We switched from redis to hazelcast for our caching needs. Protostuff + Hazelcast is much faster for us than Protostuff + Jedis (pooled) + Redis We use protostuff to serialize beans that are expensive to create. Hazelcasts standard-serialization mechanism is much slower. Our environment is Glassfish 3.1. Hazelcast looks like they only have java libs, … Read more
There are 3 parts to a lock: the key (the unique name of the lock in the database) the value (a caller-defined token which can be used both to indicate who “owns” the lock, and to check that releasing and extending the lock is being done correctly) the duration (a lock intentionally is a finite … Read more
You cannot. Redis is a key-value store, not a relational database. In order to search for a specific data, you need to build an access path to this data. For instance, to get the users having age = 25, you need to build an index to map the age values to users. It can be … Read more
I found the solution. I think it will help for others | systemctl unmask servicename $ sudo systemctl unmask redis-server.service
There are several questions here. 1) Why we can’t execute increment in transaction that can’t be interrupted by other command? Please note first that Redis “transactions” are completely different than what most people think transactions are in classical DBMS. # Does not work redis.multi() current = redis.get(‘powerlevel’) redis.set(‘powerlevel’, current + 1) redis.exec() You need to … Read more
I had this same problem, but I forgot that redis persists. If you get this error, try this command: redis-cli ping if you get PONG as a response, then Redis is running, and the port is in use, by Redis.
You need to set up an index using sets or sorted sets that you write to when you save anything. There’s a good writeup at http://web.archive.org/web/20121013063245/http://playnice.ly/blog/2010/05/05/a-fast-fuzzy-full-text-index-using-redis that is pretty close to what I use myself.
Redis’ maxmemory volatile-lru policy can fail to free enough memory if the maxmemory limit is already used by the non-volatile keys.
If it has to be answered in one word, its “performance”. Aerospike’s performance is much better than any clustered-nosql solutions out there. Higher performance per-node means smaller cluster which is lower TCO (Total Cost of Ownership) and maintenance. Aerospike does auto-clustering, auto-sharding, auto-rebalancing (when cluster state changes) most of which needs manual steps in other … Read more
You need to provide more information about your environment (OS, Docker installation, etc), but basically, if you start your Redis container like this: docker run –name=redis-devel –publish=6379:6379 –hostname=redis –restart=on-failure –detach redis:latest It should expose the port no matter what. The only reason you might not be able to connect to it, is if you’ve messed … Read more