Dell EMC Unity driver in cinder documentation multipath config
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
Cinder |
New
|
Undecided
|
Unassigned |
Bug Description
The doc says to set below config below in default section of mpath conf.
~~~
defaults {
user_
}
~~~
So find_multipaths is set to "no".
which creates multipath devices for every single block device even if there is only single path including local disks.
When `find_multipaths yes` is set, mpathd creates mpath devices if
- if there are atleast 2 non blacklisted path to a LUN
- user manually creates it
- A path has the same WWID as a multipath device that was previously created (even if that multipath device does not currently exist).
Also for local disks or LUNs which only have one physical path creating a dm device seems like adding an extra layer. Is there any benefit to setting `find_multipath
Config reference :
~~~
https:/
~~~
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-------
Release: on 2019-01-10 10:26:39
SHA: dbb2e7799dd43cc
Source: https:/
URL: https:/