Hi,
this sounds interesting, I didn´t know the -s option of lvcreate.
I have a problem with this. In my VG I haven´t free space. When I run the
command:
lvcreate -s -L 1G -n MySnap1 /dev/VolGroup00/LogVol00
Insufficient free extents (0) in volume group VolGroup00: 32 required
I have this:
/dev/mapper/VolGroup00-LogVol00
19360436 13805512 4555620 76% /home
and lvdisplay:
lvdisplay
--- Logical volume ---
LV Name /dev/VolGroup00/LogVol00
VG Name VolGroup00
LV UUID 8BRqMo-K9g5-2Pym-SZfS-Wte3-ZMvM-cqYMCv
LV Write Access read/write
LV Status available
# open 1
LV Size 19,06 GB
Current LE 610
Segments 2
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0
what can I do in this situation? I´m not an expert with LVM
Thanks
ESG
2009/7/23 Geofrey Rainey <Geofrey.Rainey@xxxxxxxxxx>
> Oh and by the way, after the dd is finished you can lvremove the snapshot
> file.
>
> -----Original Message-----
> From: redhat-list-bounces@xxxxxxxxxx [mailto:
> redhat-list-bounces@xxxxxxxxxx] On Behalf Of Geofrey Rainey
> Sent: Friday, 24 July 2009 9:16 a.m.
> To: General Red Hat Linux discussion list
> Subject: RE: backup system for RHEL
>
> I use Xen snapshot like so:
>
> 1. create a snapshot file - this can probably be quite small (depending on
> usage but 1G is probably enough)
>
> lvcreate -s -L 1G -n <name of snapshot>
> /dev/<volume_group>/<logical_volume_name>
>
> 2. then backup your partition with something like this:
>
> dd if=/dev/<volume_group>/<name of snapshot> of=<path/lvm_backup.img> bs=1M
>
> 3. if you need to restore, do the following:
>
> dd if=< path/lvm_backup.img of=/dev/<volume_group>/<logical_volume_name>
>
> Of course you'll need as much space as the original partition for this but
> that's the only solution I think.
>
>
>
> -----Original Message-----
> From: redhat-list-bounces@xxxxxxxxxx [mailto:
> redhat-list-bounces@xxxxxxxxxx] On Behalf Of ESGLinux
> Sent: Friday, 24 July 2009 12:46 a.m.
> To: General Red Hat Linux discussion list
> Subject: Re: backup system for RHEL
>
> Thanks for your answer,
> I´ll take a look at openfiler, it looks great.
>
> One question, how do I make a Xen snapshot? With vmware I see the option,
> but with Xen not.
>
> any help?
>
> thanks,
>
> ESG
>
>
> >
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