parekh

Salil Dangi

Bhimsen Bhanjois

Douglas Vincent Larson

Srisailendra Yallapragada

Edward J Sharpe

Vasudevan Sangili

Swapneel Kekre

Krithika Subramanian

Colin Edward Honess

According to one embodiment, a request is received to replicate a plurality of ranges of a source file from a source storage system to a target storage system, where the request specifies a first range of the source file and a second range of the source file. A first replication stream and a second replication stream of a replication session are established with the target storage system. First data of the first range and the second data of the second range from the source file are directly read from the source file, without creating separate files for storing the first data and the second data. The first data and second data are transmitted to the target storage system via the first stream and the second stream respectively in parallel.

Multi-streaming with synthetic replication

In general, embodiments of the invention relate to methods and systems for replicating data, which is stored in a source system, in a target system. More specifically, embodiments of the invention enable parallel transmission and verification of portions of the data. Once the portions of the data have been verified, embodiments of the invention combine the verified portions of the data to obtain the final combined data. The combined data is then verified.

Method and system to verify integrity of a portion of replicated data

Described is a system for identifying data that may differ between files used as part of a replication process. The system may determine a type of segmentation used for segmenting data such as a variable size segmentation or a fixed size segmentation is used. Based on the segmentation of a file, the system may identify segments that may be modified. For example, the system may identify only the particular modified segments within a boundary when a fixed size segmentation is used identify all of the segments within a boundary as modified when a variable segmentation is used. Accordingly, depending on the scenario, the system may determine an efficient mechanism for identifying data to send to a target storage as part of a replication process.

Adaptive replication for segmentation anchoring type

An embodiment of the invention provides an apparatus and a method for direct switching of software threads. The apparatus and method include performing acts including: issuing a wakeup call from a first thread to a second thread in a sleep state; removing the second thread from the sleep state; switching out the first thread from the resource; switching in the second thread to the resource; and running the second thread on the resource.

Direct switching of software threads by selectively bypassing run queue based on selection criteria

Systems, methods, and devices, including computer executable instructions for transferring threads are described. The method comprises determining an idle processor by checking a handoff state of the processor prior to placing an identified runnable thread in a run queue of an idle processor. The method also comprises transferring the runnable thread to a determined idle processor by setting the handoff state of the processor to a handle of the runnable thread.

Thread hand off

Apparatus and methods are provided for transferring interrupts. One embodiment of a computing device includes a first processor, a memory in communication with the first processor, and computer executable instructions stored in memory and executable on the first processor. The computer executable instructions are provided to select an interrupt, that has been waiting to be processed, for transfer from the first processor, check a number of other processors to select a second processor that has a short wait time for processing the interrupt, and transfer the interrupt from the first processor to the second processor.

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San Jose, CA, United States of America

Harshadrai Parekh