摘要:
An updateable list is provided for use in mounting a storage volume. Such list may include a plurality of block references capable of being used to access corresponding blocks required for mounting the storage volume. In use, such list may be utilized for accessing the blocks in a more efficient manner, by accessing a plurality of such blocks in parallel, as well as performing the block accessing and storage volume mounting in parallel.
摘要:
Methods and apparatus are disclosed for imaging molecular interactions in living cells at high resolution, low light levels and high acquisition speeds.
摘要:
A technique is described for improving throughput in a processing system, such as a network storage server. The technique provides multiple levels (e.g., a hierarchy) of parallelism of process execution within a single mutual exclusion domain, in a manner which allows certain operations on metadata to be parallelized as well as certain operations on user data. The specific parallelization scheme used in any given embodiment is based at least partly on the underlying metadata structures used by the processing system. Consequently, a high degree of parallelization possible, which improves the throughput of the processing system.
摘要:
Method and system for replicating a storage volume is provided. Information is adaptively replicated in a swap mode or a copy mode. When information is copied from a storage volume to a memory buffer, an application determines if another information transfer from the same source volume is pending. If a transfer from the same source is pending, then information is copied from the memory buffer to a stolen buffer in a copy mode. If a transfer from the same source is not pending, then instead of copying the information, the application enables a swap mode. During the swap mode, an operating system for a storage system swaps a pointer from the stolen buffer to information stored in the memory buffer. The memory buffer itself is invalidated so that no other module can access the memory buffer. Because the pointers are swapped, the application accesses information directly from the memory buffer.
摘要:
A technique for efficiently scanning various datasets in a storage system to generate metadata for shared data blocks is provided. In one embodiment, data containers in an active file system of a storage object are first scanned. Remaining images (e.g., snapshots of the file system) are arranged in a chronological order based on the age of such images in the storage object. In some instances, to perform a metadata scan of a given image, the storage server compares each data container in the given image to a corresponding data container in a prior image (from the chronological order) to identify any non-identical data blocks (i.e., blocks that are not common between the data containers of the two images) in each data container. The metadata scanner then generates metadata only for the non-identical data blocks in each data container and skips metadata generation for any remaining data blocks.
摘要:
A method and apparatus for retention of active data stored in memory using multiple indexing systems for data storage. An embodiment of a method for retention of active data in a storage server includes reading data into a first location of a main memory of the storage server. The data in the first location indexes data elements in a long-term data storage in a first manner. The method further provides for copying the data from the first location into a second location in the main memory of the storage server, where the data in the second location indexing the data elements in the long-term data storage in a second manner.