Lustre 1.6 Operations Manual

19.4.1.6 Test
A test is a configuration of a test case, which defines individual point-to-pointer
network conversation all running in parallel. A user can specify test properties, such
as RDMA operation type, source group, target group, distribution of test nodes,
concurrency of test, etc.
19.4.1.7 Batch
A test batch is a named collection of tests. All tests in a batch run in parallel. Each
test should belong to a batch; tests should not exist individually. Users can control a
test batch (run, stop); they cannot control individual tests.
19.4.1.8 Sample Script
These are the steps to run a sample LNET self-test script simulating the traffic
pattern of a set of Lustre servers on a TCP network, accessed by Lustre clients on an
InfiniBand network (connected via LNET routers). In this example, half the clients
are reading and half the clients are writing.
1. Load libcfs.ko, lnet.ko, ksocklnd.ko and lnet_selftest.ko on all test nodes and
the console node.
2. Run this script on the console node:
#!/bin/bash
export LST_SESSION=$$
lst new_session read/write
lst add_group servers 192.168.10.[8,10,12-16]@tcp
lst add_group readers 192.168.1.[1-253/2]@o2ib
lst add_group writers 192.168.1.[2-254/2]@o2ib
lst add_batch bulk_rw
lst add_test --batch bulk_rw --from readers --to servers \
brw read check=simple size=1M
lst add_test --batch bulk_rw --from writers --to servers \
brw write check=full size=4K
# start running
lst run bulk_rw
# display server stats for 30 seconds
lst stat servers & sleep 30; kill $?
# tear down
lst end_session
Chapter 19 Lustre I/O Kit 19-19