Suppose that I have 800 Gigabytes worth of movies on my hard drive at home, and I’d like to get them to a friend in Chicago. I could either send them over the Internet, or I could copy them to a thumb drive, drive to Chicago, and deliver them by hand. Assume that the specs for my cable connection 50 Mbps download / 10 Mbps upload, but the friend in Chicago has a cable connection which gets 25 Mbps download/5 Mbps upload. Which would

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
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Suppose that I have 800 Gigabytes worth of movies on my hard drive at home, and I’d like to get them to a friend in Chicago. I could either send them over the Internet, or I could copy them to a thumb drive, drive to Chicago, and deliver them by hand. Assume that the specs for my cable connection 50 Mbps download / 10 Mbps upload, but the friend in Chicago has a cable connection which gets 25 Mbps download/5 Mbps upload. Which would be faster? Show your work. Note: you are 3 hours from Chicago
Expert Solution
Step 1

The first step is to convert the file size of 800 GB to a transfer rate in Mbps (Megabits per second) for both options.

 

Option 1: Sending over the internet

Assuming the friend in Chicago has a server that can accept the files, we can use the upload speed of my cable connection to estimate how long it would take to transfer the files. 800 GB is equal to 800,000 MB (Megabytes) or 6,400,000 Mb (Megabits).

 

Upload speed from my connection = 10 Mbps

Time to transfer = (6,400,000 Mb) / (10 Mbps) = 640,000 seconds.

So it would take 640,000 seconds or approximately 7.4 days to upload the files to the internet.

 

Option 2: Copying to a thumb drive and driving to Chicago

Assuming I can copy the files to a thumb drive at a speed of 100 MB/s (Megabytes per second) and that the drive to Chicago takes 3 hours (180 minutes), we can calculate the time it would take to transfer the files.

 

 

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