From: Alasdair G Kergon <agk@redhat.com>
To: device-mapper development <dm-devel@redhat.com>,
"ATARAID (eg, Promise Fasttrak,
Highpoint 370) related discussions" <ataraid-list@redhat.com>,
linux-lvm@redhat.com
Subject: [linux-lvm] Re: [dm-devel] Re: LVM on dmraid breakage
Date: Tue, 7 Aug 2007 22:50:20 +0100 [thread overview]
Message-ID: <20070807215020.GF2064@agk.fab.redhat.com> (raw)
In-Reply-To: <46B36F7A.2090601@cfl.rr.com>
On Fri, Aug 03, 2007 at 02:10:02PM -0400, Phillip Susi wrote:
> Where does lvm store state
> information right now? In conf files in /etc isn't it?
It uses an untrusted cache in /etc/lvm as hints to speed up its
processing if the hints prove to be still correct. It can't ever trust
because things can change on the system without lvm2's knowledge. And
device scanning causes us no end of problems - particularly in a
clustered environment. The new model should provide us with a
completely-reliable cache.
And why does lvm2 today have to include code to check for partition
tables, md devices, filesystems etc.?
If all these components co-operated through common interfaces there'd be
no need!
Alasdair
--
agk@redhat.com
next prev parent reply other threads:[~2007-08-07 21:50 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <46B0EAEF.6090305@cfl.rr.com>
2007-08-02 6:50 ` [linux-lvm] Re: LVM on dmraid breakage Luca Berra
2007-08-02 10:45 ` Bryn M. Reeves
2007-08-03 7:55 ` Luca Berra
[not found] ` <46B251BB.1010004@cfl.rr.com>
2007-08-03 0:40 ` [linux-lvm] Re: [dm-devel] " David Robinson
2007-08-07 21:37 ` Alasdair G Kergon
2007-08-07 21:03 ` Alasdair G Kergon
[not found] ` <46BA2FCC.1040001@cfl.rr.com>
2007-08-08 21:45 ` Alasdair G Kergon
[not found] ` <46BB4E86.7090000@cfl.rr.com>
2007-08-10 5:09 ` Luca Berra
2007-08-10 13:49 ` Alasdair G Kergon
[not found] ` <46B254E4.60700@cfl.rr.com>
2007-08-03 8:11 ` Luca Berra
[not found] ` <46B36F7A.2090601@cfl.rr.com>
2007-08-03 19:57 ` Luca Berra
[not found] ` <46B39E58.2040305@cfl.rr.com>
2007-08-04 6:50 ` Luca Berra
[not found] ` <46B733EE.4090507@cfl.rr.com>
2007-08-07 9:17 ` Luca Berra
2007-08-07 22:01 ` Alasdair G Kergon
2007-08-07 21:53 ` Alasdair G Kergon
2007-08-07 21:50 ` Alasdair G Kergon [this message]
2007-08-07 21:40 ` Alasdair G Kergon
2007-08-07 21:28 ` Alasdair G Kergon
2007-08-07 21:02 ` Alasdair G Kergon
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