https://www.facebook.com/dominic16y/posts/1378435818935569
今天跑去台中聽了OVS (Open vSwitch)講座，收獲頗豐(真的值回車票價了!)，這個東西我自己的研究可能要花好幾個月的時間，還不一定能抓對方向或抓到重點，講師今天一個下午就把所有關鍵的問題都提到了，比如說你linux bridge 用的好好的幹嘛要轉到ovs來，這是大家都會關心的問題。
底下一些重點整理:
1.linux bridge效能很好，沒有什麼特殊的需求的話，不用轉到OVS去。
2.linux bridge效能的極限，kernel 跑不滿10G的頻寬(大約7G/s左右)，若你不用10G的網路的話，linux bridge很好用。
3.OVS原生的效能比linux bridge效能差
4.OVS必須要另外加DPDK才能夠跑滿10G頻寬。(大約可跑到15~20G/s)
5.OVS單台機器沒有什麼用，它的功能跟linux bridge一樣
6.OVS必須要多台，並加上controller才能發揮它真正的功能
7.controller 推薦ONOS、OVN
8.OVS支援所有L2的功能(和靜態路由L3功能)，它要使用controller之後，就可以不用STP，可充份利用所有頻寬，也不怕looping所造成的廣播風暴。
master 192.168.105.20 srs.conf
isten 1935;
max_connections 1000;
srs_log_tank console; #file; #console;
srs_log_file ./objs/srs.log;
daemon off; #on or delete this line
http_api {
enabled on;
listen 1985;
}
http_server {
enabled on;
listen 8080;
dir ./objs/nginx/html;
}
stats {
network 0;
disk sda sdb xvda xvdb;
}
vhost __defaultVhost__ {
ingest livestream {
enabled on;
input {
type stream;
url rtmp://xxx.
https://www.pendrivelinux.com/yumi-multiboot-usb-creator/
https://www.pendrivelinux.com/universal-usb-installer-easy-as-1-2-3/
https://blog.technologyofkevin.com/?p=591
see http://sueboy.blogspot.tw/2017/11/nginx-proxy-pass-best-practices.html
http://sueboy.blogspot.tw/2017/11/nginx-proxy-pass-best-practices-2-for.html
http://dockone.io/article/128
http://container42.com/2014/11/18/data-only-container-madness/
http://dockone.io/article/129
在volume产生时，是docker run的准备阶段（create），而执行entrypoint.sh则是在启动阶段（start）
ssh-copy-id better use root
ssh-copy-id finish
Reboot clustercontrol server
======sysbench======
[sysbench]
select
sysbench –num-threads=128 –report-interval=3 –max-requests=0 –max-time=300 –test=/usr/share/sysbench/tests/include/oltp_legacy/select.lua –mysql-table-engine=innodb –oltp-table-size=5000000 –mysql-user=root –mysql-password=“E<8r)^t-E<8r)^t-” –oltp-tables-count=1 –db-driver=mysql –mysql-host=192.168.xxx.xxx –mysql-port=3306 prepare
sysbench –num-threads=128 –report-interval=3 –max-requests=0 –max-time=300 –test=/usr/share/sysbench/tests/include/oltp_legacy/select.lua –mysql-table-engine=innodb –oltp-table-size=5000000 –mysql-user=root –mysql-password=“E<8r)^t-E<8r)^t-” –oltp-tables-count=1 –db-driver=mysql –mysql-host=192.168.xxx.xxx –mysql-port=3306 run
Oltp read/write
* 产生数据
sysbench –num-threads=128 –report-interval=3 –max-requests=0 –max-time=300 –test=/usr/share/sysbench/tests/include/oltp_legacy/oltp.lua –mysql-table-engine=innodb –oltp-table-size=5000000 –mysql-user=root –mysql-password=“E<8r)^t-E<8r)^t-” –oltp-tables-count=1 –db-driver=mysql –mysql-host=192.168.xxx.xxx –mysql-port=3306 prepare
* 执行
sysbench –num-threads=128 –report-interval=3 –max-requests=0 –max-time=300 –test=/usr/share/sysbench/tests/include/oltp_legacy/oltp.lua –mysql-table-engine=innodb –oltp-table-size=5000000 –mysql-user=root –mysql-password=“E<8r)^t-E<8r)^t-” –oltp-tables-count=1 –db-driver=mysql –mysql-host=192.
https://severalnines.com/docs/requirements.html#operating-system-user
