Hi everyone, I did a test to see the usage rate of inode on mds: test1 Beginning my test, the fs stats of MDS are: Fs size: 4279928 (1K-blocks) Inode count: 1222992 Block count: 1222948 Reserved block count: 61147 Free blocks: 1012426 Free Inode： 1222965 I touched files ceaselessly. When touch 1190792 files, I got the error“No space left on device.” And there were still left 32173 inodes free. I guess any pre-allocate policy in lustre, and then I did a test again. test2 Beginning my test, the fs stats of MDS are: Inode count: 490080 Block count: 489982 Reserved block count: 24499 Free blocks: 408479 Free inodes: 490067 At the end the maximum files number is 490060, and 7 free inodes left. It seems ruleless. Why the usage rate of free inode cannot be 100%? Any rule under? Thanks and best wishes, Xiang
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