User Manual

Figure 7: Example QoS Deployment on InfiniBand Subnet
OpenSM – Subnet ManagerRev 2.2-1.0.1
Mellanox Technologies
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8.7 QoS Configuration Examples
The following are examples of QoS configuration for different cluster deployments. Each exam-
ple provides the QoS level assignment and their administration via OpenSM configuration files.
8.7.1 Typical HPC Example: MPI and Lustre
Assignment of QoS Levels
• MPI
• Separate from I/O load
• Min BW of 70%
• Storage Control (Lustre MDS)
• Low latency
• Storage Data (Lustre OST)
• Min BW 30%
Administration
• MPI is assigned an SL via the command line
host1# mpirun –sl 0
• OpenSM QoS policy file
In the following policy file example, replace OST* and MDS* with the real port
GUIDs.
qos-ulps