Redis is an in-memory but persistent on disk database, so it represents a different trade off where very high write and read speed is achieved with the limitation of data sets that can’t be larger than memory. Another advantage of in memory databases is that the memory representation of complex data structures is much simpler … Read more
Add slashes to quotes set test “{\”a\”:\”b\”}”
I use golang (https://github.com/garyburd/redigo) and connect to aliyun cloud Redis (link: https://www.aliyun.com/product/kvstore?spm=5176.8006303.267657.7.cW2xH) By the connect string: redis://arbitrary_usrname:password@ipaddress:6379/0 when 0 is the database index and success
No, Redis doesn’t have a notion of a global/default TTL and yes, you do have to set it for each key independently. However, depending on your requirements and on what you’re trying to do, there may be other ways to achieve your goal. Put differently, why do you need it? For example, if you want … Read more
By default, redis has 16 databases, which can be addressed by their indexes. This is what it’s for. See SELECT command.
All your questions are answered at the EVAL page, but since you asked…: What is the difference? KEYS is used to pass key names whereas ARGS should be for anything else. This isn’t exactly enforced (i.e. most times you’d be ok mixing them) but could lead to potential problems if not followed. How does Redis … Read more
If you can’t use MIGRATE COPY because of your redis version (2.6) you might want to copy each key separately which takes longer but doesn’t require you to login to the machines themselves and allows you to move data from one database to another. Here’s how I copy all keys from one database to another … Read more
You can connect from redis-cli or redis-benchmark simply by using the -s option and providing the path of your unix domain socket. For instance: redis-cli -s /tmp/redis.sock redis-benchmark -q -n 10000 -s /tmp/redis.sock
With Spring Data Redis 2.0, those methods have been deprecated. You now need to configure using RedisStandaloneConfiguration Reference: https://docs.spring.io/spring-data/redis/docs/current/api/org/springframework/data/redis/connection/jedis/JedisConnectionFactory.html#setHostName-java.lang.String- Example: JedisConnectionFactory jedisConnectionFactory() { RedisStandaloneConfiguration redisStandaloneConfiguration = new RedisStandaloneConfiguration(“localhost”, 6379); redisStandaloneConfiguration.setPassword(RedisPassword.of(“yourRedisPasswordIfAny”)); return new JedisConnectionFactory(redisStandaloneConfiguration); }
Current development version of redis contains a new feature: keyspace notifications. Documentation: http://redis.io/topics/notifications Keyspace notifications allows clients to subscribe to Pub/Sub channels in order to receive events affecting the Redis data set in some way. Examples of the events that is possible to receive are the following: All the commands affecting a given key. All … Read more