Re: [Xen-users] XEN vs GSX Server

[Michael Lang <Michael.Lang@xxxxxxxxxx>]

M.A. Williamson schrieb:
> > i've tryed both of them, and sorry yes Xen doesnt look stable for me ...
> > my expirience with Xen 3
> >
> >     +performance improvemnt
> >     +handling dom0 Bridge and VMs
> >     -memory consuming task (Java,..) are crashing not only the
> >       unprivileged Dom
> I vaguely remember this problem (or something like it) coming up on 
> the mailing list... Memory hogs in domUs should not be able to effect 
> Xen/dom0 in any way. If they can then that's a fairly horrible bug...
> Were you able to file a bugzilla for it? Does it occur on 3.0.1 or in 
> -unstable?
Versions used:
Centos 4.2
xen-3.0-x86_32-rhel4.1.src
xen-3.0-x86_32-rhel4.1.bin

CPU Athlon 2200+
1GB Ram
160 IDE Disk

the Machine was running before and is for Testing purpose. It was 
configured with Apache and mod_python for RRD Graphing,
Nagios with checks triggering mod_python SOAP Services, Sendmail, and 
all the other default things.
I created a VM with 1GB Root Disk and 20GB Data Disk (all on LVM). 
inside the VM there was nothing running except SSH and mldonkey.
Then i wanted create a second VM to move the dom0 Services inside, but 
when i started moving one service inside and running the other still outside
the machine starts getting load until nothing was working anymore. 
(nagios and apache where in pole position for this task)
I cant reproduce this behavior right now as the Machine is used for 
something else now.
for me it looks like ide and swaping and more (2) VMs and services in 
dom0 a confusing the scheduler so load gets raised until no timeslice is 
left...
Greetz mIke
> Cheers,
> Mark
>
> > my expirience with GSX 3
> >
> >     +VMs are portable between even different HostSystems (Win, Lin)
> >     +VMs dont crash HostSystem
> >     -performance not as gppd as im Xen
> >     -GuestSystem time sometimes steps much slower than real time
> >       (problem on timebased applications ...)
> >
> > there's no killer Argument for Xen and non for GSX. Both do sometimes 
> > let you know that you dont have a real machine.
> > If i should argument for one of them i would ask my boss if he wants 
> > someone to blame if something goes wrong and improvements  by droping 
> > in  cash, or maybe no real person to blame but improvments an more 
> > people to ask than VMWare can ever have.
> > the Administration Interface is not a point your boss can hook on, 
> > cause  you just need to deploy a webinterface which triggers your Xen 
> > commands and theres no need to deploy a Software Package like with 
> > VMWare. If he just doesnt want a commandline Interface he just needs 
> > some WebDesigner to wrap Pictures and many JavaScript and many .... 
> > around it ;)
> > Greetz mIke
> >
> > > Thanks,
> > >
> > >
> > >
> > > ------------------------------------------------------------------------ 
> > >
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> > > Xen-users@xxxxxxxxxxxxxxxxxxx
> > > http://lists.xensource.com/xen-users
> >
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