t***e 发帖数: 71 | 1 假设数据库block大小为2048bytes,每个block holds 16 records,随机存储。
disk属性为:min seek time 3ms,max seek time 12ms,roatation time 6ms
transfer rate 20MB/Sec
ask: compute the average access time to retrieve a given record in
a given block
各位,请帮帮忙!很着急,谢谢~~~!!!! |
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