[LU-13151] Add parent FID to MTIME changelogs

• Type: Improvement
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.14.0
• Affects Version/s: Lustre 2.13.0
• Assignee: Nikitas Angelinas
• Reporter: Nikitas Angelinas

Description

Some tools that maintain copies of filesystem metadata in an external database monitor changelogs for changes to the filesystem, in order to determine files that need to be rescanned. This can result in a large number of small updates to the external database that can reduce the tool's ingest performance. It might be beneficial to instead track and scan complete directories that contain modified files and update the external database using bulk operations. Adding the parent FID to MTIME changelogs allows to more efficiently determine the parent directories for some types of file data modifications, by issuing OBD_IOC_FID2PATH once for each parent FID, instead of once for each file FID.

Issue Links

• is related to: LU-16469 Add parent FID to CL_LAYOUT changelog records