[LU-3018] small reads occur during bulk writes hurting overall performance

• Type: Bug
• Resolution: Won't Fix
• Priority: Major
• Affects Version/s: Lustre 2.4.0
• Labels: patch
• Severity: 3
• Assignee: Cliff White (Inactive)
• Reporter: Andrew Perepechko

Description

During obdfilter-survey on OSS node or IOR write test from the client there are small reads during bulk writes which impact the performance of the OST.
Based on the block trace and dumpe2fs output these reads are for ldiskfs block bitmaps.

A patch will be uploaded shortly.