hadoop:https://hadoop.apache.org/docs/stable/
hive:https://cwiki.apache.org/confluence/display/Hive/GettingStarted
hbase:https://hbase.apache.org/book.html
yarn:https://hadoop.apache.org/docs/current/hadoop-yarn/hadoop-yarn-site/YARN.html
mesos:http://mesos.apache.org/
storm:http://storm.apache.org/
spark:http://spark.apache.org/docs/latest/
flink:https://flink.apache.org/
phoenix:http://phoenix.apache.org/who_is_using.html
redis:https://redis.io/documentation
sqoop:http://sqoop.apache.org/
flume:http://flume.apache.org/documentation.html
kafka:http://kafka.apachecn.org/
nginx:http://nginx.org/
zookeeper:https://zookeeper.apache.org/