Questions tagged [redis]

Redis is an open source, advanced key-value store. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets and sorted sets.

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What's the best practice when deploying Redis replication cluster on 2 data centers connected by MPLS?

I deployed Redis replication cluster on 2 data centers (ping time between 2 DCs is around 1ms). I used Master (Node1 on DC 1) - Slave (Node2 in DC2) replication model and Sentinel to control ...
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577 views

Redis along with Mysql

I'm currently working on a mobile app alike Google Maps or Wave, but also including parking. The application its running with MySQL primarily. With at this stage most of our data is loaded by python ...
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Redis Cluster monitoring

In some limited testing with Redis Cluster I've identified the following conditions where a failed master would be unable to failover: The obvious, all the slaves have failed All of a master's slaves ...
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Redis Performance Optimization - Does a slave's replication take as much compute resources as being a master?

I have the need for two desperate Redis Instances. One's job is mostly as a session store (currently deployed), the others role will be as an usage statistics depot. Assume my servers are single-...
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Building Timeline Feature with Complex Post Object Via Mongo and Redis

So I have a scenario where I want to build a timeline for an app. I haven't done this particular thing before, but since I work mostly in mongo my first instinct was to query to get the user's ...
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is there a documented limit to the number of slaves you can have in redis?

I'm trying to find any documentation about the maximum number of slaves you can set up in a redis master / slave configuration. We can potentially have 200 slaves. If there is a limit, I might ...
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Redis INCR resetting

We're running a Redis 2.8.4 instance on a Ubuntu 14.04 server where we're experiencing problems with a key that's being reset to 0. It's a key we're only running INCR commands on, but every few ...
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499 views

Redis master and slave use different memory

I deployed a redis replica set which consist of one master and one slave. From top command output, I figure out each memory usage. master: 8176352Byte * 8.5% = 678MB slave: 2050116Byte * 75.6% = ...
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Checking status of replication in Redis Cluster

Suppose I have a cluster of 3 master nodes. All the masters have already got a lot of data and now I try to add some nodes as slaves. I want to understand if the new slaves will be ready as soon as ...
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Order of Execution of Pipelined Commands for Same HashSlot w/ Redis Cluster

So I have a Redis Cluster of n master nodes, and my client connects to some random master node. It then issues a pipelined batch of commands say.. SET {abc}.x 5 SET {abc}.y 3 SET {abc}.z 1 Assume ...
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What are the built-in default configuration values of redis.conf?

If I omit a configuration option in redis.conf, what value will be used upon running redis? The self-documented redis.conf states that just rarely. I have found (but didn't try yet) this command: ...