Re: [Xen-users] XEN infrastructure setup question

[Christian Motschke <christian@xxxxxxxxxxx>]

Am 03.08.2011 um 17:01 schrieb Javier Guerra Giraldez:

> On Sat, Jul 30, 2011 at 1:39 AM, Abilash Praveen [Consign IT Private
> Limited] <abilash@xxxxxxxxxxxxxx> wrote:
>> 1) How many VMs can I run?
> 
> unanswerable, as it totally depends on your needs.  the box is on the
> smallish side, however.
> 
>> 2) How do I go about LVM and also use RAID 1?
> 
> do a RAID, then set it as a PV, create a VG, then split on your LVs

Or put 2 PVs in 1 VG and create the LVs as mirror (lvcreate -m 1 …)

> 
>> 3) How do I backup VMs (snapshots?)
> 
> install backup clients on the VMs

Or you can make a snapshot, check the filesystem of the snapshot, mount the 
snapshot and use a backup tool or dd the snapshot to another disk. You can find 
backup scripts for this.
http://www.cduce.org/~abate/files/xenBackup.txt

> 
>> 4) I am also looking at Eucalyptus for future offering. My understanding is
>> that with Eucalyptus, I can group different bare metals into a single cloud
>> - i.e, 2 x quad core process, 2 x 8 GB RAM will now become a 2 quad core
>> with 16 GB RAM cloud and the VMs can be installed into this cloud. Please
>> correct me if I'm wrong.
> 
> 'cloud' isn't a magic word.  Eucalyptus just simplifies management and
> resource allocation.  Each VM still reside on a single box, but if
> done correctly you don't have to care exactly which.
> 
> -- 
> Javier
> 
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