We have a azure migration coming in , in order to migrate from linux to azure system they would like us to stop multipathing on Linux.

So the question is

how can we disable multipathing ?

what effect it would have on the production linux server ?

I saw "multipath -ll" giving output of 6 mpath, should I use "multipath -f mpatha" and so on so forth ??

or should use "multipath -F" ?? to disable all the devices at once ?

Or let me know if there is a proper procedure to achieve this task ??

Is it possible to make a change with out taking downtime ??

Thanks

Please ask "them" what "they" mean by "stop multipath".

multipath -f mpatha will undo a single path mpatha. It doesn't disable multipathing, since the multipathd continues to run in the background, detecting multipaths. Same for multipath -F. Also note that multipaths don't exist for their own sake; they have logical volumes, filesystems etc. on them. Before you undo them, you therefore have to stop/reconfigure/do something with the consumers of those multipaths.

On most (all?) enterprise Linux distros, you stop a service with systemctl stop SERVICENAME, for example systemctl stop multipath, then disable it (i.e. ensure it does not get started at system startup) with systemctl disable multipath. This ensures that no paths are detected, but it doesn't necessarily affect currently running paths.

Again, my recommendation is to first find out what "stop multipath" is supposed to mean, then to deal with whatever data exists on your multipaths.

We will surely ask them but for the of understanding does stopping multipath will affect on PV level ? because we have lv on it and concerned about the data and filesystem We have in the PV.

If your PV was created on /dev/mapper/mpatha, and you make mpatha disappear, I would guess that it affects your PV, thus the LVs that are on it.