Slow Transfer Speeds from KVM host to client

Posted by indian maiden on Server Fault See other posts from Server Fault or by indian maiden
Published on 2012-12-20T08:19:45Z Indexed on 2012/12/20 11:04 UTC
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Filed under:

Performance

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kvm-virtualization

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tcp

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transfer

I am trying to isolate the root cause of slow transfer speeds from my host OS to a KVM client. Both are Linux.

Rsync on the host 192.168.1.72

rsync -auv --progress rut3.img  /tmp/   [54.09MB/s]

Rsync to the client:

rsync -auv --progress rut3.img  192.168.1.80:/tmp/ [25.52MB/s]

I realize that there will be some TCP overhead on the transfer but over 50%? Can someone enlighten me on what could be slowing down the transfers so much?

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