1. Background Traditional processing: If redis is not involved, the process of the initial user request is probably to go to the database to determine whether the current user has already spiked the current product. Inventory, order placing and other steps. However, in the seckill scenario, if the number of users is very large and […]
Tag: pike
[Redis] Spike business design, pessimistic lock and optimistic lock
1 Global ID generator In some cases, using the ID auto-increment of the database will cause some problems. On the one hand, the self-increment ID has obvious regularity, which may be guessed and cause some loopholes On the other hand, when the amount of data is very large, the amount of data in a single […]
Redis spike optimization (case: dark horse review)
Seckill optimization – asynchronous seckill idea (improving performance) When the user initiates a request, nginx will be requested at this time, nginx will access tomcat, and the program in tomcat will perform serial operations, divided into the following steps 1. Query coupons 2. Judging whether the seckill stock is sufficient 3. Query order 4. Check […]
Redis [practical articles] —- spike optimization
Redis【Actual Combat】—-Seckill Optimization 1. Seckill optimization – idea of asynchronous Seckill 2. Seckill optimization – Redis completes the qualification judgment of Seckill 3. Seckill optimization – complete the Seckill optimization based on the blocking queue 1. Seckill Optimization – Asynchronous Seckill Idea Let’s review the order process When the user initiates a request, nginx will […]
Eliminate inconsistencies and spikes in the original ECG signal based on matlab and separate the ECG signal into P waves, QRS waves, and T waves
?Author’s brief introduction: A Matlab simulation developer who loves scientific research. He cultivates his mind and technology at the same time. Matlab project cooperation can be privately messaged. Personal homepage: Matlab Research Studio Personal creed: Investigate knowledge. For more Matlab simulation content click Intelligent optimization algorithm Neural network prediction Radar communication Wireless sensor Power system […]
Redis [practical articles] —- Coupon spike
Redis 【Practical Combat】—- Coupon Spike 1. Globally unique ID 2. Redis implements globally unique ID 3. Add Coupon 4. Realize flash sales and place an order 5. Analysis of inventory oversold 6. Optimistic locking solves the oversold problem 7. Coupon flash sale —- one order per person 8. Concurrency issues in cluster environment 1. Global […]
Use IDEA to implement a spike system based on SpringBoot2+ mybatis+Redis
Realize a seckill system, using spring boot 2.x + mybatis + redis + swagger2 + lombok. Let me talk about the basic process first, which is to provide a seckill interface, and then limit the current for the seckill interface. At present, I have implemented two ways of current limiting. The last time I realized […]
Redis message queue (list-based message queue, PubSub-based message queue, Stream-based message queue, Stream-based message queue-consumer group, Redis-based Stream structure as a message queue, to achieve asynchronous spike)
Redis learning record on May 27, 2023 (the note document is not written by myself, it is only used as a personal learning record) 7. Redis message queue 7.1 Redis message queue – understanding message queue What is a message queue: literally means a queue for storing messages. The simplest message queue model includes 3 […]
Redis segment lock achieves ultra-high concurrency spike
Refer to Nin’s book: “Java High Concurrency Core Programming” technology free circle Business scenario It’s still a spike scene. Suppose Xiao Yang puts 6,000 single snail noodles on the shelves in the Douyin live broadcast room, buys 10 packs at a price of 9.9, and has a one-minute spike. At this time, there are 10,000 […]
Redis Coupon Spike——-Optimization
Original idea: Because the time is executed serially and the database is called multiple times, the efficiency is slow, so the concept of queue is introduced Optimization idea: Optimize the process (1: Insufficient inventory, 2: The user has already placed an order, and cannot repeat the order to ensure that one person has one order, […]