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Thread: Does zypper throttle download speeds?

  1. #1

    Default Does zypper throttle download speeds?

    One of the few things that I dislike about opensuse is the slow downloads speeds I get with zypper. I've manually added the fastest server in my area with zypper but I only get speeds of less than 150kbps. I get speeds of 2MBps if I download the same file with Yast or manually download with aria2c. That's almost 15x faster!

    What makes zypper so slow?

  2. #2
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    Default Re: Does zypper throttle download speeds?

    Some users have complained about it, but strangely enough the one thing pointed to as being a likely culprit is the one you claim works (aria). It has been suggested that where the implementation of p2p takes place in zypper (with aria), that this is causing the slow down, where ISP's are using traffic management on p2p.
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  3. #3

    Default Re: Does zypper throttle download speeds?

    Do you, or anyone else, know if there's a way to disable the p2p feature of zypper? I checked out /etc/zypp/zypp.conf + zypper.conf but I didnt' see anything about it.

    I've been using aria as my main direct download manager for a while and never had problems, so it's probably the p2p feature.

  4. #4
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    Default Re: Does zypper throttle download speeds?

    I have to leave the forum right now so I don't have time to check this. There is a workaround I'm sure. Plenty of other help here so just keep a watch
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  5. #5
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    Default Re: Does zypper throttle download speeds?

    On Mon, 25 Jan 2010 06:56:02 +0000, londy wrote:

    > Do you, or anyone else, know if there's a way to disable the p2p feature
    > of zypper? I checked out /etc/zypp/zypp.conf + zypper.conf but I didnt'
    > see anything about it.
    >
    > I've been using aria as my main direct download manager for a while and
    > never had problems, so it's probably the p2p feature.


    I think there's a little misunderstanding of what aria is here. Aria is
    capable of doing p2p downloads using torrents or metalink, but that's not
    all it does. It also is capable of opening multiple connections to an
    ftp or web server to download a file - and that's what it does for the
    downloads here (as far as I know, anyways) - so you're not using its p2p
    functionality to download patches.

    It could be that it's just picking a slow mirror or the mirrors are busy.

    Jim
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  6. #6

    Default Re: Does zypper throttle download speeds?

    The case with me is totally opposite ... Yast is so slow that I have disabled automatic refresh. I refresh the repos by using "zypper ref". Even when I install someting using zypper, it is much faster than using Yast... The thing is I have to kill Yast many times because of its slow speed.
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  7. #7

    Default Re: Does zypper throttle download speeds?

    I just wish I knew exactly how zypper is using aria but that info doesn't seem to be readily available. Zypper has always been slow since I installed opensuse a month ago. I've tested the mirrors that I added and they're all fast, so I don't think it's a problem with the mirrors.

    Yesterday, I download about 200MB of packages and it was downloading under 10kbps. Something definitely ain't working right.

  8. #8
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    Default Re: Does zypper throttle download speeds?

    On Tue, 26 Jan 2010 05:06:02 +0000, vendetta18 wrote:

    > The case with me is totally opposite ... Yast is so slow that I have
    > disabled automatic refresh. I refresh the repos by using "zypper ref".
    > Even when I install someting using zypper, it is much faster than using
    > Yast... The thing is I have to kill Yast many times because of its slow
    > speed.


    Interesting; I don't see that kind of issue, but it could be a matter of
    proximity to the mirror that's selected, too - or different definitions
    of "slow" for that matter. :-)

    Jim



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  9. #9
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    Default Re: Does zypper throttle download speeds?

    On Tue, 26 Jan 2010 09:16:02 +0000, londy wrote:

    > Yesterday, I download about 200MB of packages and it was downloading
    > under 10kbps. Something definitely ain't working right.


    That is problematic - I download the 200 MB of updates fairly quickly,
    usually at full speed. Sometimes I wish I could throttle the download
    somehow, in fact.

    You might look through the zypper log file (that's how I discovered it
    was using aria - I had problems with updates on one machine because the
    code calls "aria2" rather than "/usr/bin/aria2" and I had previously
    installed aria2 in /usr/local/bin before an upgrade - and the version I
    had was too old).

    The log files are very detailed, so it could take some time to review and
    see where the bottleneck might be.

    Jim

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  10. #10
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    Unhappy Re: Does zypper throttle download speeds?

    At least in my location (using Comcast 16Mbps cable), downloads generally start off very fast, generally in the 300-700KB/s range.

    Frequently, mid-download, this will suddenly throttle back to 10-20KB/s - sometimes less - and stay that way until the end of that file, then resume high speed download with the next file.

    I am guessing that something in the download is triggering Comcast's network management software to throttle back my connection.

    Despite this, I don't believe that Comcast throttles connections so severely. I suspect that I am seeing a poor interaction with however zypp communicates and the way that Comcast throttles bandwidth.

    Any ideas on what I should try changing to get around this?

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