nodetool自动监控bootstrapping\repairing\rebuilding进度

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不用其他监控套件，只是用nodetool工具借助netstats指令简单的监控收发数据流进度：

1
watch -n 10 'nodetool netstats | grep "Receiving\|Sending" | gawk {'"'"' print $1" - "$11/$4*100"% Complete, "($4-$11)/1024/1024/1024" GB remaining" '"'"'}'

References:
[1]On Cassandra Stream Monitoring