https://www.submarinecablemap.com/
headers: {
‘Content-Type’: ‘application/json’
},
body: {
ip: (
req.headers[‘x-forwarded-for’].split(":")[0]
//req.headers[‘x-forwarded-for’] //||
//req.connection.remoteAddress ||
//req.socket.remoteAddress //||
//req.connection.socket.remoteAddress
)
}
https://www.youtube.com/watch?v=4ExDkvchC6Q 3:06開始
GDP2萬多，但實質購買力是5萬
有錢人存了很多錢
國外被掏空，經濟競爭力沒了，老闆不想產業升級
https://coder.tw/?p=7626
1. install gcloud
2. gcloud auth login `email` #login auth email, get rights for change 公開
2.1 gcloud auth revoke `email` #remove auth email
https://cloud.google.com/sdk/gcloud/reference/auth/login
設定 Bucket 新上傳的檔案預設公開，只能針對 Bucket 設定，不朔及既往 gsutil defacl set public-read gs://s.ntust.me
設定某資料夾（or Bucket）底下所有檔案、目錄為公開
gsutil acl set -r public-read gs://s.ntust.me/iatp
．https://blogs.dropbox.com/tech/2017/09/optimizing-web-servers-for-high-throughput-and-low-latency/
http://www.queryadmin.com/1654/tuning-linux-kernel-tcp-parameters-sysctl/
https://blogs.dropbox.com/tech/2017/09/optimizing-web-servers-for-high-throughput-and-low-latency/
Don’t USE
net.ipv4.tcp_tw_recycle=1
—don’t use it—it was already broken for users behind NAT, but if you upgrade your kernel, it will be broken for everyone.
net.ipv4.tcp_timestamps=0
—don’t disable them unless you know all side-effects and you are OK with them. For example, one of non-obvious side effects is that you will loose window scaling and SACK options on syncookies.
https://read01.com/zh-tw/KBgmj7.html
Don’t USE
net.ipv4.tcp_tw_recycle=1
net.ipv4.tcp_tw_reuse=1 /*Only you know, sometime can do*/
aws linux 官方
https://aws.amazon.com/tw/amazon-linux-ami/2017.09-release-notes/
ubuntu
https://segmentfault.com/a/1190000008395823
https://farer.org/2017/05/18/build-kernel-with-bbr-on-ec2-amazon-linux/
修改/etc/sysctl.conf文件，加入如下两行:
net.core.default_qdisc = fq
net.ipv4.tcp_congestion_control = bbr
檢查
cat /proc/sys/net/ipv4/tcp_congestion_control
