In this example, the disk speed of the clients are a fast element on the network. Fast clients are not recommended as candidates for multiplexing, as shown in the following calculation:
Before multiplexing:
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Disk read speed of Client 1 = 30 MB/Sec
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Disk read speed of Client 2 = 30 MB/Sec
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Total time for Client 1 and Client 2 to protect 10 GB of data = 342 seconds or 6 minutes (per client) x 2 = 684 seconds or 12 minutes
After multiplexing:
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Disk read speed of Client 1 = 30 MB/Sec
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Disk read speed of Client 2 = 30 MB/Sec
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Speed of tape drive = 40 MB/Sec
Therefore, the disk speed of Client 1 and Client 2 cannot exceed 40 MB/Sec, reducing the disk speed of each client to 20 MB/Sec.