[ADSM-L] Fwd: [ADSM-L] Tangent: ESX, Linux, and Backups

Nick,

are you aware that Oracle has ALTER DATABASE SUSPEND/RESUME and DB2 has SET
WRITE SUSPEND/RESUME for DATABASE ? These allow you to stop io while you
take a snapshot, and resume afterwards.
I assume any mature  DBMS would have something similar to these.

Regards

Steve

Steven Harris
TSM SME
Canberra Australia


On 1 March 2014 06:33, Michael Prix <mp AT rs6000.darktech DOT org> wrote:

> Hello Nick,
>
> well, if you use the TDP for VE, or "backup vm", then the
> pre-freeze/post-thaw is what you want.
> These scripts are invoked by the vmware-tools, which must be installed
> in the vm.
> http://support.unitrends.com/ikm/questions.php?questionid=1241
>
> --
> Mit freundlichen Grüßen / kind regards
>
> Michael Prix
>
> On 02/28/2014 07:08 PM, Nick Laflamme wrote:
> > What B/A client? :-)
> >
> > If I take my backups at the ESX level, I'm trying to do just an image
> > backup, driven by ESX, not using some client in the virtual machine.
> >
> > So, I need Linux to catch the signal from ESX of an impending snapshot,
> and
> > I need a way for Linux to trigger those pre- and post- command scripts.
> > That is my goal.
> >
> > On Friday, February 28, 2014, Michael Prix <mp AT rs6000.darktech DOT org>
> wrote:
> >
> >> Nick,
> >>
> >> if you don't have a TDP for the app, you can still use the
> >> PRESCHEDCOMMAND and POSTSCHEDCOMMAND options of the B/A-client.
> >>
> >> if you have a VM, the VMware-API gives you a similar hook:
> >> **/usr/sbin/pre-freeze-script
> >> /usr/sbin/post-thaw-script
> >>
> >> --
> >> Mit freundlichen Grüßen / Kind regards
> >>
> >> Michael Prix
> >>
> >> On 02/28/2014 03:14 PM, Nick Laflamme wrote:
> >>> I apologize for introducing a tangent, but I need some help defining a
> >>> problem.
> >>>
> >>> Those of us who have studied (or used!) TSM for VE know that the TDP
> for
> >>> SQL Server can receive a signal from Windows Server that something is
> >> about
> >>> to take a backup. The same signal should trigger any pending writes
> >> before
> >>> something takes a snapshot and then backs up a restorable disk image.
> >>>
> >>> Are there similar signals (which might not be the right word) in Linux
> or
> >>> various UNIX systems? Assuming a lack of support from an application
> >>> vendor, I'd want at least to fire off a script upon receiving that
> signal
> >>> to use existing commands to "freeze" the app,
> >>>
> >>> Are there better idioms I should use with my Linux/UNIX gurus, or is
> this
> >>> simply not an option yet?
> >>>
> >>> Thanks,
> >>> Nick
>