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Re: [linux-lvm] Could vgscan read a file of "preferred" LV name -> minor device id ?



On Fri, Jan 11, 2002 at 10:41:16AM +0000, Patrick Caulfield wrote:
> On Fri, Jan 11, 2002 at 07:11:00AM +0000, Piete Brooks wrote:
> > I'm getting complaints from NFS users that when servers reboot, they often 
> > find that their mounts have the wrong data.  I've never really worked out 
> > which end hold what in NFS FHs, but the basic idea is that a client identifies 
> > a FH which encodes (major dev id,minor dev id,inode number,version).
> > This appears to break down when a new LV is created ane the server rebooted.
> > As the /dev/<vg>/<lv> nodes are numbered strictly in the order that they are 
> > discovered, all LV minor device IDs on subsequent VGs are renumbered, so any 
> > remote caching of FHs breaks (( as with SCSI )).
> > 
> > Is that about right ?
> > 
> > Would it be possible for vgscan to read a "hints" file consisting of <vg>/<lv> 
> > and minor device number pairs ?
> > 
> > As each <vg>/<lv> is found, if it's in the file, the nominated minor device id 
> > is used; if it's not found, then the next minor device id which is not listed 
> > in the file is used.
> > 
> > [[ I use devfs, so using existing data in /dev/ would not help -- but I think 
> > it would do no harm to use that data by default ]]
> > 
> 
> I thought Heinz had fixed this in 1.0.1, what version are you using (tools &
> kernel)?

That's right. It is in since 1.0.1.

> 
> patrick
> 
> 
> _______________________________________________
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> read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html

-- 

Regards,
Heinz    -- The LVM Guy --

*** Software bugs are stupid.
    Nevertheless it needs not so stupid people to solve them ***

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Heinz Mauelshagen                                 Sistina Software Inc.
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                                                  Germany
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