June 3, 2018 system design coaching - 8:00 AM - 10:10 AM

System design coaching and discussion

https://www.educative.io/collection/5668639101419520/5649050225344512

http://juliachencoding.blogspot.com/2018/06/what-is-microservice-architecture.html

Map:
k1, v1 -> a list of (k2, v2)

Reduce:
k2, list of v -> k3, v3

GFS -> Google File System

Hadoop, HDFS

Spark: 1, lazy mode

HDFS: replica, partition

https://gist.github.com/jianminchen/8f127514054f6bea677f705e47349bc3

<em>反向代理</em>为何叫<em>反向代理</em>？ - 阿笠硕士的回答 - 知乎
https://www.zhihu.com/question/24723688/answer/48369770


thread-safe

mutex

incr: fetch, add, write-back

     thread1   thread
1    fetch 1
2    add 1     fetch 1
3    w
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