From: Oliver Rath <rath@mglug.de>
To: LVM general discussion and development <linux-lvm@redhat.com>
Subject: [linux-lvm] Howto change cachepolicy on cached thinpool devices?
Date: Mon, 15 May 2017 15:25:11 +0200 [thread overview]
Message-ID: <61de26b1-0849-e71f-133c-a8357b773ee9@mglug.de> (raw)
Hi list,
caching the _tdata part of a thinpool works fine now. Unfortunatly with
lvchange it is not possible to change the policy (vg:dmivg,
cachepool:dmipool,thinpool:winthinpool):
# lvchange --cachepolicy cleaner dmivg/dmicache
Operation not permitted on hidden LV dmivg/dmicache.
# lvchange --cachepolicy cleaner /dev/mapper/dmivg-winthinpool_tdata
Operation not permitted on hidden LV dmivg/winthinpool_tdata.
# lvchange --cachepolicy cleaner dmivg/winthinpool
Command on LV dmivg/winthinpool does not accept LV type thinpool.
Required LV types are cache cachepool .
Command not permitted on LV dmivg/winthinpool.
The only possibility at the moment seems to change it via lowlewel
dmsetup command.
# dmsetup status dmivg-winthinpool_tdata
0 7730954240 cache 8 1458/9216 128 720896/720896 4608761 7143953 1177059
5866353 40700 761596 2993 2 metadata2 writeback 2 migration_threshold
2048 smq 0 rw -
...
How can this be done with lv*?
Tfh!
Oliver
next reply other threads:[~2017-05-15 13:25 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-15 13:25 Oliver Rath [this message]
2017-05-15 13:38 ` [linux-lvm] Howto change cachepolicy on cached thinpool devices? Zdenek Kabelac
2017-05-15 16:02 ` David Teigland
2017-05-15 20:10 ` Oliver Rath
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