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A. Suppose you use RAID level 0+1 (striping and mirroring) to do blockwise striping over 4 disks, and you have mirrored the data on another 4 disks. Under optimal circumstances (i.e., equal distribution of requests, perfect load balancing), the number of block read accesses allowed by the RAID system would be _. Explain your answer. a. the same as for a single disk b. two times higher than a single disk c. four times higher than a single disk d. eight times higher than a single disk

A. Suppose you use RAID level 0+1 (striping and mirroring) to do blockwise striping over 4 disks, and you have mirrored the data on another 4 disks. Under optimal circumstances (i.e., equal distribution of requests, perfect load balancing), the number of block read accesses allowed by the RAID system would be _. Explain your answer. a. the same as for a single disk b. two times higher than a single disk c. four times higher than a single disk d. eight times higher than a single disk

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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IN2213-G8_W21_As Copy Look Up Select All Share... 4. Suppose you use RAID level 0+1 (striping and mirroring) to do blockwise striping over 4 disks, and you have mirrored the data on another 4 disks. Under optimal circumstances (i.e., equal distribution of requests, perfect load balancing), the number of block read accesses allowed by the RAID system would be Explain your answer. a. the same as for a single disk b. two times higher than a single disk c. four times higher than a single disk d. eight times higher than a single disk
Transcribed Image Text:IN2213-G8_W21_As Copy Look Up Select All Share... 4. Suppose you use RAID level 0+1 (striping and mirroring) to do blockwise striping over 4 disks, and you have mirrored the data on another 4 disks. Under optimal circumstances (i.e., equal distribution of requests, perfect load balancing), the number of block read accesses allowed by the RAID system would be Explain your answer. a. the same as for a single disk b. two times higher than a single disk c. four times higher than a single disk d. eight times higher than a single disk
IN2213-G8_W21_As Copy Look Up Select All Share... 4. Suppose you use RAID level 0+1 (striping and mirroring) to do blockwise striping over 4 disks, and you have mirrored the data on another 4 disks. Under optimal circumstances (i.e., equal distribution of requests, perfect load balancing), the number of block read accesses allowed by the RAID system would be Explain your answer. a. the same as for a single disk b. two times higher than a single disk c. four times higher than a single disk d. eight times higher than a single disk
Transcribed Image Text:IN2213-G8_W21_As Copy Look Up Select All Share... 4. Suppose you use RAID level 0+1 (striping and mirroring) to do blockwise striping over 4 disks, and you have mirrored the data on another 4 disks. Under optimal circumstances (i.e., equal distribution of requests, perfect load balancing), the number of block read accesses allowed by the RAID system would be Explain your answer. a. the same as for a single disk b. two times higher than a single disk c. four times higher than a single disk d. eight times higher than a single disk
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