发明名称 |
QUALITY OF SERVICE CONTROLLER AND METHOD FOR A DATA STORAGE SYSTEM |
摘要 |
A quality-of-service controller (104) and related method for a data storage system. Requests for each of a plurality of storage system workloads are prioritized. The requests are selectively forwarded to a storage device queue (118) according to their priorities so as to maintain the device queue (118) at a target queue depth. The target queue depth is adjusted response to a latency value for the requests wherein the latency value is computed based on a difference between an arrival time and a completion time of the requests for each workload. Prioritizing the requests may be accomplished by computing a target deadline for a request based on a monitored arrival time of the request and a target latency for its workload. To reduce latencies, the target queue depth may be reduced when the target latency for a workload is less than its computed latency value. To increase throughput, the target queue depth may be increased when the target latency for each workload is greater than each computed latency value |
申请公布号 |
WO2004088547(A3) |
申请公布日期 |
2005.01.13 |
申请号 |
WO2004US09119 |
申请日期 |
2004.03.25 |
申请人 |
HEWLETT-PACKARD DEVELOPMENT COMPANY L.P.;MERCHANT, ARIF;LUMB, CHRISTOPHER;GUILLERMO, ALVAREZ |
发明人 |
MERCHANT, ARIF;LUMB, CHRISTOPHER;GUILLERMO, ALVAREZ |
分类号 |
G06F9/46;G06F9/48;G06F17/30 |
主分类号 |
G06F9/46 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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