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xen-users
Re: [Xen-users] Best practice for Dom0
Okay,
I will try less general answers to your very general questions:
Michael Lessard schrieb:
Hi everybody !
I would like to know what are the good practice in Dom0 utilisation ...
- Does it prefer that i use Dom 0 only for Xen Hypervisor ?
It can e. g. depend on the load you want to place on the domUs and the
file system. I am running domUs off LVM devices (with LVM in dom0) and
found it to make that more reliable if dom0 does not make much itself
AND is dedicated a cpu (on smp servers).
That is a load dependent issue. If your domUs are bored altogether or
make their cpu share run wild at different times, you might not find any
problems with LVM.
It especially is a problem when you use the snapshot feature of LVM
(which is so handy that I still use it despite those problems).
In general you could say: If your domUs do things that put work on dom0
(like using LVM partitions in my case) you might be better off not to
use dom0 for anything else.
- If yes, how much ram i need to reserv for Dom0 ?
I have run dom0 without LVM snapshots with 64 MB of RAM (on Debian Sarge
stable with a very basic install). With LVM snapshots they need 256 MB
at least.
Dirk
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