caching - Memcached vs. Redis? - Stack Overflow
Redis is more powerful, more popular, and better supported than memcached. Memcached can only do a small fraction of the things Redis can do. Redis is better even where their features overlap. For anything new, use Redis. Memcached vs Redis: Direct Comparison. Both tools are powerful, fast, in-memory data stores that are useful as a cache.
How to connect to remote Redis server? - Stack Overflow
2016年11月18日 · redis-cli Could not connect to Redis at 127.0.0.1:6379: Connection refused not connected> You'll then need to exit to get yourself out of the shell. I wasn't paying much attention here and kept passing in new redis-cli commands wondering why the command wasn't using my passed connection string.
Pipeline, watch() and multi() in redis. How do they really work?
2023年4月12日 · I'm trying to understand the correct use of commands multi and watch for the access to a database Redis. The context. I'm using: the Python Client for Redis redis-py version 3.5.3. the version of the Redis server is Redis server v=5.0.5. Other links
Does Redis use a username for authentication? - Stack Overflow
If firewalling or any other system implemented to protect Redis from external attackers fail, an external client will still not be able to access the Redis instance without knowledge of the authentication password. To safely use Redis over the network, you'd either use a network level tunnel or SSL/TLS, see:
Redis connection to 127.0.0.1:6379 failed - connect ECONNREFUSED
2012年1月6日 · I think maybe you installed redis by source code.If that you need locate to redis-source-code-path/utils and run sudo install_server.sh command. After that, make sure redis-server has been running as a service for your system sudo service redis-server status. PS: based on Debian/Ubuntu
redis - Finding keys using wildcards - Stack Overflow
2012年1月5日 · You can use the SCAN command in redis to search for keys without blocking the whole database. redis SCAN docs. This command has an optional MATCH filter that works much like the filter on the KEYS command. redis> SCAN 0 MATCH party:* 1) <the cursor> 2) 1) "party:congress:president" 2) "party:bjp:president" 3) "party:bjp" 4) "party:sena"
How do I change between redis database? - Stack Overflow
2012年11月14日 · The reason is, that redis transactions are only atomic within one db number anyway. Most (if not all) clients nicely seperate that for you in the connect() phase. And if you have to connect separately, it's just as easy to connect to a different port. The core of redis is also single threaded.
How do I delete everything in Redis? - Stack Overflow
2011年7月27日 · After you start the Redis-server using:service redis-server start --port 8000 or redis-server. Use redis-cli -p 8000 to connect to the server as a client in a different terminal. You can use either. FLUSHDB - Delete all the keys of the …
Redis is single-threaded, then how does it do concurrent I/O?
2012年5月8日 · Redis is single-threaded with epoll/kqueue and scale indefinitely in terms of I/O concurrency. I surely misunderstand the whole threading thing, because I find this statement puzzling. If a program is single-threaded, how does it do anything concurrently? Why it is so great that Redis operations are atomic, if the server is single-threaded anyway?
What's the Point of Multiple Redis Databases? - Stack Overflow
2013年4月25日 · There's one clear advantage of using redis databases in the same redis instance, and that's management. If you spin up a separate instance for each application, and let's say you've got 3 apps, that's 3 separate redis instances, each of which will likely need a slave for HA in production, so that's 6 total instances.