[Drbd-dev] Re: drbd in linux-ha cvs

[Philipp Reisner]

> > > waere es sinnvoll sowas zu haben:
> > >
> > > drbdadm dump_meta_data r0 (oder info oder wie immer wir das nennen
> > > wollen)
> > >
> > > output would be bash sourceable:
> > > GEN_COUNT=SOME:LONGER:STRING:WITH:NUMBERS:AND:STUFF
[...]
> > Ideas:
> >  1) We move the read_gc.pl/write_gc.pl to the user directory.
> >  2) Make them to one C program: drbdmeta
> >     -> in the future the module never creates the meta data
> >        block. One can use drbdmeta to create, read and
> >        modify the drbdmeta block. drbdmeta refuses to write
> >        to it as long as the module is loaded (configured).
> >  3) drbdadm is the nice frontend to drbdmeta is it is to
> >     drbdsetup.
[...]
> > So with continuing the current way of doing things, I would
> > extend the interface in this way:
> >
> > drbdadm md-set-gc 1:2:3:4:5:6 r0
> > drbdadm md-get-gc 1:2:3:4:5:6 r0
> > drbdadm md-get/set-{la-size|consistent|etc...} resources....
> > drbdadm md-create r0
[...]
> I do NOT want to make it easy to _modify_ on-disk meta data.
> if it is too easy (or even documented), people will screw up,
> and blame us for it.
>

Right! All (at least most) of the "set" methods must be undocumented. 
(And not visible in the usage)

-Philipp
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