[lustre-discuss] confused about mdt space

Mohr Jr, Richard Frank rmohr at utk.edu
Wed Apr 1 07:07:02 PDT 2020

> On Apr 1, 2020, at 3:55 AM, 肖正刚 <guru.novice at gmail.com> wrote:
> For  " the recent lustre versions use a 1KB inode size by default and the default format options create 1 inodes for every 2.5 KB of MDT space" :
> I checked the inode size is 1KB and  in my online systems,  as you said , about 40~41% of mdt disk space consumed by inodes. 
> but from the manual I found the default "inode ratio" is 2K, so where the additional 0.5KB comes from ?

I was basing this on info I found in this email thread:


I think the 2K/inode ratio listed in the manual may be incorrect (or perhaps someone can point out my mistake).

Rick Mohr
Senior HPC System Administrator
Joint Institute for Computational Sciences
University of Tennessee

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