1. What is sub-database and sub-table? Table splitting: Split the data in one table into multiple tables according to certain rules, reduce lock granularity and index trees, and improve data query efficiency. Split database: Split the data in one database into multiple databases according to certain ... More >>

OverviewHashMap is a K/V key-value pair data structure with fast search and good insertion and deletion performance. It is implemented based on the Map interface of the hash table. It is one of the commonly used Java collections and is non-thread safe. Data StructureJDK1.7 The bottom layer uses ... More >>

In PHP and MySQL, there are different ways to manage database connections. These include short connections, long connections, and connection pooling. 1.Short connectionsShort connections refer to connecting to the database only when necessary and disconnecting immediately after the query is executed ... More >>

With increasing global trade and financial interactions, cross-border payment systems have become critical. Not only do these systems need to handle transactions between different countries and currencies, they must also address the various regulatory, currency conversion and security challenges inv ... More >>

General overviewAt the time of Android6.0 (Api23), the Android system added the api interface of fingerprint recognition, namely FingerprintManager, which defined the most basic fingerprint recognition interface. However, at the time of AndroidP (Api28), it was no longer officially recommended, and ... More >>

IntroductionApache Kafka is a distributed messaging system that has become an integral part of modern data processing pipelines. It is designed to handle real-time, high-throughput, and fault-tolerant data streaming. Kafka is widely used for ingesting, storing, and processing data in various applica ... More >>

What is a Task Scheduling FrameworkIn many applications, some tasks need to be performed periodically, such as generating reports, backing up data, updating caches, and so on. These tasks usually need to be executed automatically within a specified time interval, and need to run stably and reliably, ... More >>

1. Concept of Kotlin CoroutinesKotlin Coroutines is a well-designed thread framework that uses threads at the underlying level. Coroutines can be understood as tasks executed on threads, and these tasks can switch between different threads. A single thread can run multiple coroutines, and coroutines ... More >>

When it comes to API design and security, there are two main issues that must be addressed. If not handled properly, they can pose significant threats to the security and performance of the server.Based on my experience, API design primarily needs to consider the following two aspects: Preventing m ... More >>

1.NLP(Natural Language Processing)Natural language processing is an important direction in the field of computer science and artificial intelligence. It studies theories and methods that enable effective communication between humans and computers in natural language. Natural language processing is a ... More >>