uptime | 易学教程

PHP server statistics script? [closed]

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问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 3 years ago . I'm not really sure where to put this question (it's not really webapps or superuser) but I'm sure something similar already exists. I'm looking for a php script that gives me detailed info about things such as: CPU load Network load Temperatures I/O RAM etc Any suggestions? Thanks, Dennis 回答1: phpSysInfo is

ansible新手入门

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一 ansible简介 1 ansible概述 ansible是2013年推出的一款IT自动化和devops软件,redhat于2015年将其收购,基于python开发,融合了很多运维工具的优点. 可以实现: 自动化部署APP 自动化管理配置项自动化持续交付自动化(AWS)云服务管理 2 选择ansible的原因社区活跃度高,使用广泛学习成本低使用成本低编码语言是Python,做二次开发容易性能强大功能强大,模块丰富只需要ssh和python即可使用无客户端 3 ansible特性模块化设计,调用特定模块完成特定任务支持json等标准输出格式,可以采用任何编程语言重写部署简单,支持主从模式,支持自定义模块,支持playbook,支持多层部署,支持异构IT环境 4 工作流程二 ansible安装 1 软件依赖关系管理主机: 要求python2.6或2.7或以上版本需要安装模块: paramiko pyyaml jinja2 httplib2 six 被托管主机: ansible需要通过ssh协议管理机器需要安装python2.5 rsync 增量同步 rsync -a 基础命令合体 rsync -S 处理稀疏文件 2 安装ansible yum -y install ansible ansible --version 三 ad-hoc 1 主机管理

1.linux刷题

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2019年1月2日第1轮下列哪些命令可以测试网络通不通：ping 扩展： ping是一种电脑网络工具，用来测试数据包能否通过IP协议到达特定主机。ping的运作原理是向目标主机传出一个ICMP echo@要求数据包，并等待接收echo回应数据包。程序会按时间和成功响应的次数估算丢失数据包率（丢包率）和数据包往返时间（网络时延，Round-trip delay time）。 traceroute，现代Linux系统称为tracepath，Windows系统称为tracert，是一种电脑网络工具。它可显示数据包在IP网络经过的路由器的IP地址。 Netstat是在内核中访问网络及相关信息的程序，它能提供TCP连接，TCP和UDP监听，进程内存管理的相关报告。Netstat是控制台命令,是一个监控TCP/IP网络的非常有用的工具，它可以显示路由表、实际的网络连接以及每一个网络接口设备的状态信息。Netstat用于显示与IP、TCP、UDP和ICMP协议相关的统计数据，一般用于检验本机各端口的网络连接情况。在 linux 下，如何查看物理内存的大小？ cat /proc/meminfo 扩展：方式一： free 直观的展示linux系统内存使用及交换区的容量大小等方式二： top 动态实时查看系统中每一个进程的资源使用情况方式三： cat /proc/meminfo 方式四：

How to use GNU make --max-load on a multicore Linux machine?

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问题 From the documentation for GNU make: http://www.gnu.org/software/make/manual/make.html#Parallel When the system is heavily loaded, you will probably want to run fewer jobs than when it is lightly loaded. You can use the ‘-l’ option to tell make to limit the number of jobs to run at once, based on the load average. The ‘-l’ or ‘--max-load’ option is followed by a floating-point number. For example, -l 2.5 will not let make start more than one job if the load average is above 2.5. The ‘-l’

IOPS QPS TPS

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IOPS：(Input/Output operations Per Second,既每秒处理I/O的请求次数) IOPS是指存储每秒可接受多少次主机发出的访问，主机的一次IO需要多次访问存储才可以完成,这里提到磁盘读写能力,比如它每秒读100M,写50M.这个说明的是数据吞吐量，而IOPS指的则是每秒处理I/O的请求次数.详细展开来说请求次数就是读80M的文件是一次I/O请求,写1K的的数据也是一次I/O请求,那么IOPS的数值越高自然在一定时间内能接受的相应请求就越多,如果你在深入想一下也会发现这只是理论而已.因为同一个请求读80M与写1K所需要的时间自然不一样,除了寻道、数据传输等方面考虑的因素其实很多很多,那么如果IOPS够高的话,那么用在OLTP系统上会更加合适.对于如何获得IOPS的值,在Linux、Windows上都有很多工具可供测试,不过可参考的价值未必多.如果要提高IOPS,传统方案还是使用RAID条带后使I/O能力获得提升,近几年固态硬盘SSD很火热,不同厂商之间的技术指标也不尽相同,至于像Fusion-IO这种变态级的IOPS都可以干到百万级别.一般情况下用SSD基本上可以满足需求了.多块SSD条带性能还是很猛的.不过烧钱烧的多还有就是寿命问题. IOPS的计算公式IOPS=1000ms/(寻道时间+旋转延迟时间) QPS(Query Per Second

!UpTime Twitch command (TwitchBot C#)

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问题 I was wondering how I would add a command for 'UpTime' in my commands that will show how long the twitch channel has been live for. This is my whole code: https://pastebin.com/ty8J3vYS Im not sure if i add it into my commands with things added to it with another case such as case "uptime": irc.sendChatMessage(""); break; Any help/guidance would be great. Thanks in advanced. 回答1: You can use Twitch's own API for this. Using this URL: https://api.twitch.tv/kraken/streams/CHANNEL_ID CHANNEL_ID

Total uptime on Android and iPhone

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问题 As far as I know both OSes allow me to obtain the current uptime since the last boot, but is there a way to obtain the total uptime since the OS was first started, or since my application was installed or something like that? I was thinking of running a background service on boot to accumulate that for me, but turns out I can't really do that on iOS or something. Any ideas how this can be achieved? 回答1: Speaking for Android: is there a way to obtain the total uptime since the OS was first

ktime_get() equivalent in user space

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问题 I want to map the time taken through ktime_get() at kernel space to something of the same unit from user space. Is there any proc entry or any other source(at user level) which can be compared with ktime_get()? 回答1: Use clock_gettime (CLOCK_MONOTONIC) . 来源： https://stackoverflow.com/questions/27224325/ktime-get-equivalent-in-user-space

How to retrieve the process start time (or uptime) in python

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问题 How to retrieve the process start time (or uptime) in python in Linux? I only know, I can call "ps -p my_process_id -f" and then parse the output. But it is not cool. 回答1: If you are doing it from within the python program you're trying to measure, you could do something like this: import time # at the beginning of the script startTime = time.time() # ... def getUptime(): """ Returns the number of seconds since the program started. """ # do return startTime if you just want the process start

Dubbo负载均衡

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AbstractLoadBalance 在 Dubbo 中，所有负载均衡实现类均继承自 AbstractLoadBalance，该类实现了 LoadBalance 接口，并封装了一些公共的逻辑。负载均衡的入口在AbstractLoadBalance的select方法。 public abstract class AbstractLoadBalance implements LoadBalance { ...... @Override public <T> Invoker<T> select(List<Invoker<T>> invokers, URL url, Invocation invocation) { if (CollectionUtils.isEmpty(invokers)) { return null; } // 如果 invokers 列表中仅有一个 Invoker，直接返回即可，无需进行负载均衡 if (invokers.size() == 1) { return invokers.get(0); } // 进行负载均衡，该方法为抽象方法，由子类实现 return doSelect(invokers, url, invocation); } protected abstract <T> Invoker<T> doSelect(List<Invoker<T>>

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