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  1. #1

    Post your VPS disk performance

    On my virtuozzo VPS I get 2m38 for a 1GB file (ie 6MB/sec) with this test:

    # time dd if=/dev/zero of=testfile.txt count=1024 bs=1M

    1024+0 records in
    1024+0 records out

    real 2m38.235s
    user 0m0.000s
    sys 0m71.060s

    Is that normal? What do you get with your vps?

    Thanks

  2. #2
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    time dd if=/dev/zero of=testfile.txt count=1024 bs=1M
    1024+0 records in
    1024+0 records out

    real 0m8.875s
    user 0m0.000s
    sys 0m1.950s
    UK SSD VPS without compromise - upto 250k IOPS !
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  3. #3
    Join Date
    Sep 2005
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    .

    SLHost

    1024+0 records in
    1024+0 records out

    real 0m10.560s
    user 0m0.002s
    sys 0m3.024s


    PowerVPS

    1024+0 records in
    1024+0 records out

    real 0m44.614s
    user 0m0.000s
    sys 0m7.410s


    I assume that performance depends on disk load, or does it not?
    can you please clarify this ?


    ulysseNL

    .
    Last edited by ulysseNL; 12-21-2006 at 02:16 PM.

  4. #4
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    Houston, Texas
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    x1services

    1024+0 records in
    1024+0 records out

    real 0m20.956s
    user 0m0.007s
    sys 0m6.757s

    virpus.com


    1024+0 records in
    1024+0 records out
    1073741824 bytes (1.1 GB) copied, 40.7641 seconds, 26.3 MB/s

    real 0m41.581s
    user 0m0.009s
    sys 0m14.411s
    Hostmaven.com
    1024+0 records in
    1024+0 records out

    real 0m54.778s
    user 0m0.001s
    sys 0m5.522s
    futurehosting.biz

    1024+0 records in
    1024+0 records out

    real 3m50.551s
    user 0m0.003s
    sys 0m8.046s
    Last edited by donniesd; 12-21-2006 at 02:19 PM.
    Upfront Business Solutions
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  5. #5
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    [[email protected] ~]# time dd if=/dev/zero of=testfile.txt count=1024 bs=1M
    1024+0 records in
    1024+0 records out

    real 0m4.988s
    user 0m0.001s
    sys 0m4.094s


  6. #6
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    .

    I have now run this "test" multiple times on the same server, and I get wildly varying results each time. so, results are meaningful for comparison purposes only when obtained under exactly the same conditions in a lab situation.

    otherwise this "test" is (almost) meaningless.

    ulysseNL

    .

  7. #7
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    aaack!

    real 5m59.212s
    user 0m0.003s
    sys 0m9.531s

    It really lit up my loadavg too!

    This VPS scored over 220 in the regular VPS benchmarks.
    Attached Thumbnails Attached Thumbnails lit-up.gif  

  8. #8
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    Some VPS sellers offer dedicated disk subsystems for VPSs. This is a pretty nice option, as one of the biggest shortcommings of a VPS is IO.
    Rock solid hosting and dedicated servers since 1998!
    StabilityHosting Where stability and uptime are king!

  9. #9
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    hmmm.... a vps with my own dedicated disk? Have to be a BIG plan. how many of those could you put in a 1 or 2u box? I'd be interested in the system architecture of something like that if you have a link.

  10. #10
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    Doesnt have to be a disk, It can be done with a LUN on a SAN or with iSCSI now. Or even NFS. Just something to give you some dedicated IO. We have customers that we slice off 4 or 5 gig LUNs for. It can make a pretty big differance, particularly if you do a lot of MySQL Writes. MyISAM tables are VERY sensetive to slow disk writes.
    As for system arch... We use differant systems than most other providers. The docs on what we use can be found on http://docs.sun.com.
    PM me specific questions and I would be happy to go into greater depth.
    Rock solid hosting and dedicated servers since 1998!
    StabilityHosting Where stability and uptime are king!

