Redis is an open source, highly-scalable key-value store, commonly referred to as a "NoSQL database."

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How to *really* override redis configuration

I've got a Centos installation with a global redis configuration at /etc/redis.conf. Now, I want to create a configuration that will inherit from that config, overriding only some of the settings. I ...
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Best VM Specs to run Redis On Ubuntu Server 16.04 [duplicate]

I decided to use a dedicated machine(vm) for my redis key-value store but I stuck what amounts of cores/threads it needs,redis just could utilize one thread and I'm scared if I choose only one HW ...
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8 views

Redis Performance Tanks as Number of Nodes Increases

Strange problem. We have 6 nodes behind a loadbalancer. They are high-spec VPSes running Ubuntu. On a separate node we run Redis. Further nodes run MySQL. The whole LAMP setup hosts Magento. ...
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26 views

Unsubscribe scheduled to be closed ASAP for overcoming of output buffer limits.

We're seeing error similar to the following on our redis servers since we migrated our web server (redis client) from Windows 2008 R2 to Windows 2012 R2 [2455] 27 Jun 18:15:18.029 # Client addr=...
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171 views

Why is Uchiwa not able to monitor the datacenter on CentOS7?

This post combined with Install Sensu using YUM was used in order to install, configure and start Sensu and related services: sudo yum install -y erlang && \ sudo rpm -Uvh http://www.rabbitmq....
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46 views

Centos 7: Redis 3.2 not starting at boot

I installed redis 3.2 on a Centos 7 system based on this tutorial: http://linoxide.com/storage/install-redis-server-centos-7/ After that i exchanged the initScript with this from github: https://gist....
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5 views

chef-manage processes not working (redis, web and worker)

I was able to install chef-server 12 in a docker container. I was also able to access this via URL. However, to have a Management Console, it is stated that I should install chef-manage by executing ...
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7 views

All save lines are commented out in redis.conf, yet I see a repetitive persistence

I have disabled redis persistence by commenting out all save lines in /etc/redis/redis.conf file. And I've restarted my redis-server, and everything worked fine for the last two months. However ...
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1answer
55 views

Close all _existing_ TCP connections on some ports using IPTables?

Say I have a quick network partition test that I'd like to run, like disconnecting two halves of a ReDiS cluster from each other, and I want to use IPTables to temporarily disconnect one group of ...
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20 views

Connect to Redis on Azure VM [duplicate]

I have a new Windows 10 Azure VM (classic). I've installed Redis and can ping it locally using the redis-cli.exe API. 127.0.0.1:6379> ping PONG How do I ping this from my local machine? Do I ...
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62 views

Cannot set password for redis sentinel 3.2

I tried to set up redis sentinel to make it has high availability and support fail over. I begin by setup the redis replication (1 master and 2 slaves in 3 ec2-instances) And after that, i install ...
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72 views

Issues with Redis Cluster in Docker

I am running a Redis Cluster of 48 instances spread across 6 physical servers. These redis instances are running in docker containers. The cluster is designed as below: 1) 4 Docker containers for ...
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22 views

Can I use twemproxy for load balancing by redis queue size?

Can I use twemproxy as a load balancer for a pool of redis instances, according to size of redis queue (amount of keys per instance)? Is twemproxy able to turn off from the upstream one of the redis ...
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62 views

Redis & HAProxy - updated configuration settings?

Have gotten 2 Redis instances installed, with one being a master. That is working remarkably well and with no headaches. I'm now trying to get my HAProxy/keepalived nodes to handle some sort of ...
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1answer
20 views

redis: enable a disabled command at run time

This is a production instance of redis 2.8.13 on centos. In our redis.conf, we have this: rename-command CONFIG "" And now.... we want to run the latency monitor which requires that we use the ...
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1answer
166 views

Debian 8.4 jessie set open files limit for redis user

When starting redis 3.0.6 (installed from jessie-backports) under Debian 8.4 jessie, I get the following warning/error: 18127:M 13 Apr 15:12:38.730 # You requested maxclients of 10000 requiring at ...
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117 views

Redis Master/Slave Replication - Permission denied connecting to master

I'm trying to set up master/slave replication, but the slave cannot seem to connect to the master. I have two virtual servers set up on Hyper-V running Redis 2.8.19 on CentOS 7. Both servers were ...
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92 views

Redis creates many events in logstash

I'm doing some testing for a POC with logstash. When using redis to buffer messages it appears they stay in redis and continually get added to elasticsearch as new events. For example, if I restart ...
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1answer
25 views

AWS: By what IP address should I reference on an EC2 instance where is running Redis?

I have 2 EC2 instances - on one is the production app, on the other one is Redis. I connect from the first one to Redis. This is how I set Sidekiq: Sidekiq.configure_server do |config| config....
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2answers
546 views

Sensu API not responding. Uchiwa: Connection error. Is the Sensu API running? Redis Issue

I have been setting up sensu on CentOS7.2 for the first time following the official docs over and over however I have not been able to get it to work: I cannot seem to connect to the API. Uchiwa ...
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37 views

Nginx - Redis Server issue

I have an Ubuntu 14.04 VPS with multiple WP sites running in Nginx (Used this tutorial: https://deliciousbrains.com/hosting-wordpress-setup-secure-virtual-server/) When enabling Redis Server somehow ...
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64 views

Why Redis Sentinel can't manage 2 master servers?

