Multi-node IOR benchmark on Chameleon

[ChristopherHogan]

We want to model a checkpoint/restart workload.

• 4 client nodes, with 40 ranks each (out of 48)
• 4 PFS server nodes (HDD)
• 2 BB server nodes (SSD)
• Run Hermes as a daemon
• Run ior -w to simulate a checkpoint
• Run ior -r to simulate a restart
• For the baseline, the checkpoint phase will exit once the data is flushed to PFS, and the restart phase will read from PFS.
• Hermes will store the checkpoint in the hierarchy and we should see faster write and read.