[LU-10665] DoM: append to file causes OST component initialization

• Type: Technical task
• Resolution: Duplicate
• Priority: Major
• Labels: DoM2
• Assignee: Mikhail Pershin
• Reporter: Mikhail Pershin

Description

Append test for DoM files shows bad results after some changes in LOV/LOD. It causes OST component initialization with OST objects creation. That has bad effect on append itself but also makes impossible other optimizations for DoM file even when its size is still small.

DOM files append:

## ./smalliomany -a /mnt/lustre/dp_dom/file- 16384 300 
## 2018-01-28 19:04:36: START
total: append 33758741 bytes in 94 seconds: 359135.54 bytes/second
----- MDC RPCs: 163800
----- OSC RPCs: 16392 <--- that is wrong behavior

Issue Links

• duplicates: LU-9341 PFL: append should not instantiate full layout
• is related to: LU-13420 append to PFL-file without 'eof' component fails