February 13, 2020 . computer
You login a shell and launch a long running script, then quit the shell/terminal but not sure if the script (and its child processes) will continue running or not? You try to catch and handle signals in the script but it does work as you expected? Below are some tests to help you understand these things.
February 12, 2020 . computer
据中国驻澳洲大使馆官网，护照有效期不足一年就可以申请换护照 。 所有相关信息、链接 都可以在这个网页找到。回国度长假前切记检查护照有效期。必要的话提前换好护照，免得 过完长假要回来时护照有效期不足6个月。
February 5, 2020 . computer
Have you encountered the situation that, when reviewing a mongod log file, you'd
like to focus on what operations a particular client (identified by its IP
address) has done but the
mongod was so busy that the log file was inundated
with lots of messages/operations from other clients?
October 20, 2016 . computer
Let's assume our database manages a collection of users. Each belongs to certain region and we have two data centers, located in one of the regions respectively. To avoid high network latency between regions, we shall store user information in the nearest data center. Following demo showcases how tag aware sharding can help in such kind of cases.
October 14, 2016 . computer
> 0.1 + 0.2 0.30000000000000004 > 0.1 + 1 - 1 0.10000000000000009