Online Trends

As the largest and most successful open source project, Linux has attracted the contributions of programmers from all over the world. So far, more than 20,000 developers have submitted code to Linux Kernel.

This blog brings you the common problems and solutions of Spark, including controlling the reduce buffer size to avoid shuffle file pull failures caused by OOM and JVM GC

Hadoop is the support of big data, so we will have some questions, what is Hadoop, what can Hadoop do, what are its advantages, and how it performs massive data operations.

Ignore the price wars that have repeatedly exploded in the traditional CDN field. Recently, in the technical field of P2P+CDN, the market seems to have set off an invisible battle.

The widely distributed CDN nodes and the intelligent redundancy mechanism between nodes can effectively prevent hacker intrusion and reduce the impact of various DDOS attacks on the website.

Through the takeover of dns, the user's request is transparently directed to the nearest node, and the CDN server will be like the original website Like the server, it responds to user requests.

The CDN system can redirect the user's request to the node closest to the user in real time based on comprehensive information.

EOSIO uses a P (pipelines) BFT algorithm. The BOS network uses the P (Practical) BFT mechanism to replace the P (Pipelined) BFT. Under this mechanism, each BP can immediately confirm the block.

Even if you don't care about the user's specific geographic location, you should consider using CDN proxy cache to improve user experience.

In order to obtain the real IP of CDN, we must know the working principle of CDN. Here we will briefly introduce the working model of CDN.

CDN can provide a local data center so that users who are far away from the main server of your website can download files nearby and quickly.

The basic idea of ​​CDN is to avoid bottlenecks and links on the Internet that may affect the speed and stability of data transmission, so that content transmission can be faster and more stable.

If you want to learn about Bitcoin, sooner or later you need to deal with a series of thorny issues such as anonymity, privacy, pseudonym, etc.

As an investment outlet in the blockchain field in 2020, IPFS/Filecoin can be said to have maxed out our circle of friends recently.

I believe that DevOps is the driving force for breaking down barriers, breaking norms, providing quality, the symbiotic relationship between the company and its customers.

What is the intent of DevOps? That is, between the two teams, establish good communication and collaboration, and create high-quality software faster and more reliably!

It is said that if you ask 10 people about DevOps, you will get 12 answers. Experts say that DevOps is related to principles, practices and tools.

The DevOps standard mainly includes five major areas: R&D and operation integration, application design, security and active risk management, organizational structure, and system tools.

Data Structure and Algorithm Hash (Hash Table). Hash function: The function that realizes the conversion from a data item to a storage slot is called a hash function.

The function of dubbo is very complete. Many times we don't need to reinvent the wheel. Here are some functions that you may not know, but are very useful.