====== iozone tests ======

iozone command: iozone -c -s 12g -r 4k -i6 -i7 -+n -w -f ./write_test.out

stg1 local ext4:
        KB  reclen   fwrite   fread
  12582912       4   189072 8765324

stg1 - 3 dir, 3 mrc, 3 osd: (~45% fuse, ~40% java)
        KB  reclen   fwrite   fread
  12582912       4   7051     56164

stg2 - 3 dir, 3 mrc, 3 osd: (~60% fuse, ~50% java)
        KB  reclen   fwrite   fread
  12582912       4    10905  115321


Extremely slow. Can't utilize enough resource. No more tests.