What are Forward and Reverse Proxies?
As David Wheeler said:
All problems in computer science can be solved by another level of indirection.
The idea of proxy is reflected in many fields of computers. In essence, A and B can communicate directly, but we add C as an intermediary, and A and B communicate through C.
In-depth understanding of 3-Way Handshake Connection and 4-Way Handshake Termination in TCP
We all know that the establishment of TCP connection has "3-Way Handshake Connection and 4-Way Handshake Termination", but what exactly happened in the middle? Why is the number of handshake more in termination? What if only 2-Way Handshake are used? What will happen if there is network delay or packet loss during the handshake? This article will give you the answer.
Basic concepts and common problems related to Kafka
Kafka is currently the most mainstream distributed stream processing platform. It is widely used for its high throughput, persistence, horizontal scalability, support for stream data processing and other features.
Gene method: Solve the query of non-sharding key in the case of sharding
In the scenario of big data, we all know that when the number of single tables reaches 20 million or 2 GB, it is necessary to shard the database and table. However, after all data is sharded according to the specified sharding key, a new problem will arise: How to query non-sharding key? Of course, we can quickly think of a violent method, which is to use multiple threads to search all partitions at the same time, and then merge and summarize the results of each thread. But obviously this solution is very inefficient.
Can we directly determine which partition this data is in from the non-sharding key? The answer is: Yes. This article will introduce one of the methods: Gene method.
What is a Consistent Hash Algorithm?
"Consistent Hash" seems to be a confusing name, because the result of the hash function should be the same no matter where it is calculated, so why is there a consistency problem?
Understanding the Raft Algorithm: Detailed Explanation of Consistency and Leader Election Mechanism
In a distributed system, there are usually many nodes. If the nodes need to reach a consensus, ensuring the consistency between the nodes has become a concern for all distributed systems.
Git Tips on CRLF--Warning: in the working copy of CRLF will be replaced by LF the next time Git touches it.
I have been updating my blog recently and encountered three very troubling problems:
- After executing the
git addcommand, there is always a Warning prompt:Warning: in the working copy of CRLF will be replaced by LF the next time Git touches it. git clonea newrepowill directly display the filemodified, even though nothing has been changed.- After submitting the local pdf file to the warehouse, it was inexplicably damaged, and large black spots appeared on the pdf file.
Later, I found that these 3 problems were actually caused by one problem: the CRLF symbol. Many people who searched online also encountered the same problem, Everyone said that we need to change the configuration of Git, but no one has explained the principle clearly. I will write a document to record it today.
Keep It Simple
A website for study notes.
ShenZhen, China
Announcement: Limited English Blog Content
Dear readers,
Thank you for visiting my blog! I want to acknowledge that there aren't many posts in English here at the moment. As a native Chinese speaker, I've always written primarily in Chinese. However, I'm now working to translate my existing content into English to reach more readers.
This process involves using tools like Google Translate, so you may encounter occasional less-than-perfect expressions. I truly appreciate your understanding and patience as I navigate this transition.
The translation effort will take time, but I'm committed to bringing more content to you in English. Thank you for your support and for sticking around! 😄