[LU-6544] Improve mkfs.lustre --stripe-count-hint inode size calculation for ldiskfs

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.8.0
• Affects Version/s: Lustre 2.5.3, Lustre 2.8.0
• Labels: easy
• Severity: 3
• Assignee: Emoly Liu
• Reporter: Andreas Dilger

Description

Running mkfs.lustre --stripe-count-hint=N should tune the ldiskfs inode size to allow files with N stripes to fit the lov layout xattr into the inode rather than storing it in an external xattr block (which reduces performance and significantly increases the space used per file on the MDT). However, I think that with newer xattrs such as lma may not be taken into account in the default stripe calculations.