I just want to note that snapshots in LVM are reverse-differential, so
every write operation will write to every snapshot (5 snapshots, 6 write
operations instead one).
In product environment under high load this can cause a huge impact on
IO performance.
В Срд, 03/08/2011 в 17:49 +0200, Christian Motschke пишет:
> 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
> >
> > _______________________________________________
> > 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
_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users
|
Home