Freaks City

Service Name IP Addres Description proxy-server-01 10.32.161.130 Twemproxy (nutcracker) instance redis-node-01 10.32.161.131 Redis cluster node redis-node-02 10.32.161.132 Redis cluster node redis-node-03 10.32.161.133 Redis cluster node redis-node-04 10.32.161.134 Redis cluster node redis-node-05 10.32.161.135 Redis cluster no ...

The overall framework is spring-cloud-alibaba-nacos + spring-security + jwt + redis. Authorization Server a. pom.xml for the Authorization Server <!-- Spring Security, OAuth2, and JWT --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-oauth2</artifactId> ...

Redis Installation and Setup Redis 5.0+ requires GCC 9.0 or higher for compilation. # Download and extract wget http://download.redis.io/releases/redis-3.2.12.tar.gz tar xzf redis-3.2.12.tar.gz mv redis-3.2.12 /data/redis # Build from source cd /data/redis make # Configure environment vim /etc/profile export PATH=/data/redis/src:$PATH source ...

Redis provides multiple approaches for handling expired data: Immediate Expiration Handling A timer-based mechanism deletes keys precisely when their expiration time is reached. Benefits: Optimal memory usage Drawbacks: Increased CPU overhead that impacts server response times and throughput Periodic Cleanup Process The activeExpireCycle() func ...

Configuring maxmemory in Redis Estimating the Right Memory Limit Since Redis is an in-memory data store, it's wise to allocate only enough memory for frequently accessed data. The 80/20 rule (Pareto principle) often applies: about 20% of the data handles 80% of the requests. If your backing database is 10 GB, you might set Redis to 2 GB. Howeve ...

Redis operates as an in-memory data store, leveraging RAM to achieve high-speed data access. While the primary design goal is performance, relying solely on memory introduces a risk of data loss during power outages or process failures. To mitigate this, Redis provides robust persistence mechanisms to save the in-memory state to disk, allowing ...

File Hashing Strategy To establish file uniqueness, implement an MD5 hash calculation using a sampling approach. This method processes the entire first and last chunks while sampling portions of intermediate chunks: async generateFileHash(chunks) { return new Promise(resolve => { const hasher = new SparkMD5.ArrayBuffer(); const sam ...

RabbitMQ Setup with Dead Letter Handling To handle timed‑order expiry, a RabbitMQ infrastructure consisting of a direct exchange, a durable queue, and a dedicated dead‑letter exchange (DLX) is defined. The queue is declared with arguments that route expired (unconsumed) messages to the DLX after a configured TTL. Below is the Spring configurati ...

Using Jedis for Direct Redis Interaction Jedis is a lightweight Redis client for Java. To begin: Add Maven dependencies: <dependencies> <dependency> <groupId>redis.clients</groupId> <artifactId>jedis</artifactId> <version>5.0.0</version> </dependency> &l ...

Python RQ (Redis Queue) is a lightweight asynchronous task queue library built on Redis and written in Python. Its primary function is to assist developers in placing long-running tasks (such as sending emails, processing large datasets, etc.) into a queue, which are then handled asynchronously by background processes to enhance application pe ...