On Sat, Feb 13, 2021 at 11:32:21AM +0000, Brian Candler wrote: > On 12/02/2021 18:34, Brian Candler wrote: > > In my testing, Linstor seems to create the same device node name on each > > node (e.g. `/dev/drbd1000`). > > > > My question is: is this guaranteed? e.g. is the drbd node number a > > unique, global property of the volume itself? > > I think I've answered my own question here: > > root@node1:~# linstor volume-definition list -p > +---------------------------------------------------------------+ > | ResourceName | VolumeNr | VolumeMinor | Size | Gross | State | > |===============================================================| > | my_ssd_res | 0 | 1000 | 1 GiB | | ok | > | res00 | 0 | 1001 | 1 GiB | | ok | > | res00 | 1 | 1002 | 2 GiB | | ok | > +---------------------------------------------------------------+ > > The VolumeMinor appears to be a property of the (Resource+Volume),
yes. > so I think it should be stable and consistent across all nodes where > that resource appears. yes. LINSTOR has a pool and generates a free one and remembers it. So it is consistent for that res/vol combination on all nodes. If you delete a resource/volume and generate a new one, it might reuse this now free minor again. But still, consistent on all nodes in the cluster. Regards, rck _______________________________________________ Star us on GITHUB: https://github.com/LINBIT drbd-user mailing list [email protected] https://lists.linbit.com/mailman/listinfo/drbd-user
