MongoDB迁移

参考文档

• https://xiangsugar.github.io/2018/06/24/MongoDB%E4%B8%8D%E5%90%8C%E6%9C%8D%E5%8A%A1%E5%99%A8%E4%B9%8B%E9%97%B4%E7%9A%84%E6%95%B0%E6%8D%AE%E8%BF%81%E7%A7%BB/
• https://www.jianshu.com/p/d65190e16afe

命令

mongodump -d hydrabot -c policy_content
mongorestore -d hydrabot -c policy_content --drop  ./policy_content.bson