ARTS week 2

Algorithm

[对称二叉树](https://leetcode-cn.com/problems/symmetric-tree/)

递归下降检查即可

Review

[Columbia](https://15721.courses.cs.cmu.edu/spring2018/papers/15-optimizer1/xu-columbia-thesis1998.pdf)



一个 volcano / cascade型的优化器实现.

Tips

hub cherrypick 可以down一个pr的内容



Linux 打开服务端口

firewall-cmd --zone=public --list-ports

firewall-cmd --zone=public --add-port=6500-6530/tcp

Share

[folly::future](https://www.infoq.cn/article/2015/07/facebook-folly-futures)