I don't think this is correct, TSM for Virtual Environments (and even just
the BA client with a simple full backup) will only backup the blocks that
are in use inside the .vmdk file, this information is provided by the
vSphere storage API.
On Tue, Jul 9, 2013 at 3:15 AM, Stackwick, Stephen <
Stephen.Stackwick AT icfi DOT com> wrote:
> According to this:
>
>
> http://www-01.ibm.com/support/docview.wss?uid=swg21641914&myns=swgtiv&mynp=OCSS8TDQ&mync=E
>
> TSM4VE backs up the whole disk. And that's been my experience.
>
> Steve
>
> STEPHEN STACKWICK | Senior Consultant | 301.518.6352 (m) |
> Stephen.Stackwick AT icfi DOT com | icfi.com
> ICF INTERNATIONAL | 410 E. Pratt Street Suite 2214, Baltimore, MD 21202 |
> 410.539.1135 (o)
>
> > -----Original Message-----
> > From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf
> > Of Robert Ouzen
> > Sent: Monday, July 08, 2013 8:58 AM
> > To: ADSM-L AT VM.MARIST DOT EDU
> > Subject: [ADSM-L] FW: [ADSM-L] Should CBT be enabled before using TSM for
> > VE to save space?
> >
> > Hi Wanda
> >
> > No quite sure at least in Vsphere 5 (maybe Vsphere 5.1) , I always check
> with the
> > command: dsmc show VM all and the parameter : changeTracking: Off
> >
> > About the first backup will take only the USED space , at least in my
> environment
> > some machines works fine but some others backup the ALL space !!!
> >
> > Best Regards
> >
> > Robert
> >
> > -----Original Message-----
> > From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf
> > Of Prather, Wanda
> > Sent: Monday, July 08, 2013 3:47 PM
> > To: ADSM-L AT VM.MARIST DOT EDU
> > Subject: Re: [ADSM-L] Should CBT be enabled before using TSM for VE to
> save
> > space?
> >
> > If your VM's were created in VSphere 5, CBT will be on by default.
> >
> > My understanding is that either way (starting with CBT on or off), you
> should
> > only get USED space on the first backup.
> >
> >
> > -----Original Message-----
> > From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf
> > Of Michael Roesch
> > Sent: Monday, July 08, 2013 4:29 AM
> > To: ADSM-L AT VM.MARIST DOT EDU
> > Subject: [ADSM-L] Should CBT be enabled before using TSM for VE to save
> > space?
> >
> > Hi there,
> >
> > I've read here http://www-01.ibm.com/support/docview.wss?uid=swg21608413
> > that TSM for VE is using "content-aware" backup, if CBT is enabled. It
> also says
> > that TSM for VE will enable CBT after the first backup.
> >
> > So I'm wondering if enabling CBT before performing the first backup would
> > make TSM for VE backup only the used blocks (i.e. used space) and hence
> would
> > save space on the storage pool?
> >
> > Or would TSM for VE still backup the full VMDK, including possible lots
> of unused
> > space inside it on the first backup?
> >
> > Regards,
> > Michael
>
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