On InfiniBand, how is traffic separated for QoS?
Why C is the answer
Service levels mapped to virtual lanes
SL-to-VL mapping shares a link between classes.
In detail
- SL-to-VL mapping shares a link between classes.
- SL-to-VL mapping shares a link.
Use case
An illustrative scenario, not a real incident.
Storage and compute share a link, on different virtual lanes.
See it in different ways
mindmap
root((InfiniBand))
Control
Subnet manager
Traffic
Service levels
Virtual lanes
Adaptive routing
Performance
SHARP
Fat tree
Management
UFMflowchart LR S0["Service level"] --> S1["Virtual lane"] --> S2["Share of the link"]
Key point: Service levels map to virtual lanes.
Why the other options are wrong
- A. A separate subnet manager for each class
- One SM serves a subnet.
- B. DSCP values in the BMC configuration
- DSCP is for IP, and a BMC is unrelated.
- D. Separate power feeds for each tenant
- Power is unrelated.