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Thread: Execution time of bonnie++

  1. #1

    Default Execution time of bonnie++

    Having recently discovered the wonderful utility bonnie++ I've got a quick question to help me understand something about benchmarking my system. I've got a Slice on Slicehost, just a small one with 256MB that I use for some personal projects, and when I run a command like this:

    Code:
    /usr/sbin/bonnie++ -d /tmp/foo -n 256
    it runs really quickly. However, when I run it at home on my home PC with 8GB of RAM it takes forever. I suspect it has to do with the "Chunk Size" of Bonnie++, but could anybody explain to me why they are different?

    Thanks,

    Joe

  2. #2
    Join Date
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    Default Re: Execution time of bonnie++

    TheDelChop wrote:
    > Having recently discovered the wonderful utility bonnie++ I've got a
    > quick question to help me understand something about benchmarking my
    > system. I've got a Slice on Slicehost, just a small one with 256MB that
    > I use for some personal projects, and when I run a command like this:
    >
    >
    > Code:
    > --------------------
    >
    > /usr/sbin/bonnie++ -d /tmp/foo -n 256
    >
    > --------------------
    >
    >
    > it runs really quickly. However, when I run it at home on my home PC
    > with 8GB of RAM it takes forever. I suspect it has to do with the
    > "Chunk Size" of Bonnie++, but could anybody explain to me why they are
    > different?


    Bonnie++ will use a size that is TWICE whatever your memory size is to
    attempt to avoid memory cache optimizations which might make the storage
    device appear to be unrealistically fast.

  3. #3

    Default Re: Execution time of bonnie++

    Ah I see, so its the size of the chunk that effects the run time of bonnie++?

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