This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
Home Products Support Community News


Re: [Xen-users] XCP bandwidth management

To: "msgbox450@xxxxxxxxx" <msgbox450@xxxxxxxxx>
Subject: Re: [Xen-users] XCP bandwidth management
From: Scott Damron <sdamron@xxxxxxxxx>
Date: Fri, 20 May 2011 11:48:37 -0500
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
Delivery-date: Fri, 20 May 2011 09:50:07 -0700
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=BSS54bA78M0eN+hY5X0bf7iA1oXrzxiMKnjAvs/PR9w=; b=naVyrOFg8lyT5eVDDhhpEHLH238srXVJRsN+fk2uFHGDfCk+GH4v6e+xJis+8HpTXK 4Zf3I0uUAR0QoZSEHJX1el60Tthg2ygrKZG6PPh/4jfj8g/JRd66Y8g3N+7uBUZR9fU4 JK0PEn37cf8s9pwRLXPxCg8a9H7eEpN4gWkx0=
Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=VMVei6WQOOKpPxduWgNlPuyfsoLFhDybsgjURhEN6S/glwIjMEX2gzbfrf2tm4vRXX FDipqNsXTOuyrpceGC9To+8RMVhHpE4Q6cchitvpxDUH6Bxmg3sQJf6YsQQc6n6/Q7ld 7XwualKM/+BH4hlX0wq7HHNk+HbVfkx4Ym7Mg=
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <BANLkTik7q4pEHUaucDbUeyYbHE1SxEz7Zw@xxxxxxxxxxxxxx>
List-help: <mailto:xen-users-request@lists.xensource.com?subject=help>
List-id: Xen user discussion <xen-users.lists.xensource.com>
List-post: <mailto:xen-users@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=unsubscribe>
References: <BANLkTik7q4pEHUaucDbUeyYbHE1SxEz7Zw@xxxxxxxxxxxxxx>
Sender: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
I would start by looking at configuring QOS on the Open VSwitch.  That
might get you where you want to be.


On Fri, May 20, 2011 at 11:38 AM, msgbox450@xxxxxxxxx
<msgbox450@xxxxxxxxx> wrote:
> Hi all,
> I've got XCP 1.0 up and running nicely and would like to use it in
> production. However I'm struggling with the concept of bandwidth management.
> It seems like such a common problem that everyone must have, but I can't
> find any clear direction in which to go.
> The dedicated host I am using (Hetzner) gives me a 5TB monthly bandwidth
> quota which needs to be shared between all the VMs on the XCP.
> Ideally I would like something to automatically manage the bandwidth such
> that each VM is capable of using the full 100mbps speed of the connection,
> but will be throttled back if the throughput is sustained, so we have e.g.
> 24 x 1GB VMs on the host with average of 213GB/month bandwidth usage each.
> Alternatively it might be easier to just route all the virtual interfaces
> though a VM than runs pfsense or use tc on the host to just set some sort of
> shaping on the physical interface itself, but I really don't know the best
> way to go about it.
> Things I've found so far aren't so good:
> 1 - Limit the interface using the XenCenter GUI... but that means the VM
> would never be able to go above about 1mbps, even if it's sat there and used
> no bandwidth for the past week and is well within its quota, so that's not
> ideal.
> 2 - Use sFlow in XCP to capture the data. Well this works for looking at how
> much bandwidth they are using, but I haven't found any existing tool that
> will act on that data to do traffic shaping.
> 3 - Use the XAPI calls to check the bandwidth usage.
> With methods 2 and 3 I guess I could write something that collects the data
> and stores it a database table, somehow work out how much the connection
> needs to be slowed by and then apply it using the XAPI, but that seems
> rather hacky and difficult and there must be a better way?
> If anyone could give some tips on how to do this I'd really appreciate it.
> Basically I just want the quickest and easiest way to make it so that the
> server as a whole doesn't go over its bandwidth limit without limiting all
> the guests to a tiny speed individually.
> Thanks!
> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users

Xen-users mailing list