capacity     operations    bandwidth
pool        alloc   free   read  write   read  write
----------  -----  -----  -----  -----  -----  -----
ost0         708K  29.0T      0      4  26.2K   107K
ost0        36.7G  29.0T      0    833      0   642M
ost0        68.5G  28.9T    205    808   822K   572M
ost0        98.5G  28.9T    275    724  1.08M   512M