nginx 并发上线卡一道吧，之前就是搜索引并发直接搞挂了，后来在 nginx 卡了每秒的并发基本解决 90%问题

Docker 是未来趋势 ? 是趋势，但不是未来的趋势吧

[root@www data]# nslookup 123.151.42.61
Server: 100.100.2.138
Address: 100.100.2.138#53

** server can't find 61.42.151.123.in-addr.arpa.: NXDOMAIN

[root@www data]# nslookup 123.125.71.24
Server: 100.100.2.138
Address: 100.100.2.138#53

Non-authoritative answer:
24.71.125.123.in-addr.arpa name = baiduspider-123-125-71-24.crawl.baidu.com.

Authoritative answers can be found from:
125.123.in-addr.arpa nameserver = ns2.bta.net.cn.
125.123.in-addr.arpa nameserver = ns.bta.net.cn.
ns.bta.net.cn internet address = 202.96.0.133
ns2.bta.net.cn internet address = 202.106.196.28


你遇到的是假百度

@algas 这个算正常。

索引还需要占用空间哟

#!/bin/sh
cd to_your_dir
cat 1.txt 2.txt 3.txt > /root/sslimit/test.txt

spring 只能注入 spring 容器里面的对象。。。

@yxwzaxns 用 shell 来拼接 sql 来做吧

---现在我想查询出表里内容为 null 的
select * from user where id not in (select id from user where field1 is not null and field2 is not null .... and fieldn is not null)