Re: [Xen-users] Re: I need advice about xen project

[Aleix Dorca <adorca@xxxxxx>]

Hi Christopher,

no, I don't limit to 4 the domU's on my Xen machines, I have plenty of 
servers to spare. I have some servers running 10-12 domU's while others 
only run 1-2. Some none, I have them just in case... or for when new 
domU's needed. I have not run out of processing power but I have of RAM. 
If I had to recommend something that'd be: GET PLENTY OF RAM.
As for drbd, yes, I'm running an active/passive setup. You could say a 
machine is always misused, it's true, but I have an 'on-line' backup 
just in case. You could always use an active/active setup with a cluster 
aware file system. I tried it but I really didn't need it.
Hope it helps,

Al.

En/na christopher andrews ha escrit:
> Hey Aleix, 
>
> I notice here that you have 12 dell server running xen for your domU's, so
> does this mean your limit to 4 vm per dom0? This going out the fact that you
> have 30 to 40 domU's running in total from your first e-mail. Also I see
> that you using drbd for you iscsi san on the dell 2950's, I'm also thing
> about using this setup but I'm wonder are they 2950 running passive active
> mode because I believe that drdb can only have one device accessing the
> virtual disk interface at a time.
>
> Thank You,
> Chris
>
>
> On 8/23/09 8:08 AM, "Aleix Dorca" <adorca@xxxxxx> wrote:
>
>   
> > > Hello,
> > >
> > > I need help with a production system that I would like to design and
> > > roll
> > > out a my job. I was thinking about buy two server with 16 each and 8
> > > processor and have both server connect to two dell 2850 server with
> > > raid 6
> > > and 3x 300 ultra 320 hard drives. Both dell 2850¹s that are being
> > > used a
> > > nas server will be connected to the two new server through 1gigabit
> > > Ethernet. I wonder if this a bad Idea?
> > >       
> > Hi Christopher,
> >
> > the setup you talk about is more or less the same I'm using. I've been
> > using it in a production environment for about a year now without a
> > single problem. Here's my setup:
> >
> > 12 Dell 1950 Servers with 8 Cores and 4 to 16 Gb (depending on the
> > server)
> > 4 Dell 2950 Servers with 5 450Gb disks on RAID 5 acting as a SAN via
> > iscsi (2TB aprox each).
> >
> > The SAN servers are paired and replicated using drbd.
> >
> > As said no problems running xen 3.1 on Ubuntu and Debian DomU, and
> > running Debian and CentOS as domU.
> >
> > All network connections are 1 Gb. I have about 30~40 domU.
> >
> > Hope it helps,
> >
> > Al.
> > _______________________________________________
> > Xen-users mailing list
> > Xen-users@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-users
> >     
>
>   

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users