From mboxrd@z Thu Jan  1 00:00:00 1970
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
In-reply-to: Your message of "Thu, 05 Jan 2012 15:03:11 EST."
	<241a425555c280b683eeb6f2c2c819d8@chula.quanstro.net>
References: <20120105124852.GA940@polynum.com>
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	<20120105151518.GB435@polynum.com>
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	<74f17bd79e5a709683d94e72b4459623@lvoc.net>
	<20120105184858.87B0BB858@mail.bitblocks.com>
	<b063397a2a7e3544a27211ec8af5dbd6@chula.quanstro.net>
	<20120105195724.626D7B85B@mail.bitblocks.com>
	<241a425555c280b683eeb6f2c2c819d8@chula.quanstro.net>
Date: Sat,  7 Jan 2012 17:29:15 -0800
From: Bakul Shah <bakul@bitblocks.com>
Message-Id: <20120108012915.8C315B852@mail.bitblocks.com>
Subject: Re: [9fans] venti and "contrib": RFC
Topicbox-Message-UUID: 5657905a-ead7-11e9-9d60-3106f5b1d025

On Thu, 05 Jan 2012 15:03:11 EST erik quanstrom <quanstro@quanstro.net>  wrote:
> > > > venti doesn't have a "scrub" command, does it? zfs scrub was
> > > > instrumental in warning me that I needed new disks.
> > >
> > > they're using coraid storage.  all this is taken care of for them
> > > by the SR appliance.
> >
> > When are you going to sell these retail?!
> >
> > The question was for venti though.
>
> i'm not sure i follow.  why can't venti assume a perfect array-of-bytes
> device and let the appliance take care of it?

If you scrub only the live data, total scrub time becomes a
function of used space as opposed to total space.  But the
main reason for asking was that I was thinking of situations
where your appliance is not used but venti is.

The illusion of a perfect array-of-bytes abstraction can't
always be sustained in any case.

Thanks to everyone who set me straight on fossil + venti.