On Mon, Feb 25, 2019 at 1:09 PM Roman Szabados <[email protected]> wrote:
> Dear All, > > Updated question: Is it possible to configure the "N" parameter supplied > by linstor for --max-peers "N"? > > As far as i understand it now, linstor uses "--max-peers 7" as an fixed > argument, which substantialy limits the DRBD capability to handle up to 31 > peers. > Thank you. > > Best regards > > Roman Szabados > > On 2/22/19 2:45 PM, Roman Szabados wrote: > > Dear All, > > In our use case, we need to have up to 16 peers sharing the same resource > and snapshot, which is later used on all hypervisors to build the actual > specific VM from the snapshot. But after trying to add more than the 8th > node, i get this error message: > > root@dagobah:~# linstor r c alderaan felucia kessel vm-base-1804-system > --storage-pool ssd-pool > ERROR: > Description: > *Resource on node bespin has insufficient peer slots to add another > peer* > Details: > Node(s): 'alderaan', 'felucia', 'kessel', Resource: > 'vm-base-1804-system' > Show reports: > linstor error-reports show 5C28F669-00000-000115 > root@dagobah:~# > > I do assume, that this is a limitation of Linstor. Can this limit be > configured to accept more than 8 nodes per ressource in Linstr? > Thank you. > > Roman Szabados > > On 2/21/19 10:39 AM, Roland Kammerer wrote: > > On Wed, Feb 20, 2019 at 02:35:16PM +0530, Malhar vora wrote: > > Hi Experts, > > Does anyone know how many nodes can be supported for DRBD ? > > Can DRBD support count like 1000+ nodes ? > > What Robert wote, plus: > > IMO the important thing here is "at the same time or not" and "1000 > times redundant"? The second one is easy, it does not make sense. For > the first one: Usually you make resource available 2 or 3 times > redundant (every bit is also on 1 or 2 different servers). And then you > have like a ton of hypervisors. But only one connects to the storrage > at a given point in time. Or 2 because of live migration. These > hypervisors would be diskless clients, that connect to the storage via > network only. And if they don't need it anymore, another diskless client > accesses the data. Most of our plugins that integrate DRBD/LINSTOR with > other platforms like k8s, openstack, opennebula,... do exactly that: > They create storage N-times redundant and create/delete diskless > assignments on demand. So yes, conceptually you then can have 1000 > nodes. > > Regards, rck > _______________________________________________ > drbd-user mailing > [email protected]http://lists.linbit.com/mailman/listinfo/drbd-user > > > _______________________________________________ > drbd-user mailing > [email protected]http://lists.linbit.com/mailman/listinfo/drbd-user > > _______________________________________________ > drbd-user mailing list > [email protected] > http://lists.linbit.com/mailman/listinfo/drbd-user > Hello, for existing resources you cannot change this option as it would require a recreation of the metadata. For new resources, you can set a property on the corresponding resource-definition: linstor rd sp <resource-name> PeerSlotsNewResource 31 Regards, Gabor
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