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  1. #1
    Join Date
    Sep 2007
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    265

    xen network performance

    I read somewhere that vps xen will have lower network speed, comparing to normal dedicated server. Is it true? If yes, is there any way to improve it?

  2. #2
    Join Date
    Jul 2002
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    New York, USA
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    Quote Originally Posted by hpham View Post
    I read somewhere that vps xen will have lower network speed, comparing to normal dedicated server. Is it true? If yes, is there any way to improve it?
    Yes Xen does have some over head about 10-15% lower than using raw hardware. This is because of the network drivers AND ebtables/iptables which every domu must go through.

    There are some tweaks you can do but overall no. This is especially true for a VPS provider that needs the additional security measures in place.
    Larry Ludwig
    Empowering Media
    HostCube - Proactively Managed Xen based VPSes
    Empowering Media - The Dev Null Blog

  3. #3
    Join Date
    Dec 2005
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    3,110
    The overheads really arn't that noticable, we use nodes each with a 100Mbit connection and can still pull right utpo 10M/s from a decent server inside a VPS

  4. #4
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    Mar 2003
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    Quote Originally Posted by Chris E View Post
    The overheads really arn't that noticable, we use nodes each with a 100Mbit connection and can still pull right utpo 10M/s from a decent server inside a VPS
    This is correct. From a wget on a Xen VPS running Ubuntu at Clustered.net:

    27% [=========> ] 28,138,671 11.19M/s

    Perhaps the overheads become noticeable at the Gbit level, but up to 100Mbit seems absolutely fine.

  5. #5
    Join Date
    Jul 2002
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    New York, USA
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    Here are some articles on the subject:

    http://xen.xensource.com/files/xensu...kIO_Santos.pdf
    http://www.cse.psu.edu/~bhuvan/teach...en-net-opt.pdf

    Yes with gbit it seems to show up more.
    Larry Ludwig
    Empowering Media
    HostCube - Proactively Managed Xen based VPSes
    Empowering Media - The Dev Null Blog

  6. #6
    Join Date
    Sep 2007
    Posts
    265
    Quote Originally Posted by Jay Cornwall View Post
    This is correct. From a wget on a Xen VPS running Ubuntu at Clustered.net:

    27% [=========> ] 28,138,671 11.19M/s

    Perhaps the overheads become noticeable at the Gbit level, but up to 100Mbit seems absolutely fine.
    From where to where?

  7. #7
    Join Date
    Nov 2005
    Location
    London UK
    Posts
    695
    Quote Originally Posted by Jay Cornwall View Post
    This is correct. From a wget on a Xen VPS running Ubuntu at Clustered.net:

    27% [=========> ] 28,138,671 11.19M/s

    Perhaps the overheads become noticeable at the Gbit level, but up to 100Mbit seems absolutely fine.
    Don't forget all our VPS are connected via gigabit :-)
    Ultra High Performance UK VPS without compromise.
    HPe servers, Intel NVMe DC P3700/P4600 SSD
    https://clustered.net

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