> On Mar 30, 2020, at 10:56 PM, 肖正刚 <guru.nov...@gmail.com> wrote: > > Hello, I have some question about metadata space. > 1) I have ten 960GB SAS SSDs for mdt,after done raid10,we have 4.7TB space > free. > after formated as mdt,we only have 2.6TB space free; so where the 2.1TB space > go ? > 2) for the 2.6TB space, what's it used for?
That space is used by inodes. I believe 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. So about 40% of your disk space will be consumed by inodes. — Rick Mohr Senior HPC System Administrator Joint Institute for Computational Sciences University of Tennessee _______________________________________________ lustre-discuss mailing list lustre-discuss@lists.lustre.org http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
