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From: "John Stoffel" <john@stoffel.org>
To: device-mapper development <dm-devel@redhat.com>
Cc: Ian Pilcher <arequipeno@gmail.com>
Subject: Re: [RFC] zodcache - auto-start dm-cache devices
Date: Fri, 18 Dec 2015 14:44:47 -0500	[thread overview]
Message-ID: <22132.25135.428253.845795@quad.stoffel.home> (raw)
In-Reply-To: <20151218185110.GA25064@agk-dp.fab.redhat.com>

>>>>> "Alasdair" == Alasdair G Kergon <agk@redhat.com> writes:

Alasdair> On Fri, Dec 18, 2015 at 12:16:32AM -0600, Ian Pilcher wrote:
>> * Is there a better way of doing this?

Alasdair> Did you try stacking LVM on top of itself first?

Alasdair> I.e. Create one cached LV consuming all your space, then create a new PV
Alasdair> and VG on top of that LV, and carve that stacked VG up into whatever LVs
Alasdair> you need?

How deep can you stack things like this before you run into problems?
And it does seem like it would put a bunch of stress on the UDEV setup
to asseble it all reliably.

John

  reply	other threads:[~2015-12-18 19:44 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-12-18  6:16 [RFC] zodcache - auto-start dm-cache devices Ian Pilcher
2015-12-18  9:44 ` Joe Thornber
2015-12-18 16:07 ` John Stoffel
2015-12-18 16:55   ` Ian Pilcher
2015-12-18 17:39     ` Ian Pilcher
2015-12-18 18:53     ` John Stoffel
2015-12-18 18:51 ` Alasdair G Kergon
2015-12-18 19:44   ` John Stoffel [this message]
2015-12-18 20:01     ` Alasdair G Kergon
2015-12-18 20:50   ` Ian Pilcher
2015-12-18 21:06     ` Zdenek Kabelac
2015-12-19  0:01       ` Ian Pilcher
2015-12-19  0:53 ` Never mind (was [RFC] zodcache - auto-start dm-cache devices) Ian Pilcher
2015-12-19  1:53   ` John Stoffel
2016-01-04 15:52     ` Joe Thornber
2016-01-06 15:49       ` Ian Pilcher

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