What do partition keys provide on InfiniBand?
Why C is the answer
Isolation between tenants
PKeys work somewhat like VLANs.
In detail
- PKeys isolate tenants, somewhat like VLANs.
- PKeys work somewhat like VLANs.
Use case
An illustrative scenario, not a real incident.
Two tenants share an InfiniBand fabric, separated by partition keys.
See it in different ways
flowchart TD A["Fabric"] --> B["PKey for tenant A"] A --> C["PKey for tenant B"] B --> D["Hosts of A only"] C --> E["Hosts of B only"]
mindmap
root((Multi-tenancy))
Ethernet
BGP-EVPN
VXLAN overlay
InfiniBand
Partition keys
Membership typemindmap
root(("InfiniBand fabric"))
n1["PKey A"]
n2["Tenant A hosts"]
n3["PKey B"]
n4["Tenant B hosts"]Key point: PKeys isolate tenants.
Why the other options are wrong
- A. Larger MTU values
- They do not change MTU.
- B. More switch ports
- They add no ports.
- D. Faster transceivers
- They add no speed.