[LU-10781] FLR: Add a test case to sanity-flr to test system behavior when ost fail during reading

• Type: Improvement
• Resolution: Unresolved
• Priority: Minor
• Affects Version/s: Lustre 2.11.0
• Labels: FLR2
• Assignee: Sarah Liu
• Reporter: Sarah Liu

Description

Similar to sanity-flr test_33, but test the system behavior when 1 OST fails during reading.

Step:
1. similar to test_33, generate a file with 2 mirrors which have different contents (ost1 and ost2)
2. when both OSTs available, start reading the file in background and record the contents to a output file
3. fail OST2
4. check the output file, it should contain both contents from OST1 (which is ost1) and OST2 (which is ost2)