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搭建高可用mongodb集群（四）—— 分片 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...里测试资源有限，只准备了 3台机器，在同一台机器只要端口不同就可以，看一下物理部署图：
架构搭好了，安装软件！
1、准备机器，IP分别设置为： 192.168.0.136、192.168.0.137、192.168.0.138。
2、分别在每台机器上建立mongodb分...
What's causing my java.net.SocketException: Connection reset? [duplicate]
...is no longer responding to ACK flags, or that it is not responding per TCP/IP). If the FYN flag was sent, or rather the server closed the connection, you would just get -1 from read(), and an EOFException. When I get home I plan on confirming this either way.
– Zombies
...
windows版 svn 服务器搭建及总结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...问题了，去/etc/sysconfig/iptables 设置一下，打开默认的3690端口就可以了
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在myeclipse 8.5中使用subeclipse插件的若干问题：
貌似 插件的同...
App Inventor 2 UrsPahoMqttClient 拓展 - 物联网轻量级MQTT协议 · App Inventor 2 中文网
...ker - MQTT消息服务器
服务器的主机名或 IP 地址。
Port - 端口
连接的端口号。默认值为 1883。
Protocol - 协议
协议类型：允许的值为TCP、SSL和TLS，其他值将被忽略。
身份标识
ClientID - 客户端ID
可选：唯一客户端标识。...
iPhone: How to get current milliseconds?
...if portability is a priority for you.
iPhone 4S
CACurrentMediaTime: 1.33 µs/call
gettimeofday: 1.38 µs/call
[NSDate timeIntervalSinceReferenceDate]: 1.45 µs/call
CFAbsoluteTimeGetCurrent: 1.48 µs/call
[[NSDate date] timeIntervalSince1970]: 4.93 µs/call
iPad 3
CACurrentMediaTime: 1.25 µs/c...
How to compare Unicode characters that “look alike”?
...ain(string[] args)
{
char first = 'μ';
char second = 'µ';
// Technically you only need to normalize U+00B5 to obtain U+03BC, but
// if you're unsure which character is which, you can safely normalize both
string firstNormalized = first.ToString().Normal...
Characters allowed in a URL
...d and pasted, but I'll do my best.
In first matched order:
host = IP-literal / IPv4address / reg-name
IP-literal = "[" ( IPv6address / IPvFuture ) "]"
IPvFuture = "v" 1*HEXDIG "." 1*( unreserved / sub-delims / ":" )
IPv6address = 6( h16 ":" ) ls32
/ ...
淘宝网采用什么技术架构来实现网站高负载的 - 更多技术 - 清泛网 - 专注C/C...
...。目前淘宝也在研究和使用一些成熟的NOSQL产品。
七、监控、预警系统
对于大型的系统 来说，唯一可靠的就是系统的各个部分是不可靠。
因 为一个大型的分布式系统中势必会涉及到各种各样的设备，比如网络交换机，普通PC...
Insert an element at a specific index in a list and return the updated list
...ents for Python 3.4.5:
Mine answer using sliced insertion - Fastest (3.08 µsec per loop)
mquadri$ python3 -m timeit -s "a = list(range(1000))" "b = a[:]; b[500:500] = [3]"
100000 loops, best of 3: 3.08 µsec per loop
ATOzTOA's accepted answer based on merge of sliced lists - Second (6.71 µsec...
“Cloning” row or column vectors
...t;>> %timeit np.array(np.broadcast_to(x, (reps, n)))
10.2 ms ± 62.3 µs per loop (mean ± std. dev. of 7 runs, 100 loops each)
>>> %timeit np.repeat(x[np.newaxis, :], reps, axis=0)
9.88 ms ± 52.4 µs per loop (mean ± std. dev. of 7 runs, 100 loops each)
>>> %timeit np.ti...