206 results about "Data striping" patented technology

A solid-state disk (SSD) has a smart storage switch with a smart storage transaction manager that re-orders host commands for accessing downstream single-chip flash-memory devices. Each single-chip flash-memory device has a lower-level controller that converts logical block addresses (LBA) to physical block addresses (PBA) that access flash memory blocks in the single-chip flash-memory device. Wear-leveling and bad block remapping are preformed by each single-chip flash-memory device, and at a higher level by a virtual storage processor in the smart storage switch. Virtual storage bridges between the smart storage transaction manager and the single-chip flash-memory devices bridge LBA transactions over LBA buses to the single-chip flash-memory devices. Data striping and interleaving among multiple channels of the single-chip flash-memory device is controlled at a high level by the smart storage transaction manager, while further interleaving and remapping may be performed within each single-chip flash-memory device.

A flash module has raw-NAND flash memory chips accessed over a physical-block address (PBA) bus by a NVM controller. The NVM controller is on the flash module or on a system board for a solid-state disk (SSD). The NVM controller converts logical block addresses (LBA) to physical block addresses (PBA). Data striping and interleaving among multiple channels of the flash modules is controlled at a high level by a smart storage transaction manager, while further interleaving and remapping within a channel may be performed by the NVM controllers. A SDRAM buffer is used by a smart storage switch to cache host data before writing to flash memory. A Q-R pointer table stores quotients and remainders of division of the host address. The remainder points to a location of the host data in the SDRAM. A command queue stores Q, R for host commands.

A flash module has raw-NAND flash memory chips accessed over a physical-block address (PBA) bus by a NVM controller. The NVM controller is on the flash module or on a system board for a solid-state disk (SSD). The NVM controller converts logical block addresses (LBA) to physical block addresses (PBA). Data striping and interleaving among multiple channels of the flash modules is controlled at a high level by a smart storage transaction manager, while further interleaving and remapping within a channel may be performed by the NVM controllers. A SDRAM buffer is used by a smart storage switch to cache host data before writing to flash memory. A Q-R pointer table stores quotients and remainders of division of the host address. The remainder points to a location of the host data in the SDRAM. A command queue stores Q, R for host commands.

A switching system for a data stream utilizing striping with a parity stripe, so if a fabric of the system fails, the data stream can still be reconstructed with the parity stripe. The system uses receive and transmit interfaces which implement space division, and fabrics which implement hybrid space/time division.

In a multinode data processing system in which nodes exchange information over a network or through a switch, a structure and mechanism are provided which enables data packets to be sent and received in any order. Normally, if in-order transmission and receipt are required, then transmission over a single path is essential to insure proper reassembly. However, the present mechanism avoids this necessity and permits Remote Direct Memory Access (RDMA) operations to be carried out simultaneously over multiple paths. This provides a data striping mode of operation in which data transfers can be carried out much faster since packets of single or multiple RDMA messages can be portioned and transferred over several paths simultaneously, thus providing the ability to utilize the full system bandwidth that is available.

An equalizer for a VSB receiver, which enables equalizations using segment synchronization information, has an extraction unit extracting the segment synchronization information included in the VSB broadcast signal, a storage unit storing the extracted segment synchronization information, and an equalization unit equalizing the VSB broadcast signal based on the segment synchronization information stored in the storage unit. The storage unit stores the segment synchronization information extracted from the extraction unit by field unit or by unit of N data segments within the field according to a channel state. More stable equalizations can be carried out in channel environment changes by storing segment synchronization information by the predetermined number of data segments and equalizing data within a corresponding data segment in a training mode while using the segment synchronization information every matching number of data segments.

A highly reliable data archival and retrieval method that enables fine grained control over data availability is implemented across a Quality of Service driven archival system, configured to fragment the data into data and parity chunks for storing onto the storage node. The technique employed by the archival system enables files to be read without having need to access any metadata, thereby tolerating complete loss of such metadata. Further, the Quality of Service driven system architecture improves upon the system performance and throughput by means of a storage node regeneration process which ensures balanced load on participating storage node during various storage, retrieval and regeneration operations.

A process for requesting information, the process including generating a plurality of range requests using a client having a plurality of network interfaces, the range requests each corresponding to a data range of a data resource, transmitting, from the client having the plurality of network interfaces, a plurality of range requests to a server via the plurality of network interfaces, receiving, at the client and from the server, a plurality of segments via the plurality of network interfaces such that each segment is received via a network interface which transmitted the corresponding range request, each segment including a portion of the data resource, and reassembling the data resource using the plurality of segments.

A method for streaming content striped in RAID 5 format from an array of disk drives to subscribers to minimize disruptive service from a disk drive failure. The method includes accessing content data on an extent-by-extent basis from a plurality of disk drives in an array and streams the content data to the subscribers on an extent-by-extent basis, sequentially, from the plurality of disk drives. Upon detection of an actual disk drive failure the method transitions to a stream regeneration mode of operation, which includes reading the content data substantially simultaneously from all extents in a parity group and regenerating a failed portion of the content data from a failed extent in the parity group corresponding to the failed disk drive. The content data in the parity group is streamed to the subscribers, extent-by-extent, immediately following the regenerating of the content data from the failed extent in the parity group.

