On Wed, 2005-07-13 at 17:07 +0300, Pasi Kärkkäinen wrote:
> On Wed, Jul 13, 2005 at 08:22:51AM -0400, Ming Zhang wrote:
> > Thanks for the link. We need a windows developer here. :P
> >
>
> VSS plugin support also requires some kind of "control daemon" to Linux to be
> able
> to easily create new lvm snaphots and make them visible in iscsitarget from
> the VSS plugin..
yes,
>
> I think that kind of lvm + iscsitarget control daemon would be good for
> Linux server snapshots too.. not only for VSS stuff.
yes, ini side assure that system is clean and thus daemon do flush and
snapshot. i knew samba has a sample script, but not generic
>
> Say you have a storage server running iscsitarget + lvm, and an
> application server running some iscsi-initiator and using disk space from
> the storage server.
>
> Now to successfully create snapshot for backup purposes (of the application
> server)
> you need to shutdown/"freeze" the applications for a while, and then tell the
> storage-server to create the snapshot.. Creating the snapshot in the storage
> server takes only couple of seconds, and after that you can again start the
> applications and do the backup from the new iscsi LUN (containing the
> snapshot) visible in the application server or in the separate
> backup-server.
> This process needs to be controller from the application server.. or from
> separete backup server.. in any case, it cannot be controller from the
> storage-server (iscsitarget).
>
> Sounds like we need a daemon for controlling the iscsitarget + lvm,
> and a library/cli-commands/scripts to control the daemon from
> initiator-boxes.. these are needed for VSS support, and for Linux support
> too..
yes.
>
> Is there anything like this in EVMS ? Or in some other project?
not heard of.
>
> - Pasi
>
> > Ming
> >
> > On Wed, 2005-07-13 at 14:29 +0300, Pasi Kärkkäinen wrote:
> > > Hi!
> > >
> > > I was searching the web for Windows 2003 VSS hardware provider drivers
> > > for Linux iscsi
> > > targets, but didn't find any.. but I found this:
> > >
> > > http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vss/base/developing_vss_hardware_providers.asp
> > >
> > > There is some documentation about developing VSS hw provider drivers for
> > > win2k3.
> > >
> > > Maybe somebody finds it usefull.. and maybe creates VSS driver for
> > > linux iscsitarget + lvm combo :)
> > >
> > > -- Pasi Kärkkäinen
> > >
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