capacity     operations    bandwidth
pool        alloc   free   read  write   read  write
----------  -----  -----  -----  -----  -----  -----
ost0         984K  32.5T      0      3      0  12.7K
ost0        38.7G  32.5T      0  1.71K      0   607M
ost0        75.8G  32.4T    166  2.31K   665K   576M
ost0         107G  32.4T    434  1.93K  1.70M   478M
ost0         139G  32.4T    245  1.95K   983K   472M