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From: wysochanski@sourceware.org To: lvm-devel@redhat.com, lvm2-cvs@sourceware.org Subject: LVM2 doc/example.conf man/lvm.conf.5 Date: Mon, 04 Feb 2008 20:26:00 -0000 [thread overview] Message-ID: <20080204202614.17301.qmail@sourceware.org> (raw) CVSROOT: /cvs/lvm2 Module name: LVM2 Changes by: wysochanski@sourceware.org 2008-02-04 20:26:14 Modified files: doc : example.conf man : lvm.conf.5 Log message: Fix default preferred_names filter to use /dev/mapper/mpath devices. If these devices exist, we should be using them for multipath rather than any underlying device names. Reference: http://kbase.redhat.com/faq/FAQ_96_11196.shtma bz195685 Patches: http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/doc/example.conf.diff?cvsroot=lvm2&r1=1.33&r2=1.34 http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/man/lvm.conf.5.diff?cvsroot=lvm2&r1=1.20&r2=1.21 --- LVM2/doc/example.conf 2008/01/09 15:32:19 1.33 +++ LVM2/doc/example.conf 2008/02/04 20:26:14 1.34 @@ -23,9 +23,11 @@ # same block device and the tools need to display a name for device, # all the pathnames are matched against each item in the following # list of regular expressions in turn and the first match is used. - preferred_names = [ ] + # If device-mapper multipath is used, we should always use the mpath + # devices rather than the underlying paths. + preferred_names = [ "^/dev/mapper/mpath" ] - # preferred_names = [ "^/dev/mpath/", "^/dev/[hs]d" ] + # preferred_names = [ "^/dev/mapper/mpath", "^/dev/[hs]d" ] # A filter that tells LVM2 to only use a restricted set of devices. # The filter consists of an array of regular expressions. These --- LVM2/man/lvm.conf.5 2007/11/09 16:51:54 1.20 +++ LVM2/man/lvm.conf.5 2008/02/04 20:26:14 1.21 @@ -84,7 +84,10 @@ \fBpreferred_names\fP \(em List of patterns compared in turn against all the pathnames referencing the same device in in the scanned directories. The pathname that matches the earliest pattern in the list is the -one used in any output. +one used in any output. As an example, if device mapper multipathing +is used, the following will select multipath device names: +.br +\fBdevices { preferred_names = [ "^/dev/mapper/mpath" ] }\fP .IP \fBfilter\fP \(em List of patterns to apply to devices found by a scan. Patterns are regular expressions delimited by any character and preceded @@ -98,6 +101,7 @@ device is accepted; otherwise if any name matches any \fBr\fP pattern it is rejected; otherwise it is accepted. As an example, to ignore /dev/cdrom you could use: +.br \fBdevices { filter=["r|cdrom|"] }\fP .IP \fBcache_dir\fP \(em Persistent filter cache file directory.
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