[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:

http://lists.lustre.org/pipermail/lustre-discuss-lustre.org/2018-February/015302.html

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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