发明名称 |
Fault tolerant architectures for continuous media servers |
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. |
申请公布号 |
US6079028(A) |
申请公布日期 |
2000.06.20 |
申请号 |
US19970839188 |
申请日期 |
1997.04.23 |
申请人 |
LUCENT TECHNOLOGIES INC. |
发明人 |
OZDEN, BANU;RASTOGI, RAJEEV;SHENOY, PRASHANT J.;SILBERSCHATZ, ABRAHAM |
分类号 |
G06F11/10;(IPC1-7):G06F11/00 |
主分类号 |
G06F11/10 |
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