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1. 发明授权

US6079028A Fault tolerant architectures for continuous media servers 失效
标题翻译：连续媒体服务器的容错架构
公开(公告)号：US6079028A
公开(公告)日：2000-06-20
申请号：US839188
申请日：1997-04-23
申请人： Banu Ozden , Rajeev Rastogi , Prashant J. Shenoy , Abraham Silberschatz
发明人： Banu Ozden , Rajeev Rastogi , Prashant J. Shenoy , Abraham Silberschatz
IPC分类号： G06F11/10 , G06F11/00
CPC分类号： G06F11/1076 , G06F2211/1016
摘要： A continuous media server that provides support for the storage and retrieval of continuous media data at guaranteed rates using one of two fault-tolerant approaches that rely on admission control in order to meet rate guarantees in the event of a failure of the data storage medium that renders part of the continuous media inaccessible. In the first approach, a declustered parity storage scheme is used to uniformly distribute the additional load caused by a disk failure, uniformly across the disks. Contingency bandwidth for a certain number of clips is reserved on each disk in order to retrieve the additional blocks. In the second approach, data blocks in a parity group are prefetched and thus in the event of a disk failure only one additional parity block is retrieved for every data block to be reconstructed. While the second approach generates less additional load in the event of a failure, it has higher buffer requirements. For the second approach, parity blocks can either be stored on a separate parity disk, or distributed among the disks with contingency bandwidth reserved on each disk.
摘要翻译：一种连续的媒体服务器，其以保证的速率提供对连续媒体数据的存储和检索的支持，使用依赖于准入控制的两种容错方法之一，以便在数据存储介质发生故障的情况下满足速率保证使部分连续媒体无法访问。在第一种方法中，使用解聚奇偶校验存储方案来均匀地分布由磁盘故障引起的附加负载，均匀地分布在磁盘上。为了检索附加的块，在每个磁盘上保留一定数量的剪辑的应急带宽。在第二种方法中，奇偶校验组中的数据块被预取，因此在发生磁盘故障的情况下，仅针对要重建的每个数据块检索一个附加奇偶校验块。虽然第二种方法在发生故障时产生较少的额外负载，但它具有较高的缓冲区要求。对于第二种方法，奇偶校验块可以存储在单独的奇偶校验磁盘上，或者分布在每个磁盘上预留有应急带宽的磁盘之间。

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