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高并发服务端分布式系统设计概要 - C/C++ - 清泛网 - 专注C/C++及内核技术
...何做到的呢？这里涉及到“分布式选举”的概念，如Paxos协议，通过分布式选举，总能找到一个最接近Group Master的Group Slave，来顶替它，从而保证系统的可持续工作。当然，在此过程中，对于最终一致性系统，仍然会有一小段时...
How do I get a list of all subdomains of a domain? [closed]
...ns1.foo.bar in your example) is configured to allow AXFR requests from the IP you're using; this is unlikely, unless your IP is configured as a secondary for the domain in question.
Basically, there's no easy way to do it if you're not allowed to use axfr. This is intentional, so the only way arou...
Max parallel http connections in a browser?
...zing-front-end-back-end-705/
HTTP/2(SPDY)
Multiplexed support(one single TCP connection for all requests)
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How to split a string and assign it to variables
...trings"
)
func main() {
s := strings.Split("127.0.0.1:5432", ":")
ip, port := s[0], s[1]
fmt.Println(ip, port)
}
Output:
127.0.0.1 5432
One step, for example,
package main
import (
"fmt"
"net"
)
func main() {
host, port, err := net.SplitHostPort("127.0.0.1:5432")
...
How to configure logging to syslog in Python?
... the local host for logging, whether to /dev/log or localhost through the TCP stack. This allows the fully RFC compliant and featureful system logging daemon to handle syslog. This eliminates the need for the remote daemon to be functional and provides the enhanced capabilities of syslog daemon's s...
How to overcome root domain CNAME restrictions?
...N. Most CDNs are by necessity an FQDN, since it could resolve to different IPs at different locations or times. I use DNS Made Easy and was able to use the ANAME record type.
– Rubix
Oct 1 '15 at 6:26
...
Assign output to variable in Bash
... you don't put a $ in front of a variable you're assigning. You only use $IP when you're referring to the variable.
#!/bin/bash
IP=$(curl automation.whatismyip.com/n09230945.asp)
echo "$IP"
sed "s/IP/$IP/" nsupdate.txt | nsupdate
...
How do I determine if a port is open on a Windows server? [closed]
...
Assuming that it's a TCP (rather than UDP) port that you're trying to use:
On the server itself, use netstat -an to check to see which ports are listening.
From outside, just use telnet host port (or telnet host:port on Unix systems) to see if ...
360安全检测到18%后提示失败，关闭云盾、设置白名单解决 - 更多技术 - 清泛...
...防火墙进行拦截。且这些请求都是从360网站安全卫士集群ip地址发出，且攻击流量较大，速度也较快，导致触发了应用防火墙的防护机制，将360网站安全卫士的集群ip加入了黑名单，在一定时间内封禁其所有的访问，所以会导致...
01_Real Application Clusters Overview - 文档下载 - 清泛网 - 专注IT技能提升
...真正应用集群
ASM管理存储，Oracle自己的文件系统
心跳ip有问题，关闭次节点只留主节点，防止数据混乱
virtual ip 可漂移，private ip 心跳ip，scan ip DNS解析
ntp服务禁用（时间同步服务，Oracle自己有同步）
grid 用户：存储、集群...