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Thread: How to speedup transfer rate when copying big files?

  1. #1
    Join Date
    Apr 2021
    Beans
    3

    How to speedup transfer rate when copying big files?

    Hi,

    Below is an example when I copy 2 files of around 2GB using rsync on a 16GB USB key (msdos filesystem type). The first file has a transfer rate of 200MB/s, the second one only 12MB/s.
    Kernel: 5.8.0-48-generic x86_64 bits: 64
    Distro: Ubuntu 20.04.2 LTS
    Memory: 15.50 GiB

    Could you please tell me how to speedup transfer rate for the second file (in addition one has to wait 2 more minutes after the second file is transfered)?
    Code:
    randomguy@heaven1:~/backup$ rsync -avv --progress backup.20210402.tgz.a* /media/randomguy/KINGSTON/
    sending incremental file list
    delta-transmission disabled for local transfer or --whole-file
    backup.20210402.tgz.aa  2,097,152,000 100%  200.50MB/s    0:00:09 (xfr#1, to-chk=1/2)
    backup.20210402.tgz.ab  1,813,868,515 100%   12.16MB/s    0:02:22 (xfr#2, to-chk=0/2)
    
    total: matches=0  hash_hits=0  false_alarms=0 data=3911020515
    
    sent 3,911,975,510 bytes  received 121 bytes  11,872,460.19 bytes/sec
    total size is 3,911,020,515  speedup is 1.00
    Thank you for your help.

  2. #2
    Join Date
    May 2013
    Location
    Galiza
    Beans
    4,010
    Distro
    Ubuntu

    Re: How to speedup transfer rate when copying big files?

    Welcome.

    I'm sure you understand that such high speeds aren't "real". What is shown is the transference rate for the origin to RAM, not from origin to destiny directly. It's impossible for any USB flash memory currently available to achieve 200MB/s writing speed.

    The system is working as expected, there's nothing to speed up.

  3. #3
    Join Date
    Mar 2011
    Location
    U.K.
    Beans
    Hidden!
    Distro
    Ubuntu 20.04 Focal Fossa

    Re: How to speedup transfer rate when copying big files?

    Consider also USB 3.0 instead of USB 2.0 port.

    https://www.usr.com/education/usb3-p...20and%20cables.

    I run Ubuntu on external SSD through USB 3.0 port.

  4. #4
    Join Date
    Apr 2021
    Beans
    3

    Re: How to speedup transfer rate when copying big files?

    Thank you CelticWarrior & dragonfly41! The given speed is indeed 100MB/s read, 15MB/s write. I use the USB 3.0 port.

  5. #5
    Join Date
    Oct 2005
    Location
    Lab, Slovakia
    Beans
    10,332

    Re: How to speedup transfer rate when copying big files?

    You can speed it up by buying better quality flash memory devices. SD cards come with speed ratings of 4, 6, 10 etc. With USB sticks, you are kinda lost in a sea of sargassum though.
    Last edited by HermanAB; 4 Weeks Ago at 03:00 PM.

  6. #6
    Join Date
    May 2010
    Beans
    1,270

    Re: How to speedup transfer rate when copying big files?

    eSATA may help instead of USB

  7. #7
    Join Date
    Apr 2021
    Beans
    3

    Re: How to speedup transfer rate when copying big files?

    Good ideas:
    SD card reader on USB-C port
    eSATA external drive on USB-C port

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