[LU-1408] single client's performance regression test

• Type: Bug
• Resolution: Fixed
• Priority: Blocker
• Fix Version/s: Lustre 2.3.0, Lustre 2.6.0
• Environment: lustre-2.2, b2_1 and lustre-1.8.7; CentOS6.2 on both servers and clients
• Severity: 3
• Assignee: Hongchao Zhang
• Reporter: Shuichi Ihara (Inactive)

Description

This is a single client performance regression on 2.2 compared to 2.1.2 or 1.8.x.

I filed LU-744 before for another single client's performance regression, but that regression also happened on 2.1.x as well as 2.2 when the amount of file size is larger than client's memory size.

So, this regression might not be related to LU-744, but there is an another regression on 2.2 even if amount of file size is smaller than client's memory size.

Issue Links

• is related to: LU-969 2.1 client stack overruns
• is related to: LU-1413 difference of single client's performance between b2_1 and 2.1.2RC0
• is related to: LU-744 Single client's performance degradation on 2.1