* [linux-lvm] persistent value of tunables for dmsetup --target=cache ? @ 2015-04-21 8:58 nikhil 2015-04-22 9:48 ` Zdenek Kabelac 0 siblings, 1 reply; 3+ messages in thread From: nikhil @ 2015-04-21 8:58 UTC (permalink / raw) To: linux-lvm 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! :) ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [linux-lvm] persistent value of tunables for dmsetup --target=cache ? 2015-04-21 8:58 [linux-lvm] persistent value of tunables for dmsetup --target=cache ? nikhil @ 2015-04-22 9:48 ` Zdenek Kabelac 2015-04-22 14:25 ` Mike Snitzer 0 siblings, 1 reply; 3+ messages in thread From: Zdenek Kabelac @ 2015-04-22 9:48 UTC (permalink / raw) To: LVM general discussion and development 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. Zdenek ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [linux-lvm] persistent value of tunables for dmsetup --target=cache ? 2015-04-22 9:48 ` Zdenek Kabelac @ 2015-04-22 14:25 ` Mike Snitzer 0 siblings, 0 replies; 3+ messages in thread From: Mike Snitzer @ 2015-04-22 14:25 UTC (permalink / raw) To: nikhil; +Cc: LVM general discussion and development 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. ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2015-04-22 14:25 UTC | newest] Thread overview: 3+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2015-04-21 8:58 [linux-lvm] persistent value of tunables for dmsetup --target=cache ? nikhil 2015-04-22 9:48 ` Zdenek Kabelac 2015-04-22 14:25 ` Mike Snitzer
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