In my test, my test config with these:
hd=default,vdbench=/root/wzl/vdbench50407,user=root,shell=ssh
hd=hd1,system=10.28.1.146
fsd=fsd1,anchor=/cnas/mnt/xvui6e07/111,depth=5,width=10,files=100,size=1k,openflags=o_direct
fwd=default,operation=create,xfersize=4k,fileio=random,fileselect=sequential,rdpct=50,threads=64
fwd=fwd1,fsd=fsd1,host=hd1
rd=rd1,fwd=fwd*,fwdrate=max,format=yes,elapsed=600,interval=1
to create 1000w files with 1k.
but i check my machine for space left, i think it's enough for space and inode in the test.
thanks!