Hi,
Dnia 19-04-2007 o godz. 22:42 Arno Lehmann napisał(a):
> Hi,
>
> On 4/19/2007 4:48 PM, Mariusz Czulada wrote:
> > Hello,
> >
> > I have yet another problem to solve. I didn't find similar case in
> > documentation.
> >
> > I have two separate systems in two locations (let's say "site1" and
> > "site2"). In "site1" I have local DDS5 drive and TS3310 library. In
> > "site2" server is only equiped with DDS5. Also, "Site1" is accesible
> > from "Site2" via WAN. So, "Site1" configuration looks like this:
> >
> > [...]
> >
> > We could not buy a dedicated library for "Site2", OTOH TS3310 in "site1"
> > is big enough to hold backups from both sites. So, I thought about
> > migrating jobs stored in "localfiles-2" to a library via WAN connection.
> > IHMO I should add such items:
> >
> > Site2:
> > - Director2:
> > * storage: ts3310-1 (@StorageDaemon1)
> > * pool: tapelibrary-2
> > +storage: ts3310-1
> >
> > So I could migrate locally stored jobs from "fileststem-2" to
> > "tapelibrary-2" which resides on remote ("Site1") library.
> >
> > !!!!!!
> >
> > My question is: are there any weak points in this idea?
>
> Yes...
>
> > I.e. is it
> > possible to migrate between different storage daemons?
>
> No, that's not possible. Perhaps it will be implemented some day - I
> talked with Kern about this - but I'm quite sure nobody started
> implementing this.
>
Hmm... This highly complicates my idea :/ Have to 'redesign' the whole
concepts...
BTW. If it was mentioned previously - is it possible to add "multi SD
migration" to the TODO list (question to developers, I think)? I hope
I'm not the only one to use this feature. IMHO it could be very
important in backing up multiple/distributed systems, where it is much
easier and cheaper to have one big library for long term storage then
equip every system/site with dedicated, smaller libs.
>
> > Can [slow] WAN
> > connection (some 2 Mb/s I think) affect backup reliability?
>
> Not reliablility itself, but the duration of the jobs alone makes them
> more easily affected by network problems.
>
I keep it in mind, but was thinking rather about possibiliy of problems,
when "feeding SD with data" is [probably] slower then a library/drive
speed.
> > !!!!!!
> >
> > Any comments and suggestions are gratly appreciated.
> >
> > Regards,
> >
> > Mariusz Czulada
>
> Arno
>
Mariusz
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