Re: Discussion: performance issue on event activation mode
Martin Wilck <[email protected]>
| Newsgroups | gmane.linux.lvm.general |
|---|---|
| Message-ID | <[email protected]> |
On Tue, 2021-09-28 at 17:16 +0200, Martin Wilck wrote: > On Tue, 2021-09-28 at 09:42 -0500, David Teigland wrote: > > > > > Firstly, with the new devices file, only the actual md/mpath device > > will > > be in the devices file, the components will not be, so lvm will > > never > > attempt to look at an md or mpath component device. > > I have to look more closely into the devices file and how it's > created > and used. > > > Otherwise, when the devices file is not used, > > md: from reading the md headers from the disk > > mpath: from reading sysfs links and /etc/multipath/wwids > > Ugh. Reading sysfs links means that you're indirectly depending on > udev, because udev creates those. It's *more* fragile than calling > into > libudev directly, IMO. Bah. Mental short-circuit. You wrote "sysfs symlinks" and I read "/dev/disk symlinks". Sorry! Then, I'm not quite sure what symlinks you are talking about though. Martin _______________________________________________ linux-lvm mailing list [email protected] https://listman.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/