  11. #11
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    I'll check that out, thx.

  12. #12
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    So what do these 3 numbers tell you? In fact, what does this tell the server to do?

    time dd if=/dev/zero of=testfile.txt count=1024 bs=1M

  13. #13
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    I think it times how long it takes to write a text file that is 1gb in size. 1024 is 1mb, and 1M means 1000. 1024x1000 = 1gb

    It is not quite a perfect test... I'll suspect that the results vary depending on outside factors (cpu utilization, for example) than just pure disk i/o throughput.

    Don't forget to go to /root and delete the big honking text file. Or better yet... send it as an email attachment to your buddy's sidekick3. hehehe <---evil laugh
    Last edited by jiarby; 12-22-2006 at 06:18 PM.

  14. #14
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    Noticed testfile.txt in the root directory. Now can you give an example of syntax that will delete this file? Thanks so much!

  15. #15
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    I just did mine from the gui filemanager interface in VZPP.

    probably rm /root/testfile.txt

  16. #16
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    Ran your test on one of our Xen VPS Guests and got the following...

    real 0m7.531s
    user 0m0.020s
    sys 0m3.980s

    btw, The host this VPS is running on is 75% full, not empty...

  17. #17
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    Quote Originally Posted by jiarby
    I just did mine from the gui filemanager interface in VZPP.

    probably rm /root/testfile.txt
    Hmmm, is there a link to that within WHM or is this something different?

  18. #18
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    VZPP is the Virtuozzo Power Panel, if your provider does not use Virtuozzo then you will not have it. Even if they do... it is optional whether you have access to it.

    To access it use
    http://youripddress:4643

    If you don't get a login window I'd say the odds are you are using a different partitioning package.

  19. #19
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    Thanks for the port #. I used it and can log in to a Virtuozzo Control Panel. but... I do not find a file manager GUI anywhere. Can someone shed some light?

    I did get a response from tech support that there is no GUI for file management so maybe this is not enabled?

  20. #20
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    Like WHM, your provider can enable/disable options.

    See attached image for location of filemanager in my VZPP

    if you have ssh just use the rm command.
    Attached Thumbnails Attached Thumbnails vzpp.gif  

  21. #21
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    Thumbs up Updated Performance

    aaack!

    real 5m59.212s
    user 0m0.003s
    sys 0m9.531s

    It really lit up my loadavg too!
    After bringing this to Vik's (FutureHosting.Biz) attention he did some tinkering to my server and it is now performing as follows:

    real 0m21.490s
    user 0m0.004s
    sys 0m9.668s

    Check them out when VPS shopping...my server is performing quite well

  22. #22
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    I fail to see the usefulness of this test really.

    A better test may be:
    time dd if=/dev/urandom of=testfile.txt count=1024 bs=1M

    This will generate a 1GB file filled with random numbers instead of zero's, so it'll be harder on the server as it requires more server resources and also uses CPU.
    Andrew Cranson, Director of Operations
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  23. #23
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    Wasn't the goal to test disk i/o rather than cpu performance? There are other benchmarks if you want to look at cpus./

  24. #24
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    [[email protected] /]# time dd if=/dev/zero of=testfile.txt count=1024 bs=1M
    1024+0 records in
    1024+0 records out

    real 0m4.561s
    user 0m0.002s
    sys 0m1.508s


    [[email protected] /]# time dd if=/dev/zero of=testfile.txt count=1024 bs=1M
    1024+0 records in
    1024+0 records out

    real 0m1.656s
    user 0m0.002s
    sys 0m1.462s



    (this is on one of navid's servers)
    Last edited by marsepein; 01-01-2007 at 02:45 PM.

