同集群不同索引全量对比:
	./tool compare \
	-a http://127.0.0.1:9200 -u username -p password -i index \
	-I index1 \
	-s 4000 \
	-S 8
不同集群索引全量对比，对比过程中自动reindex不一致数据:
	./tool compare \
	-a http://127.0.0.1:9200 -u username -p password -i index \
	-H http://0.0.0.0:9200 -U username1 -P password1 -I index1 \
	-s 4000 \
	-S 8 \
	-r true
对比指定条件数据:
	./tool compare \
	-a http://127.0.0.1:9200 -u username -p password -i index \
	-H http://0.0.0.0:9200 -U username1 -P password1 -I index1 \
	-s 4000 \
	-q '{"query":{"terms":{"id":["1715478400352693852"]}}}'
根据order_time分10段并发对比:
	./tool compare \
	-a http://127.0.0.1:9200 -u username -p password -i index \
	-H http://0.0.0.0:9200 -U username1 -P password1 -I index1 \
	-s 4000 \
	-f order_time \
	-c 10

tool compare -h 查看帮助

Flags:
  -a, --srcHost string       Source ES host: http//ip:port
  -i, --srcIndex string      Source ES index
  -p, --srcPassword string   Source ES password
  -u, --srcUserName string   Source ES userName
  -A, --dstHost string       Destination ES host: http//ip:port, default same as srcHost.
  -I, --dstIndex string      Destination ES index, It should be different from srcIndex when dstHost is same as srcHost.
  -P, --dstPassword string   Destination ES password, default same as srcPassword.
  -U, --dstUserName string   Destination ES userName, default same as srcUserName.
  -s, --size int             Batch size (default 1000)
  -S, --slices int           Scroll slices, suggest to use the same number of shards (default 1)
  -f, --field string         Custom concurrency field (default "order_time")
  -c, --concurNum int        Number of custom concurrency queries (default 1)
  -q, --query string         Query body
  -r, --repair               Auto repair
  -h, --help                 help for compare