I want to take a set of Raspberry Pi cluster, used to do the front end of the site, the website is written in PHP, no database.
I want to know how many raspberry pies are needed to achieve the same performance as a E3 server (or other PC server), and has anyone done similar testing?
Reply content:First of all, we use a
images.
$ pip install numpy
Time consumed:
Raspberry Pi B +: less than 45 minutes
Raspberry Pi 2: less than 15 minutesStep 9:
Download and decompress OpenCV:
$ wget -O opencv-2.4.10.zip http://sourceforge.net/projects/opencvlibrary/files/opencv-unix/2.4.10/opencv-2.4.10
. It is also officially recommended by Raspberry Pi. Http://sourceforge.net/projects/win32diskimager/
After the image is complete, you can insert it to the pi to start.
Connect to the power supply, display start, crash, actually need a keyboard. Otherwise, initialization fails.
Fortunately, you can use SSH to connect t
Many people are interested in Raspberry Pi's hardware hack function, one thing I see is Raspberry Pi's low power consumption function. I can use it to replace the Linux Server currently in use. In my previous articles, I have introduced how to use Raspberry Pi to replace these servers to manage my beer fridge and a
In my previous article, I talked about how to build a high-availability system: Two Raspberry Pi deploy the GlusterFS cluster file system, and it becomes a fault-tolerant file server. In this article, we will build another Fault-Tolerant Service Based on this high-availability system: Build a simple Web server cluster.
an integrated plan that will make CRAFTBEERPI work well, and now it records these specific gravity data into Google's spreadsheets. Once the liquid gravity meter can be connected to the fermentation controller, the set of automatic fermentation settings will be based on the activity of the yeast directly and more easily, rather than complete the main fermentation within 4 days, you can set the temperature after 24 hours of stable gravity.For some projects
Vamei Source: Http://www.cnblogs.com/vamei prohibited any form of reprint.The Raspberry Pi is an ultra-small computer with a credit card size, developed by the Raspberry Pi Foundation of the Rotten Country (UK). Thanks to its ultra-small size, Raspberry
connected to the switch (or router) via a network cable respectively, if the Raspberry Pi external LCD screen can be operated directly on the Raspberry Pi, otherwise it can be operated remotely via Putty Software on the PC, however Putty needs to know the IP address of the Raspber
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1
$ pip Install NumPy
Take:
Raspberry Pi B +: less than 45 minutes
Raspberry Pi 2: Less than 15 minutesStep 9:
Download and decompression OpenCV:?
1 2 3
$ wget-o opencv-2.4. 10.zip http://sourceforge.net/projects/opencvlibrary/fil
First, install the Raspberry Pi and Arduino development environment
1, Arduino development environment in the previous article has been explained that the need for friends can see "Arduino Control two motor Movement" this blog post.
2. Building a Raspberry Pi serial communication development environment
(1) Install Py
:).-----------------------------to spit out the installation experience-----------------------------------------------------Today, there is a project to do a self-running measurement system, thinking about how to implement automatic measurement when not connected to the PC. The previous day has been the Python GUI, so think of the idle raspberry Pi, perhaps with an HDMI monitor can be used. Friday, while pl
prove that Snappy is a system for cloud computing, especially for Iot.
Snappy can also run on other clouds such as Amazon EC2, Microsoft Azure, and Google's Compute Engine. It can also be virtualized on KVM, Virtuabox, and vagrant. Canonical Ubuntu has embraced heavyweight players such as Microsoft, Google, Docker, and OpenStack, and has reached partnerships with small projects. In addition to some startups, such as Ninja Sphere and Erle Robotics, th
against businesses playing FM radio or vehicle radio systems and can Hel P influence a target ' s beliefs or actions by posing as a media outlet.Why a Raspberry Pi Works well for thisThe fact that you can get started broadcasting in the radio spectrum with only a wire are incredibly useful to anyone inter ested in radio projects or software defined radio and how
I want to build a Raspberry Pi cluster to serve as the front-end of the website. The website is written in php without a database. I want to know how many Raspberry Pi is required to achieve the same performance as an E3 server (or other pc servers). has anyone done a simila
Temperaturedefget_cpu_temp (): Cpu_temp_file= Open ("/sys/class/thermal/thermal_zone0/temp") Cpu_temp=Cpu_temp_file.read () cpu_temp_file.close ( )returnFloat (cpu_temp)/1000defMain (): whileTrue:strftime=time.strftime ("%y-%m-%dt%h:%m:%s") Print "Time :", StrftimePrint "cpu_temp:", Get_cpu_temp ()#Sleep 60 secondsTime.sleep (60)if __name__=='__main__': Main ()2nd step: Become the Yeelink platform developer and complete the configuration of the Raspb
-dev Libtiff-dev Libjasper-dev2. Get the source code to create the OpenCV folder in the Raspberry Pi user directory mkdir OpenCVTo get OpenCV source code from sourceforge website, this article chooses 2.4.9 version. The download process may be slow, please wait patiently. wget http://sourceforge.net/projects/opencvlibrary/files/opencv-unix/2.4.9/opencv-2.4.9.zip/
Pi. Http://sourceforge.net/projects/win32diskimager/
After the image is complete, you can insert it to the PI to start.
Connect to the power supply, display start, crash, actually need a keyboard. Otherwise, initialization fails.
Fortunately, you can use SSH to connect to the previous stage and quickly open the direct router to view the newly allocated DHCP user
Setting up Windows Ten for IoT on your Raspberry PiThis week on the BUILD conference in San Francisco Microsoft released the first preview of the Windows IoT (Internet of Thi NGS) for Raspberry Pi 2 (AS-well-lovely devices like the Intel Galileo and Minnowboard Max).First, as I mentioned in February the Raspberry
Geek DIY: Uses Raspberry Pi to create a four-axis drone
If you want to DIY a drone of your own, you can read this article and it may be helpful to you.
The main parts used in this project are mainly from Erle Robotics (an open-source four-axis aircraft project using Linux ). The author of this article does not work for this company. If you are interested in this scenario, you can also focus on basic
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