  25. #25
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    Quote Originally Posted by marsepein
    [[email protected] /]# time dd if=/dev/zero of=testfile.txt count=1024 bs=1M
    1024+0 records in
    1024+0 records out

    real 0m4.561s
    user 0m0.002s
    sys 0m1.508s


    [[email protected] /]# time dd if=/dev/zero of=testfile.txt count=1024 bs=1M
    1024+0 records in
    1024+0 records out

    real 0m1.656s
    user 0m0.002s
    sys 0m1.462s



    (this is on one of navid's servers)
    What is the exact spec of this server ?

    I have been unable to get *anywhere* near this even on a $15k unloaded server !

    This is 3 times faster than anything I've seen which makes it questionable without additional information.
    Last edited by reiteration; 01-01-2007 at 03:08 PM.
    UK SSD VPS without compromise - upto 250k IOPS !
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  26. #26
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    It could be XFS filesystem, XFS will delay writes making it trivial to write out a 1GB file in a second. Yet-more-proof-why-these-threads-are-pointless.
    Matt Ayres - togglebox.com
    Linux and Windows Cloud Virtual Datacenters powered by Onapp / Xen
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  27. #27
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    Dec 2006
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    I was as surprised as you are, but I have not edited these.
    This particular machine has:

    CPU0 Model Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz
    CPU0 Speed 2.4GHz
    CPU0 Cache 4096 KB

    WD740GD sata2 disks in RAID.

    All done within a stripped down Fedora Core 4.
    I have no further specs on actual mainboard and such.

  28. #28
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    time dd if=/dev/zero of=testfile.txt count=1024 bs=1M
    1024+0 records in
    1024+0 records out

    real 0m34.132s
    user 0m0.002s
    sys 0m5.833s

    ____________

    I don't even know what does this information mean for me -_- can someone explains to me pls ?

  29. #29
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    On one of our VPS:10's:

    [[email protected] ~]# vzctl enter 6313
    entered into VE 6313
    -bash-3.00# time dd if=/dev/zero of=testfile.txt count=1024 bs=1M
    1024+0 records in
    1024+0 records out

    real 0m3.186s
    user 0m0.002s
    sys 0m3.045s
    Andrew Cranson, Director of Operations
    Layershift Fully Managed Cloud Hosting :: WizzVPS Cheap Unmanaged VPS :: UK, USA, Singapore
    Jelastic :: Next generation PaaS - UK Java & PHP Hosting
    True 24x7 Technical Support - peace of mind around the clock!

  30. #30
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    Quote Originally Posted by mealto
    Thanks for the port #. I used it and can log in to a Virtuozzo Control Panel. but... I do not find a file manager GUI anywhere. Can someone shed some light?

    I did get a response from tech support that there is no GUI for file management so maybe this is not enabled?
    I just logined in and found the file manager. But there is also another option.

    -Open Filezilla FTP program
    -Make a new site
    -Enter site url
    -Then where it says "servertype"
    -Choose SFTP not FTP
    -Username should be "root"
    -Password will be your root password. Should be the same one you used to login to Virtuozzo Control Panel.
    -Then you should have the same file manager as you do in Virtuozzo Control Panel.



    My results were:

    1024+0 records in
    1024+0 records out

    real 0m32.410s
    user 0m0.005s
    sys 0m12.059s

  31. #31
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    I have a question. Where does the server save the 1gb file. I want to delete it from my VPS.

  32. #32
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    It will be in whichever directory you ran the command in.
    Zac Cogswell
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  33. #33
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    Nevermind just used some shell commands and deleted it. I just learned how to use shell and I love It.

  34. #34
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    Kusadasi, Turkey
    Posts
    3,273
    1024+0 records in
    1024+0 records out

    real 0m6.011s
    user 0m0.007s
    sys 0m5.004s

    A JaguarPC VPS with many active clients on it. I think that is pretty good.

  35. #35
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    a2b2 UK vps

    1024+0 records in
    1024+0 records out

    real 1m8.909s
    user 0m0.003s
    sys 0m3.536s

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