On Wed, Jul 13, 2005 at 04:45:57PM -0400, Ming Zhang wrote:
> On Wed, 2005-07-13 at 11:53 -0500, Brian Wolfe wrote:
> > On Wed, 2005-07-13 at 12:01 -0400, Ming Zhang wrote:
> > > On Wed, 2005-07-13 at 10:49 -0500, Brian Wolfe wrote:
> > > > I've been thinking for a while now on how to acomplish this exact idea
> > > > of a control structure for managing iscsi disks for clean backups.
> > > >
> > > > One could use simple remote commands via ssh if everything were UNIX
> > > > based. I don't know how windows handles remote calls, so i'm not the one
> > > > to work on this part. :)
> > > a generic interface provided by IET will be great. SSH will work on
> > > linux but windows will need cygwin, will be overkill i feel. a simple
> > > msg should be ok.
> > >
> > >
> > > >
> > > > Are there any existing products for ms/unix that would be ideal to use
> > > > in building something like this?
> > > cygwin+ssh is ok. but as i said, i feel it is overkill if we just use it
> > > to send several msgs.
> >
> > Agreed. I know a couple windows programmers and admins that I can query.
> > Right now with this new contract I'm not going to be able to do much
> > other than planning for the next 6 to 8 weeks. After that I can start
> > working on a web based admin system for IET. I kind of need one to
> > manage the storage cluster with my xen virtual hosts. :)
>
Do you have plans to include LVM configuration also ?
> sounds ok. http://www.openfiler.org/ looks pretty good. we are not
> filer, maybe openstorage sounds better. :P
>
"OpenStorage iSCSI server" :)
- Pasi
>
>
> Ming
>
>
> >
> > >
> > >
> > >
> > > >
> > > >
> > > > On Wed, 2005-07-13 at 10:13 -0400, Ming Zhang wrote:
> > > > > 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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>
>
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