摘要:
A system and method for storage of data is described where the data and commands received by a storage system is processed using at least a pair of redundant channels, configured so that received data buffered in a first channel is also buffered by a second channel prior to acknowledgement of the completion of the command execution. This permits a low latency of response to commands while securely storing the data. Data that is buffered in the first channel may be processed for storage, or for deduplication or compression prior to sending to the storage system subsequent to the acknowledgement of completion of the command and the data may then be purged from the data buffers in the redundant channels. A file identified as being smaller in size than the size allocated to associated metadata may be stored as part of the metadata without being sent to the storage system.
摘要:
A memory system and a method for managing the system is described. The system is configured such a plurality of system controllers, which may be RAID controllers, receive requests from the external environment and distribute the requests to a plurality of memory modules such that data may be stored in the memory modules. A global sequence number is assigned to the data of a data stripe so that the operations related to the data stripe are performed in an ordered manner so that the data remains consistent. A plurality of system controllers may comprise a domain and access a plurality of memory controllers and a plurality of domains may include at least one common memory module.
摘要:
A method and system for managing a flash memory system facilitates the use of TRIM or similar operations so as to release physical memory space of logical block addresses (LBAs) that are declared to be deleted by a user file management system. A plurality of data structures corresponding to levels of indirection are used to manage the mapping between a user logical block address and the physical location of the data in the flash memory system and to respond to user read and write requests by determining the current status of the user logical block address in the frame of reference of the memory system. This process substantially decouples TRIM management from garbage collection and wear leveling operations.
摘要:
Cluster data is generated based on a history of storage operations. The cluster data may include an address range and an access history. The access history may comprise a bit pattern that represents a history of storage operations associated with a cluster. A prefix or counter may identify the number of storage operations identified in the bit pattern. The bit pattern and/or address range may be updated to reflect new storage operations associated with the cluster. The bit pattern then may determine when to cache data in a cache memory.
摘要:
A hardware search structure determines the status of cache lines associated with a large disk array and at the same time reduces the amount of memory space needed for tracking the status. The search structure is configurable in hardware to different cache line sizes and different primary and secondary index sizes. A maintenance feature invalidates state record entries based both on their time stamps and on associated usage statistics.
摘要:
Cluster data is generated based on a history of storage operations. The cluster data may include an address range and an access history. The access history may comprise a bit pattern that represents a history of storage operations associated with a cluster. A prefix or counter may identify the number of storage operations identified in the bit pattern. The bit pattern and/or address range may be updated to reflect new storage operations associated with the cluster. The bit pattern then may determine when to cache data in a cache memory. The bit pattern tracks a large number of storage operations in a relatively small amount of memory enabling quick effective caching decisions.
摘要:
A heat dissipation device for an electronic device includes a base, a plurality of fins and at least one heat pipe. The base has a front surface and a rear surface opposite to the front surface. A heat-generating component of the electronic device is disposed adjacent to the rear surface. The plurality of fins extend from the front surface of the base. The heat pipe is disposed on the front surface of the base and in a cutout portion of the plurality of fins. The heat dissipation device, which removes heat from the heat-generating component, has a low profile and improved heat dissipation capability.
摘要:
A storage access system provides consistent memory access times for storage media with inconsistent access latency and reduces bottlenecks caused by the variable time delays during memory write operations. Data is written iteratively into multiple different media devices to prevent write operations from blocking all other memory access operations. The multiple copies of the same data then allow subsequent read operations to avoid the media devices currently servicing the write operations. Write operations can be aggregated together to improve the overall write performance to a storage media. A performance index determines how many media devices store the same data. The number of possible concurrent reads varies according to the number of media devices storing the data. Therefore, the performance index provides different selectable Quality of Service (QoS) for data in the storage media.
摘要:
A memory system and method of operating the same is described, where the memory system is used to store data in a RAIDed manner. The stored data may be retrieved, including the parity data so that the stored data is recovered when the first of either the stored data without the parity data, or the stored data from all but one memory module and the parity data, has been received. The writing of data, for low write data loads, is managed such that only one of the memory modules of a RAID stripe is being written to, or erased, during a time interval.
摘要:
A memory system is described, where the transmission time of data between memory modules is managed so that the overall time delay between specified points in the memory system is maintained a constant. Each lane of a multilane bus may be separately managed, and a data frame evaluated at the destination module, without a need for deskewing at intermediate modules. The time delay in propagation of the data through a module, which may have a switch to route the data, is reduced by operating the data path through the module at one or more submultiples of the bus serial data rate, and selecting the sampling point of the received data so that variations in time delay due to temperature changes or ageing are accommodated.