[pve-devel] KVM live migration limited to SSH speed

Dietmar Maurer dietmar at proxmox.com
Thu Nov 1 17:42:15 CET 2012


http://www.psc.edu/index.php/hpn-ssh

> -----Original Message-----
> From: pve-devel-bounces at pve.proxmox.com [mailto:pve-devel-
> bounces at pve.proxmox.com] On Behalf Of Stefan Priebe - Profihost AG
> Sent: Donnerstag, 01. November 2012 14:23
> To: pve-devel at pve.proxmox.com
> Subject: [pve-devel] KVM live migration limited to SSH speed
> 
> Hello list,
> 
> right now with the latest patches, a tuned ciphers list and openssl aes-ni
> support i'm able to migrate whole vm's with 100% memory usage with
> 75MB/s instead of 41MB/s.
> 
> But this is still limited to the max speed i get with scp over 10GBE CPU bound.
> As i use a seperated LAN for cluster and pve communication i can trust the
> network to be secure.
> 
> What are the possibilites to speed this up?
> 
> Stefan
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