A flash module has raw-NAND flash memory chips accessed over a physical-block address (PBA) bus by a NVM controller. The NVM controller is on the flash module or on a system board for a solid-state disk (SSD). The NVM controller converts logical block addresses (LBA) to physical block addresses (PBA). Data striping and interleaving among multiple channels of the flash modules is controlled at a high level by a smart storage transaction manager, while further interleaving and remapping within a channel may be performed by the NVM controllers. A SDRAM buffer is used by a smart storage switch to cache host data before writing to flash memory. A Q-R pointer table stores quotients and remainders of division of the host address. The remainder points to a location of the host data in the SDRAM. A command queue stores Q, R for host commands.

A method of data segmentation in a transmitter of a mobile communications system includes initiating alternate extension bit interpretation, a last data segment of a Service Data Unit exactly ending at an end of a Protocol Data Unit, no Length Indicator in the Protocol Data Unit indicating the end of the Service Data Unit, a length of a next Service Data Unit following the Service Data Unit exactly equaling to a length of a data field of a next Protocol Data Unit following the Protocol Data Unit, and setting a first extension bit of the next Protocol Data Unit to be a specified value for indicating that the next Protocol Data Unit comprises a complete Service Data Unit, which is not segmented, concatenated or padded, and indicating that a Service Data Unit exactly ended in the Protocol Data Unit.

Certain example embodiments relate to the concept of controlling the flow of data by providing an intelligent flow controller/manager, and a client-side component for the selection of a communication channel from a pool, and having these components communicate to regulate data flow through gateways to a broker- and/or other-type secondary stage. Data fragmentation and reassembly can be used to increase performance, e.g., through self-regulating behaviors. Advantageously, reliability is improved by enabling in-memory data persistence, rather than resorting to potentially performance-degrading use of disk storage. The delivery mechanism may be used to deliver data to multiple consumers, providing an end-to-end sender-to-consumer solution that self-regulates to optimize the data flow while still being reliable.

One exemplary method comprises a method for grouping a plurality of data elements of a dataset. The method includes clustering the dataset into a plurality of clusters with each of the plurality of clusters including at least one of the plurality of data elements. The method further includes iteratively classifying the plurality of clusters into a plurality of classes of like data elements.

An apparatus, program product and method stripe value data associated with each of a plurality of keyed data sets across a plurality of processes in a data process set and accessing a first keyed data set among the plurality of keyed data sets using at least one of the plurality of processes. Value data is striped by dividing a keyed data set among the plurality of keyed data sets across the plurality of processes in the data process set based on a striping strategy.

A data storage system configured for efficient mirroring of data between paired redundant controllers is provided. More particularly, in response to the receipt of customer data from a host for storage, a first controller segments the received customer data into one or more frames of data. In addition, the first controller determines or associates certain metadata for each frame of customer data, and inserts that metadata in the corresponding frame. The frames, including the metadata, are provided to a secondary controller. The secondary controller stores the customer data from a received frame in memory, and stores the corresponding metadata in another location of memory that is indexed to the location where the customer data was stored. The secondary controller may also associate a count value with each frame of data in order to distinguish the most recent frame of data should frames in memory have matching metadata.

The invention discloses an MP4 video on demand data stream transmission method, a client side and a video on demand system. The data stream transmission method comprises a first step that the client side sends a request to an index server to download index data according to a video playing request, wherein the index data is analysis data of file header information of a video file stored in the index server; a second step that the index server seizes the index data requested to download, and then pushes the index data to the client side segment by segment; a third step that the client side sends a request to a video server to download audio and video content data according to the acquired index data segments; and a fourth step that the video server pushes the audio and video content data requested to download to the client side segment by segment. When the video file is requested to play, segmented index data is downloaded from the index server, and then the video can be played, so that response speed for video on demand is improved.

A method for handling discarding of a sequence of service data units in a communications system is disclosed. The sequence of service data units includes at least a last discarded service data unit (SDU). When a protocol data unit (PDU) containing a length indicator of the last discarded SDU contains no new SDUs, the method includes creating a move receiving window super field (MRW SUFI), setting a N_LENGTH field of the MRW SUFI to 0, setting a last sequence number move receiving window field (SN_MRW_LENGTH) to a sum of one plus a sequence number (SN) of the PDU containing the length indicator of the last discarded SDU, and issuing the MRW SUFI.

The invention discloses a service node selecting, updating and code rate adaptation method in a distributed DASH system, and the method comprises the steps: requesting for the downloading of a first video segment from all candidate Web content servers, and sorting the server nodes according to an available network bandwidth; selecting the Web content server with the maximum available bandwidth asa service node of a data segmenting request; employing an additive-increase and multiplicative-decrease TCP-like slow start code rate selection method for dynamically obtaining the video segment froma plurality of Web content servers of the distributed DASH system, thereby effectively using the characteristics of the diversified service nodes in the distributed DASH system, and reducing the number of unnecessary buffering times in the play process while reducing the play start time delay. The method employs the service node and code rate selection method based on probability, and achieves thebalance among the fairness and smoothness of paly and the size change smoothness of a buffering region. Meanwhile, the method effectively solves a problem of unfair distribution of bandwidth caused by a condition that a plurality of video streams share the bandwidth in a fixed period scheduling strategy.

A video processing device includes a data segmentation generator that receives a domain selection, n, and that segments input A/V data into n data blocks. An encryption processing device receives an encryption depth selection, k, and a range selection, m, and sequentially encrypts each of the n data blocks m times using k different keys to generate n encrypted data blocks. An output formatter generates encrypted A/V data from the n encrypted data blocks.