From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Wed, 22 Apr 2015 10:25:15 -0400
From: Mike Snitzer <snitzer@redhat.com>
Message-ID: <20150422142515.GA4468@redhat.com>
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Subject: Re: [linux-lvm] persistent value of tunables for dmsetup
	--target=cache ?
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To: nikhil <nkshirsagar@gmail.com>
Cc: LVM general discussion and development <linux-lvm@redhat.com>

On Wed, Apr 22 2015 at  5:48am -0400,
Zdenek Kabelac <zkabelac@redhat.com> wrote:

> Dne 21.4.2015 v 10:58 nikhil napsal(a):
> >Hello,
> >
> >how do I ensure that the tunable (for eg. dmsetup message vg02-jetcache_lv 0
> >write_promote_adjustment 0) will remain the same value even after reboot?
> >
> >Seems like the tunables values reset to earlier values upon reboot of the
> >machine.
> >
> >Help! :)
> 
> 
> By using them, when you create/load  dm table for your cache target.

Best to use lvm2 to create/configure/tune dm-cache.  Otherwise, if
you're just using the dmsetup interface directly you won't have your
tunings persist.