[dm-devel] [RFC] zodcache - auto-start dm-cache devices

[John Stoffel]

>>>>> "Alasdair" == Alasdair G Kergon <agk at 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