Abstract:
A storage system, such as a file server, receives a request to perform a write operation that affects a data block. In response, the storage system writes to a storage device the data block together with context information which uniquely identifies the write operation with respect to the data block. When the data block is subsequently read from the storage device together with the context information, the context information that was read with the data block is used to determine whether a previous write of the data block was lost.
Abstract:
A communication application displays a modality view that may be one of a collaboration, a gallery, or a messaging view on a conversation canvas. The application may display an initial view according a modality selection by the user. A user is enabled to select a next view from the set by providing a user action such as a tap, swipe action, etc. The application dynamically generates the next modality view according to the initial view. Common participants and common contexts are used to configure the next view. Subsequent to configuration, the application displays the next modality view on the conversation canvas by transitioning from the initial view. The application retains session information from the initial view to restore the initial view session if the user selects to return to the initial view.
Abstract:
An encoding manager facilitates robust single-pass variable bit rate video encoding of a video sequence. Before encoding the video sequence, the encoding manager determines the size of a buffer to use for keeping track of over/under used bits generated during encoding. The encoding manager uses the target bit rate for the video sequence and the length of the video sequence to determine the size of the buffer. After allocating bits to a frame of the sequence, the encoding manager determines the quant to use to encode that frame. The determination of a quant to use to encode a frame is informed by the fullness of the buffer. The encoding manager adjusts the quant to use (and thus the aggressiveness of its encoding) in response to the amount of overflow generated thus far by the encoding of the video sequence.
Abstract:
A system for and method of coordinating actions of components between userspace and kernel are described. The system comprises a processor; zero or more hardware components coupled with the processor; and a memory coupled with the processor and comprising a set of processor-executable instructions. The instructions comprise a component handling state machine responsive to at least one of a kernel component or a userspace component; and at least one component interface thread in communication with the component handling state machine and configured to interact with at least one of the zero of more hardware components responsive to a signal from the component handling state machine.
Abstract:
A system and method are provided to manage storage space. The method comprises detecting a free storage space threshold condition for a storage volume and automatically applying a space management technique to achieve a free storage space threshold condition. Space management techniques comprise deleting selected backup data (e.g., persistent consistency point images) and automatically increasing the size of the storage volume.
Abstract:
A system and method for detecting buffer leaks in a files system utilizing consistency points is provided. Upon receipt of a write operation, a buffer check control structure is written to a raw data buffer. The buffer check control structure comprises a set of magic numbers and a consistency point counter identifying the current CP. At write allocation time, the buffer check control structure is examined to determine that the buffer is being committed to disk during the correct CP.
Abstract:
A system and method for quickly and efficiently determining the number of overwritten blocks between two data containers served by a storage system is provided. A novel vbnspace namespace is provided that is “parallel” to the file system (the “active” file system) and tracks location information (i.e., indirect block pointers) of level 0 data blocks within each data container, e.g., the active file system or a PCPI. The vbnspace namespace effectively eliminates the conventional level 0 data blocks from a storage viewpoint to thereby reduce the quantity of information needed to determine the number of overwritten blocks between the data containers.
Abstract:
The invention provides a method and apparatus for coding information that is specifically adapted for smaller presentation formats, such as in a hand held video player. The invention addresses, inter alia, reducing the complexity of video decoding, implementation of an MP3 decoder using fixed point arithmetic, fast YcbCr to RGB conversion, encapsulation of a video stream and an MP3 audio stream into an AVI file, storing menu navigation and DVD subpicture information on a memory card, synchronization of audio and video streams, encryption of keys that are used for decryption of multimedia data, and very user interface (UI) adaptations for a hand held video player that implements the improved coding invention herein disclosed.
Abstract:
A method and system mirror flexible volumes in a circular or bi-directional configuration, without creating a deadlock. A source filer maintains a number of log files on a destination filer, where the number of log files is greater than or equal to the number of cache flush operations the primary filer performs between cache flush operations on the destination filer. The source filer can create the log files in advance. Alternatively or in addition, the source filer can create the log files as needed, i.e., the source filer can create a log file when the source filer flushes its cache. Once the destination filer flushes its cache, the log files created prior to the destination filer cache flush can be deallocated or reused.
Abstract:
A system and method are provided to manage storage space. The method comprises detecting a free storage space threshold condition for a storage volume and automatically applying a space management technique to achieve a free storage space threshold condition. Space management techniques comprise deleting selected backup data (e.g., persistent consistency point images) and automatically increasing the size of the storage volume.