大约有 1,500 项符合查询结果（耗时：0.0083秒） [XML]
java.net.ConnectException: localhost/127.0.0.1:8080 - Connection refused
...ly i am doing the same thing. Can u explain in detail. Where to change the ip address to 10.0.2.2. This is the folder i am trying to access from xampp server localhost:8080/aero
– pradeep
Mar 31 '11 at 5:56
...
How can I do DNS lookups in Python, including referring to /etc/hosts?
...y sure if you want to do DNS lookups yourself or if you just want a host's ip. In case you want the latter,
import socket
print(socket.gethostbyname('localhost')) # result from hosts file
print(socket.gethostbyname('google.com')) # your os sends out a dns query
...
Max length for client ip address [duplicate]
...uld you recommend as the maximum size for a database column storing client ip addresses? I have it set to 16 right now, but could I get an ip address that is longer than that with IPv6, etc?
...
Validating IPv4 addresses with regexp
I've been trying to get an efficient regex for IPv4 validation, but without much luck. It seemed at one point I had had it with (25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?(\.|$)){4} , but it produces some strange results:
...
Add Keypair to existing EC2 instance
...eating these steps until you have it working.
Note: If you had an Elastic IP address assigned to instance A when you stopped it, you’ll need to reassociate it after starting it up again.
Remember! If your instance B was temporarily started just for this process, don’t forget to terminate it no...
进程间通信（IPC）的几种方式 - C/C++ - 清泛网 - 专注C/C++及内核技术
...的效率太低了，而人们对进程间通信的要求是要有一定的实时性。
进程间通信主要包括管道, 系统IPC(包括消息队列,信号量,共享存储), SOCKET.
管道包括三种:1)普通管道PIPE, 通常有种限制,一是半双工,只能单向传输;二是只能在父...
工程师每周体验2G网 Facebook何用意？ - 资讯 - 清泛网 - 专注C/C++及内核技术
...发了开源的网络接入服务系统，让Facebook的app能识别用户实时的联网速度。今后，Facebook还会有针对性地展示不同的News Feed报道，例如在网速超慢的时候优先更新状态和相关链接，其次才是显示视频和图片，而且不再同时下载多...
灾难恢复RTO 与 RPO - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...新程度可以是上一周的备份数据，也可以是上一次交易的实时数据。
选择标准
对灾难恢复而言， RTO 与 RPO 哪个衡量指标更合适呢？
在考虑采用哪个指标之前，IT 人首先要弄清楚一个基本概念，企业的容灾系统预防的是...
PHP操作MongoDB时的整数问题及对策 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...我们可以定期预生成它，相当于维护一个缓存表，只要对实时性要求不太高就没问题。
把大象放冰箱里需要三步，而使用MapReduce仅仅需要Map和Reduce两步即可，这里有一个PDF文档生动的说明了MySQL中GROUP BY和MongoDB中MapReduce的对应...
PHP优化杂烩 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...分。动态模式一般先启动少量进程，再按照请求数的多少实时调整进程数。如此的优点很明显：节省资源；当然它的缺点也很明显：一旦出现高并发请求，系统将不得不忙着 FORK 新进程，必然会影响性能。相对应的，静态模式一...