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    • 89. 发明申请
    • A BOTTOM-UP CACHE STRUCTURE FOR STORAGE SERVERS
    • 存储服务器的底部高速缓存结构
    • WO2005043395A1
    • 2005-05-12
    • PCT/US2004/034772
    • 2004-10-20
    • THE BOARD OF GOVERNORS FOR HIGHER EDUCATION STATE OF RHODE ISLAND: PROVIDENCE PLANTATIONYANG, QingZHANG, Ming
    • YANG, QingZHANG, Ming
    • G06F12/00
    • G06F12/0866G06F12/0897G06F2212/311G06F2212/312
    • A networked storage server (400) has a bottom-up caching hierarchy. The bottom level cache (412) is located on an embedded controller (409) that is a combination of network interface card (NIC) and host bus adapter (HBA). Storage data (1) coming from or going to network are cached at this bottom level cache (412) and metadata (2) related to these data are passed to server host (402) for processing. When cached data exceed the capacity of the bottom level cache (412), data are moved to the host memory (410) that is usually much larger than the memory on the controller. For storage read requests from the network, most data are directly passed to the network through the bottom level cache (412) from the storage device (413) such as a hard drive or RAID. Similarly for storage write requests from the network, most data are directly written to the storage device (413) through the bottom level cache without copying them to the host memory (410). Such data caching at the controller level dramatically reduces bus traffic resulting in great performance improvement for networked storages.
    • 网络存储服务器(400)具有自底向上的缓存层次结构。 底层缓存(412)位于作为网络接口卡(NIC)和主机总线适配器(HBA)的组合的嵌入式控制器(409)上。 来自或去往网络的存储数据(1)被缓存在该底层缓存(412),并且与这些数据相关的元数据(2)被传递到服务器主机(402)以进行处理。 当高速缓存的数据超过底层高速缓存的容量(412)时,将数据移动到通常比控制器上的存储器大得多的主机存储器(410)。 对于来自网络的存储读请求,大多数数据通过诸如硬盘驱动器或RAID的存储设备(413)的底层缓存(412)直接传递到网络。 类似地,对于来自网络的存储写入请求,大多数数据通过底层高速缓存直接写入存储设备(413),而不将其复制到主机存储器(410)。 在控制器级别的这种数据缓存大大降低了总线流量,从而为网络存储提供了极大的性能提升。