preface
The popularity of Redis, I believe that I need not say more, now large Internet companies basically need to use Redis technology. Redis as one of the most popular in-memory database, through reading and writing data in memory, greatly improved the speed of reading and writing, it can be said that Redis is an indispensable part of the realization of high concurrency website.
However, for the use of Redis, I believe that there are still a lot of people do not know how to use Redis, there are also many small and medium-sized enterprises have not used Redis, but now the requirements of large factories, the use of Redis need to be skilled and master, therefore, learning Redis is urgent.
The good news is that a treasure of technical notes was released today. Redis technical notes sorted out by Tencent technical experts have been downloaded more than 30 million times. Now share out, need friends, click here you can download free screenshots.
First, the previous Redis mind brain map
This set of Redis thinking mind maps or very detailed, specific content is more, the pictures show is “contracted”, in fact there will be more complete content, not “+” key, Redis mind mapping can be better to help us understand the content of this note, also let us in learning to Redis has a more clear thinking.
Redis Mind Map content:
- Basic data structures and their applications: string + list + set + ordered set + hash
- Redis is used to implement distributed locks
- Persistence: AOF+RDB
- How to solve multithreading competition problem
- Inconsistency between database and cache double-write
- The transaction
- How to ensure high availability
- The sentry
- The cluster
- Interview questions related
Then, the main course: Redis technical notes
1. Know Redis (Introduction to Redis + Introduction to Redis data structure)
2. Use Redis to build Web applications (login and cookie caching + Shopping cart + Web page caching + data row caching + Web page analysis)
3.Redis command (string + list + set + hash + ordered set + publish and subscribe + other commands)
4. Data security and performance assurance (Persistence options + replication + handling system failures +Redis transactions + non-transactional pipeline + notes on performance)
5. Use Redis to build support programs (use Redis to keep diaries + counters and statistics + find IP city and country + discovery and configuration of services)
6. Build application components using Redis (auto complete + distributed lock + count semaphore + task queue + message pull + File distribution using Redis)
7. Search-based applications (search using Redis + ordered indexing + AD targeting + Job search)
8. Build a simple social network (users and status + home page timeline + List of followers and current followers + Post and delete status messages + streaming API)
9. Reduce memory footprint (short structure + fragmented structure + packed storage binary bytes)
10. Extend Redis (extend read performance + extend write performance and memory capacity + extend complex queries)
11. Lua scripting for Redis (adding new features without writing C code + rewriting locks and semaphores using Lua + removing WATCH/MULTI/EXEC transactions + sharding lists using Lua)
Finally, the Redis interview questions should also be included
1. Why Redis? / Why cache?
2. Why use Redis instead of Map/Guava?
3. The difference between Redis and memcached
4. Redis common data structure and application scenario analysis
5. Redis sets the expiration time
6. Redis memory flushing mechanism (MySQL has 2000W data, redis only 20W data, how to ensure that redis database is hot data?)
7. Redis persistence mechanism (how to ensure that redis hangs and then restarts data can be recovered?)
8. Redis transactions
9.Redis common exceptions and solutions
10. Common application scenarios in the distributed environment
11.Redis cluster mode
12. How to solve the problem of concurrent competing keys in Redis?
13. How to ensure data consistency between the cache and the database in double-write mode?
Redis interview questions (108 questions)
conclusion
What techniques should you learn as a Java programmer? If you go to any job search website and look at the job requirements, it will be clear that your skills and abilities will affect your working environment and social status. So, learn some big factory technology is a hundred li no harm.
This Redis technical note is highly recommended and downloads speak for themselves. Don’t worry, the notes are free to share, just you: forward + comment articles, follow me, click here to download free with screenshots.