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[Xen-users] scp performance from machine to guest

To: xen-users list <xen-users@xxxxxxxxxxxxxxxxxxx>
Subject: [Xen-users] scp performance from machine to guest
From: Zach Moazeni <zach.lists@xxxxxxxxx>
Date: Mon, 2 Mar 2009 15:16:08 -0500
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Hey gang,

We have a few machines running Xen. For the purposes of this question they're laid out this way:

machine 1 => guest 1

machine 2 => guest 2

(both guests are stored using LVM on their respective machines)

I scp'd a file from guest 1 to guest 2 and had a transfer speed of around 288 Mb/s. Nothing unexpected there.

Then I scp'd a file from machine 2 to guest 2 and saw a transfer speed of around 1.2 Mb/s. This is extremely surprising. I would have expected much faster transfer speed primarily because it's doesn't have to travel through the network.

Can you guys lend any insight to this?


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