Improve Domestic Domain's Latency about chinadns HOT 10 CLOSED

本来就是这样。

from chinadns.

从我测试的结果，似乎chinadns 解析总是需要1秒以上的解析时间
chinadns -l /etc/chinadns/iplist.txt -p 2053 -v

time dig -p 2053 baidu.com @localhost
real 0m1.019s
time dig -p 2053 www.qq.com @localhost
real 0m1.019s
直接通过 114dns来解析
time dig qq.com @114.114.114.114
real 0m0.018s
time dig www.qq.com @114.114.114.114
real 0m0.018s
time dig baidu.com @114.114.114.114
real 0m0.017s

不清楚您那边的chinadns的测试结果如何呢？

from chinadns.

看一下 chinadns 的 log

from chinadns.

root@debian-router:/etc/dnsmasq.d# chinadns -l /etc/chinadns/iplist.txt -p 2053 -v
Mon Oct 27 11:13:16 2014 CHNROUTE_FILE not specified, CHNRoute is disabled
ChinaDNS-C 1.1.7
Mon Oct 27 11:14:56 2014 request baidu.com
Mon Oct 27 11:14:56 2014 response baidu.com from 114.114.114.114:53 - 220.181.111.85, 220.181.111.86, 123.125.114.144, pass
Mon Oct 27 11:14:57 2014 response baidu.com from 208.67.222.222:443 - 123.125.114.144, 220.181.111.85, 220.181.111.86, pass
Mon Oct 27 11:14:57 2014 response baidu.com from 8.8.8.8:53 - 123.125.114.144, 220.181.111.85, 220.181.111.86, pass
Mon Oct 27 11:31:27 2014 request baidu.com
Mon Oct 27 11:31:27 2014 response baidu.com from 114.114.114.114:53 - 220.181.111.86, 220.181.111.85, 123.125.114.144, pass
Mon Oct 27 11:31:28 2014 response baidu.com from 208.67.222.222:443 - 123.125.114.144, 220.181.111.85, 220.181.111.86, pass
Mon Oct 27 11:31:30 2014 request baidu.com
Mon Oct 27 11:31:30 2014 response baidu.com from 114.114.114.114:53 - 220.181.111.86, 220.181.111.85, 123.125.114.144, pass
Mon Oct 27 11:31:31 2014 response baidu.com from 208.67.222.222:443 - 123.125.114.144, 220.181.111.85, 220.181.111.86, pass
Mon Oct 27 11:32:06 2014 request www.qq.com
Mon Oct 27 11:32:06 2014 response www.qq.com from 114.114.114.114:53 - 180.96.86.192, pass
Mon Oct 27 11:32:07 2014 response www.qq.com from 208.67.222.222:443 - 101.226.129.158, 101.226.103.106, pass
Mon Oct 27 11:32:07 2014 response www.qq.com from 208.67.222.222:53 - 101.226.129.158, 101.226.103.106, pass

from chinadns.

增加chnroute 花费的时间也是一样的，需要1秒出头
root@debian-router:/etc/dnsmasq.d# chinadns -l /etc/chinadns/iplist.txt -c /etc/chinadns/chnroute.txt -p 2053 -v
ChinaDNS-C 1.1.7
Mon Oct 27 11:56:07 2014 request www.qq.com
Mon Oct 27 11:56:07 2014 response www.qq.com from 114.114.114.114:53 - 180.96.86.192, pass
Mon Oct 27 11:56:08 2014 response www.qq.com from 208.67.222.222:53 - 101.226.129.158, 101.226.103.106, pass
Mon Oct 27 11:56:15 2014 request www.baidu.com
Mon Oct 27 11:56:15 2014 response www.baidu.com from 114.114.114.114:53 - 180.97.33.107, 180.97.33.108, pass
Mon Oct 27 11:56:15 2014 response www.baidu.com from 8.8.8.8:53 - 115.239.210.27, 115.239.211.110, pass
Mon Oct 27 11:56:15 2014 response www.baidu.com from 208.67.222.222:443 - 115.239.210.27, 115.239.211.110, pass
Mon Oct 27 11:56:15 2014 response www.baidu.com from 208.67.222.222:53 - 115.239.210.27, 115.239.211.110, pass

from chinadns.

看不出问题，114 的结果瞬间就返回了
看下 dig 的结果

from chinadns.

跟 chnroute 没关系

from chinadns.

root@debian-router:~/src/chinadns-c-1.1.7/src# time dig -p 2053 www.baidu.com @localhost

; <<>> DiG 9.9.5-4.2-Debian <<>> -p 2053 www.baidu.com @localhost
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 8502
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;www.baidu.com. IN A

;; ANSWER SECTION:
www.baidu.com. 0 IN CNAME www.a.shifen.com.
www.a.shifen.com. 187 IN A 180.97.33.107
www.a.shifen.com. 187 IN A 180.97.33.108

;; Query time: 13 msec
;; SERVER: 127.0.0.1#2053(127.0.0.1)
;; WHEN: Mon Oct 27 12:01:51 CST 2014
;; MSG SIZE rcvd: 101

real 0m1.020s
user 0m0.000s
sys 0m0.004s

看着很正常

from chinadns.

把 localhost 改成 127.0.0.1

from chinadns.

正常了
因为最近老是碰到很奇怪的国内域名无法解析问题，也许是dnsmasq的bug

from chinadns.