cc -Wall -O2 scan.c -s -o scan
dd of=./file if=/dev/random seek=1024 count=1
./scan < file
80000 80073
scan.sh uses the du
command
Running it across a cluster
while true; do for i in {71..78}; do echo $i; ssh -f 10.12.1.${i} 'find /data/disk*/hadoop-ozone/datanode/ -type f -name "*.block"| parallel ~/scan2.sh {} '; done; sleep 60; done