File extraction question

55 pts.
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computer information
File extraction
General
I have a zipped file on a network located in our office in Detroit. I'm located in LA. Why does unzipping the file from LA (using 7-zip) take 3 hours but remoting into a machine in Detroit and unzipping (using 7-zip) takes only 3 minutes? 

I understanding copying files locally versus across different networks but why why would location matter in this instance?
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  • ToddN2000
    How are you unzipping it? Copying the zip file to your local machine then unzipping would be faster. If you are trying trying to unzip and send the unzipped data across the network to you local machine, you have to deal with bandwidth issues. More users on the network the slower the transfer of the unzipped data. 
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  • Scruffy04
    Everything is being unzipped via 7-zip. It's just surprising to me that a singular zipped folder located on a server hosted in Detroit would unzip quicker if I remote into a machine located in the same office compared to if I'm using my machine in LA. It take 3 minutes to unzip that file when doing so on a machine located in Detroit compared to 3 hours on my end.

    The file isn't moving. The only difference is where the machine is located that's executing the unzipping of the file. 
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  • ToddN2000
    Remoting into a machine in Detroit will do a local unzip. You are basically taking control of that Detroit PC and issuing commands that will run locally. Like you were sitting in front of it.  It does not have to send the unzipped data across the network to LA, The unzipped data stays on the local machine in Detroit. If you are trying to get the data to your local machine in LA then that data has to deal with bandwidth and network  connections. 
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  • Scruffy04
    That's the thing though, the data is not being copied to my local machine in LA. Everything is on the Detroit network. The only difference is where is the process of the unzip occurring. On a LA PC or Detroit PC. But the data is always staying in the same network drive. 
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  • ToddN2000
    Then there is something i'm not getting. 
    You are in LA, 
    You go into the network directory and find the zip file.
    When you unzip the file, where are you telling it to unzip to?
    Are you specifying the C\: drive or a folder or the desktop?
    After the data is unzipped, how do you access it ? 

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  • Scruffy04
    Let's just say the file is located here: \\network_drive\Detroit\file.zip

    The file is always in this location. 

    LA PC = 3 hours
    Detroit PC= 3 minutes
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  • Scruffy04
    The file is being extracted into the same folder location
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  • ToddN2000
    Then I'm at a loss. I don't know why you would even zip the file if you're just unzipping to the same location.You usually only zip file to speed up data transfers.You might be better off talking to your networking people and have them take a look. See if there is a usage lock on the file or something else weird happening.  If the file in in \network_drive\Detroit\file.zip and you unzip it to \network_drive\Detroit\unzipped.xxx there should not be any difference really whether the command was run from LA or from a remote session to a Detroit PC that I can think of. 

     
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  • Scruffy04
    There's clearly miscommunication here, which is fine. I'm just not sure how else to explain it. 

    It's just a question of why would a zipped file take longer  to unzip from a machine located in one location but not another.

    No worries. Thank you for your help. 
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  • Subhendu Sen
    Are the both system's configuration is more or less same? What RAM/ processor is there? Have you tried other zip utilities like WinZip or something other? Is there a scope to use another tool to use other than 7-Zip?
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  • TheRealRaven
    There are numerous possibilities. First, where is "network_drive"? There are at least two devices in different locations -- an L.A. PC and a Detroit PC. Is "network_drive" on either of those, or is it on some third device somewhere else? If somewhere else, what is the network path from it to each of the other two devices? Without knowing that, it's not really possible to ask the questions needed to arrive at a final answer.

    Second, what are the specs of the two PCs?

    Depending on the route to the two PCs, the network time from "network_drive" to each PC might show a significant difference. The .ZIP file will likely be copied to the PC before an unzip can make progress. The PCs' network adapters alone could be enough of a bottleneck, especially with a poor configuration.

    The CPUs, the amount of (available) RAM, memory speeds, other processes that might be running, available drive space, fix packs installed... many things can affect results.
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  • Subhendu Sen
    Also have you tried to extract files other than this problematic system? Something is wrong which might be a minor issue.  
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