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Date:      Thu, 25 Apr 2002 09:21:51 +0930
From:      Greg 'groggy' Lehey <grog@FreeBSD.org>
To:        utsl@quic.net
Cc:        Miguel Mendez <flynn@energyhq.homeip.net>, freebsd-hackers@freebsd.org
Subject:   Re: graphical frontend for vinum
Message-ID:  <20020425092151.M6486@wantadilla.lemis.com>
In-Reply-To: <20020424160639.GB30203@quic.net>
References:  <20020424155218.B71155@energyhq.homeip.net> <20020424140529.GD86692@roughtrade.net> <20020424161444.A71321@energyhq.homeip.net> <20020424160639.GB30203@quic.net>

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On Wednesday, 24 April 2002 at 12:06:39 -0400, utsl@quic.net wrote:
> On Wed, Apr 24, 2002 at 04:14:44PM +0200, Miguel Mendez wrote:
>> On Thu, Apr 25, 2002 at 12:05:29AM +1000, Joshua Goodall wrote:
>>> On Wed, Apr 24, 2002 at 03:52:18PM +0200, Miguel Mendez wrote:
>>> However you present the UI, when it comes to making changes, please
>>> have it queue up the actual commands which are then visible to the
>>> sysadmin for approval, backout, single-stepping, recording etc.
>>> Way too many graphical management tools have been corrupted by the
>>> microsoft control panel &c.
>>
>> Well, if you've used recent versions of the veritas volume manager
>> fronted you'll notice that they give the cli command output in a window,
>> that's what I intend to do.
>
> You might want to look at EVMS on Linux. They have a few good ideas,
> like building a library and API underneath the user interfaces. From
> what I can see, that project has some nice underlying concepts, but the
> user interfaces need to evolve for a few years. (Worst CLI ever, and the
> GUI is very confusing.)

To be fair to the EVMS people, the tools are still evolving.  I'd
certainly like to see more documentation, though.

> I wonder if that API could interface with vinum?

I don't think so.  User interface maybe, but Vinum and EVMS have a
very different API.

> It would be very nice to have a cross-platform library interface to
> operate on disk volumes.

Yes, we've discussed that in the past.  The problem is that EVMS, AIX
LVM and Linux LVM have different objects from VERITAS and Vinum.  I
can't see an easy way of bringing them to a common denominator.  It's
hard enough explaining the two concepts in the first place.

> For that, it might even be worth improving the EVMS API, rather than
> starting from scratch.

If you want to help work on EVMS, I know people would love the help.
Personally I'd prefer to see work on Vinum, of course :-)

Greg
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