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dd result too slow?
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dd result too slow?

:~# dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync
16384+0 records in
16384+0 records out
1073741824 bytes (1.1 GB) copied, 445.637 s, 2.4 MB/s

this is kihi hosting KVM

is it because driver problem or others?
look like it is very slow


  • matthewvzmatthewvz Member, Host Rep

    Is virtio enabled?

  • SpartanHostSpartanHost Member, Host Rep
    edited November 2014

    I just did that on one of our VPS's and got 603MB first time and 672MB second time so I'd say there is a major issue with the host node of your VPS rather than anything to do with drivers because it's so bad.

  • hostnoobhostnoob Member
    edited November 2014

    That is low. Open a ticket


  • turnkeyintenetturnkeyintenet Member, Host Rep

    so low I'd think there is something overloading (way beyond overselling) of the node. If it magically improves a day later, and re-occurs on the same slowness every sunday for instance, it could be a disk IO issue during backups (but thats real bad)

  • What seetings are you using for your KVM, namely for the disk? Check solusvm.

  • It's too low even if without virtio driver and during backups.
    Have you tried to open support ticket?

  • Definitely, too slow! Raise the issue with your provider.

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