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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0380657 (1995-01-30) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 307 인용 특허 : 0 |
An apparatus and method is provided for allocating a data file across a plurality of media servers in a network, wherein each media server has associated therewith one or more levels of I/O devices organized in a hierarchical manner. An attempt is made to allocate the storage of data across the I/O
An apparatus and method is provided for allocating a data file across a plurality of media servers in a network, wherein each media server has associated therewith one or more levels of I/O devices organized in a hierarchical manner. An attempt is made to allocate the storage of data across the I/O devices in such a way that the bandwidth imposed on the devices when the data file is sequentially accessed will be balanced, and optimum use of I/O bandwidths at all points in the system is achieved. This balancing can be done by incorporating knowledge regarding various bottlenecks in the system into the decisionmaking process required for distributing the data blocks. The method and apparatus further allows bandwidths to be allocated to various clients in the system at the time a data file is opened. Various checks are provided at the time a data file is accessed to ensure that the data rates actually imposed by the requesting client do not exceed that requested by the client at the time the data file was opened. The invention allows for much more efficient use of the I/O resources in a system and ensures that a given configuration will be able to support client requests.
A method of storing a data file across a plurality of media servers in a network, each media server having a plurality of first-level I/O devices and a plurality of second-level I/O devices, each second-level I/O device being controlled by one of the first-level I/O devices, the method comprising th
A method of storing a data file across a plurality of media servers in a network, each media server having a plurality of first-level I/O devices and a plurality of second-level I/O devices, each second-level I/O device being controlled by one of the first-level I/O devices, the method comprising the steps of: (a) dividing the data file into a plurality of data blocks; (b) allocating the plurality of data blocks across each of the plurality of media servers; (c) allocating each of the data blocks allocated to each media server in step (b) to first-level I/O devices in that media server according to the bandwidth availability of the first-level I/O devices in that media server; (d) allocating each of the data blocks allocated to each first-level I/O device in step (c) to second-level I/O devices controlled by that first-level I/O device in accordance with the bandwidth availability of the second-level I/O devices; and (e) storing each of the data blocks onto the second-level I/O devices in accordance with the allocation made in step (d).
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