Eight practical ways to solve Spark data skew
What is data skew?
For distributed big data systems such as Spark/Hadoop, the large amount of data is not scary; what is scary is data skew.
For dis...
I saw on the Internet that "after the battery is disconnected, the power of the mobile phone is provided by the charger. At this time, the battery is in a dormant state, neither charging nor dischargi...
[i=s]This post was last edited by yangjiaxu on 2019-1-16 23:49[/i] I have been so depressed these past two days. I have not been able to log in to the Rapid IOT Studio online development environment. ...
[i=s]This post was last edited by Xiaotaiyangyy on 2021-8-11 14:49[/i]The silk screen on it says 96 TI. Is this from Texas Instruments? Why can't I find it?Because it is not clear, I re-uploaded...
Author: Huang Gang, member of YiBo Technology ExpresswayFrom the simulation results of the previous article, a pair of differential lines can indeed control impedance well by returning to each other. ...
Hello everyone, I would like to ask a question. When I was programming, I wanted to add the ADC example of the esp32 low-level driver code to my project, but as soon as I added this example to my proj...
Some instruction descriptions -The difference between "read pin" and "read latch" instructions About the difference between the "read pin" and "read latch" instructions of the parallel I/O port F...[Details]
After successfully crowdfunding on the Indiegogo platform in March last year, Astro Slide 5G is finally ready to ship in June this year, and it will be available for purchase in September this ...[Details]
When using the PWM function of STM8, the duty cycle is usually changed to change the output voltage. However, sometimes it is not necessary to change the duty cycle of PWM, but it is necessary to cha...[Details]
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The battery management system is an important system for electric vehicles, which is related to the safety of the battery. The electric vehicle battery management system (BMS) is an important link be...[Details]
#include "regs.h" void enable_mmu(unsigned long ttb); void init_ttb(unsigned long *ttb_base); void mmap(unsigned long *ttb_base, unsigned long va, unsigned long pa); void memset(char *buf, char ch, i...[Details]
1. Interrupt handling process First we need to initialize the interrupt, which is mainly divided into the following three parts: Set up the interrupt so that it can send an interrupt signal, Set up...[Details]
According to foreign media reports, Marvell has launched a series of high-port count, ultra-low latency automotive switch chips with gigabit routing throughput capabilities. The new product portfolio...[Details]
With the development of science and technology, the detection of weak signals is becoming more and more important, and has gradually formed a special marginal discipline. The lock-in amplifier (LIA) ...[Details]
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Storage test technology is an effective method to record the parameters of moving objects under special conditions. The test data is first stored in the memory, and after the device is r...[Details]
When the Tesla Roadster went into production in 2008, owners were promised more than 210 miles of range per charge. Now, more than a decade later, the upcoming version nearly triples that promise. B...[Details]
Recently, Bosch Sensortec, a wholly-owned subsidiary of Bosch Group, officially announced that its consumer sensor shipments in China have exceeded 2 billion. This figure not only reflects the huge d...[Details]
Mitsubishi PLC (Programmable Logic Controller) is a control device widely used in the field of industrial automation. It controls mechanical equipment through programming and has the characteristic...[Details]