backup system for RHEL
ESGLinux
esggrupos at gmail.com
Fri Jul 24 10:10:43 UTC 2009
2009/7/24 TYURIN Aleksey <Aleksey.TYURIN at raiffeisen.ru>
> Hi
>
> To create the snapshot you need to have enough unpartitioned space in LVM
> value group.
> Alternatively, you can take this space from exists LVM-logical volume to
> valume group
>
> umount /dev/VolGroup00/LogVol00
>
> resize_reiserfs -s-1G /dev/VolGroup00/LogVol00
> (for riserfs)
> or
> resize2fs /dev/VolGroup00/LogVol00 18G
> (for ext3)
>
> lvreduce -L-1G /dev/VolGroup00/LogVol00
> mount /dev/VolGroup00/LogVol00
>
> Can you show?:
> vgdisplay
>
yes of course:
vgdisplay
--- Volume group ---
VG Name VolGroup00
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 6
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 1
Open LV 1
Max PV 0
Cur PV 2
Act PV 2
VG Size 19,06 GB
PE Size 32,00 MB
Total PE 610
Alloc PE / Size 610 / 19,06 GB
Free PE / Size 0 / 0
VG UUID nlbCIt-jUrq-d0qk-pnN8-tM90-B3w1-0vVVEL
The fs is ext3.
I´m going to try to reduce the filesystem as you suggested.
One thing, what happens If I dont use LVM at all, (I have a lot of system
with out it). How can I make a snapshot of a Xen Image?
Greetings,
ESG
>
>
> ??
>
> -----Original Message-----
> From: redhat-list-bounces at redhat.com [mailto:
> redhat-list-bounces at redhat.com] On Behalf Of ESGLinux
> Sent: Friday, July 24, 2009 10:40 AM
> To: General Red Hat Linux discussion list
> Subject: Re: backup system for RHEL
>
> 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 at tvnz.co.nz>
>
> > Oh and by the way, after the dd is finished you can lvremove the
> > snapshot file.
> >
> > -----Original Message-----
> > From: redhat-list-bounces at redhat.com [mailto:
> > redhat-list-bounces at redhat.com] 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 at redhat.com [mailto:
> > redhat-list-bounces at redhat.com] 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
> >
> >
> > >
> > --
> > redhat-list mailing list
> > unsubscribe mailto:redhat-list-request at redhat.com?subject=subscribe
> > https://www.redhat.com/mailman/listinfo/redhat-list
> > ==========================================================
> > For more information on the Television New Zealand Group, visit us
> > online at tvnz.co.nz
> > ==========================================================
> > CAUTION: This e-mail and any attachment(s) contain information that
> > is intended to be read only by the named recipient(s). This
> > information is not to be used or stored by any other person and/or
> organisation.
> >
> >
> > --
> > redhat-list mailing list
> > unsubscribe mailto:redhat-list-request at redhat.com?subject=unsubscribe
> > https://www.redhat.com/mailman/listinfo/redhat-list
> > ==========================================================
> > For more information on the Television New Zealand Group, visit us
> > online at tvnz.co.nz
> > ==========================================================
> > CAUTION: This e-mail and any attachment(s) contain information that
> > is intended to be read only by the named recipient(s). This
> > information is not to be used or stored by any other person and/or
> organisation.
> >
> >
> > --
> > redhat-list mailing list
> > unsubscribe mailto:redhat-list-request at redhat.com?subject=unsubscribe
> > https://www.redhat.com/mailman/listinfo/redhat-list
> >
> --
> redhat-list mailing list
> unsubscribe mailto:redhat-list-request at redhat.com?subject=subscribe
> https://www.redhat.com/mailman/listinfo/redhat-list
>
> -----------------------------------
> This message and any attachment are confidential and may be privileged or
> otherwise protected from disclosure. If you are not the intended recipient
> any use, distribution, copying or disclosure is strictly prohibited. If you
> have
> received this message in error, please notify the sender immediately either
> by telephone or by e-mail and delete this message and any attachment from
> your system. Correspondence via e-mail is for information purposes only.
> ZAO Raiffeisenbank neither makes nor accepts legally binding statements by
> e-mail unless otherwise agreed.
> -----------------------------------
>
> --
> redhat-list mailing list
> unsubscribe mailto:redhat-list-request at redhat.com?subject=unsubscribe
> https://www.redhat.com/mailman/listinfo/redhat-list
>
More information about the redhat-list
mailing list