On 10/04/2018 00:51, Nick Savva wrote:
Hi all,
Apologies in advance if this has been covered already in discussions.
I'm building a new spectrum scale cluster and I am trying to get consistent device
names across all nodes. I am attempting to use aliases in the multipath.conf which
actually works and creates the /dev/mapper/<disk name> link.
I understand you can also copy the bindings file but I think aliases is
probably easier to maintain.
However Spectrum scale will not accept the /dev/mapper device it only looks for
dm-X devices that are in the /proc/partitions file. I know SONAS is pointing to
Device mapper so there must be a way?
Im looking at the /var/mmfs/etc/nsddevices is it a case of editing this file to
find the /dev/mapper device?
Hello,
We're doing this, indeed, using the "nsddevices" script.
The names printed by the script must be relative to "/dev".
Our script contains the following (our multipath aliases are "nsdXY"):
cd /dev && for nsd in mapper/nsd* ; do
[ -e $nsd ] && echo "$nsd dmm"
done
return 0
The meaning of "dmm" is described in "/usr/lpp/mmfs/bin/mmdevdiscover".
Loïc.
--
| Loïc Tortay <[email protected]> - IN2P3 Computing Centre |
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