I'm trying to configure Redis to have a master in each of our two main data centers. But the second Redis master keeps being demoted to slave of the first sentinel array. My version is 3.0.5. In each ...
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170 views

How to troubleshoot redis high CPU usage? And how to limit Redis CPU usage?

We have inherited a system in which there is a central server for queuing operations. Redis is chosen as queuing agent. Once in a while (like each 2-3 days) redis service CPU usage goes even upper ...
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15 views

Appendonly.aof is too large

My redis appendonly file fills up almost 99.9% of my system hard disk. I don't want to disable it. Is there a way to get around this so I can move partial files to another location?
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30 views

Managing sudden peak in traffic for event ticketing system

I am going to be managing an event ticketing system for a specific event. I think we will probably be expecting generally low traffic, although there's likely to be a few sudden peaks of traffic (to ...
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53 views

redis-server2 is start-stop-daemon: warning: this system is not able to track process names longer than 15 characters

So I've had the need of running 2 instances of redis in the same server. My server is an Ubuntu 14.04 box. So I followed this guide, but not in a strict way. I mean, instead of modifying redis init ...
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18 views

Redis retention - disk and memory

I am developing an application which is using Redis. It's using entries from 5 minutes, accumulating them, and sending the results somewhere. Can I configure Redis to keep 3 GB of the entries it ...
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129 views

Redis master-slave “connection lost” error

I have two docker machines: $ docker-machine ls NAME ACTIVE DRIVER STATE URL SWARM DOCKER ERRORS redis-master * virtualbox Running tcp:/...
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1answer
104 views

How do i measure redis replication delay?

Which of these can be considered to monitor replication delay ? Redis_master_repl_offset, Redis_master_last_io_seconds_ago , Redis_slave_repl_offset
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1answer
49 views

Using Redis in an untrusted environment (multiple users)

I've been doing some research into Redis and the security model. My issue is that I will have numerous users using Redis as a caching layer, each for their own applications. I'm in a shared ...
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50 views

Redis and Postgresql on same machine: vm.overcommit_memory=?

In the Redis documentation it clearly states that vm.overcommit_memory should be set to 1 to ensure background saving newer fails: http://redis.io/topics/faq HOWEVER In postgresql documentation it ...
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34 views

Redis Sentinel master not downgraded to slave immediately

I have an architecture with three Redis instances (one master and two slaves) and three Sentinel instances. In front of it there is a HaProxy. All works well until the master Redis instance goes down. ...
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63 views

How can I monitor the backlog on a Redis pubsub subscription?

As documented in an issue on Google Code, when a Redis pubsub client can't keep up with the rate at which messages are being PUBLISHed to the channel, Redis maintains an ever-growing message backlog ...
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63 views

PG, Redis, and Elasticsearch replication for 2 distant metal servers

After years of running a web app on ~15 separate VPS, I'm switching to a single physical server*. App uses 3 DBs: Postgres, Redis, and Elasticsearch, and can update to latest version on all 3. ...
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50 views

Redis unable to AUTH to Master

I was trying to do redis replication between two servers, however I got the following information in the redis log [5295] 13 Jan 12:39:30.211 * MASTER <-> SLAVE sync started [5295] 13 Jan 12:39:...
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1answer
492 views

Redis installation “make test” errors

I am getting the following errors when running a "make test" for Redis 2.8 installation on CentOS 6.7: *** [err]: Test replication partial resync: ok psync (diskless: no, reconnect: 1) in tests/...
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59 views

Unable to connect to MASTER: Resource temporarily unavailable : Connecting to MASTER no:0

I'm currently working on simle active stand/by Redis clustering for query caching with Keepalived. The problem I'm facing is when I shutdown&start(restart) the host1 server for testing, it ...
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59 views

Redis Windows maxmemory not respected

We made an upgrade from redis 2.8 to 3.0.500 In the past our redis server consumed about 1-2gb of RAM, so we defined a maxmemory of 4gb. I ensured with "config get maxmemory" that anything is ...
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22 views

// , Can I change the MASTERAUTH value on a running Redis instance in a Redis Cluster?

// , According to http://redis.io/topics/security, I can set a requirepass value, for example, requirepass foobared, in the Redis configuration files. However, I don't want this in my configuration ...
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128 views

Setting up Redis (Windows) Master-Slave Cluster “CLUSTER IS DOWN”

I've two pc's and set up a cluster the way I describe below.- Now when It ry to set a KEY i get "CLUSTERISDOWN" but the console looks like it is running.. Master Config cluster-enabled yes ...
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97 views

Redis 3.0.5 on Debian Jessie hangs on shutdown when database not in /var/lib/redis. Any ideas?

I am trying to configure redis 3.0.5 (DotDeb build) on Debian Jessie to dump the database in another directory instead of the default /var/lib/redis. I know how to do this, and in my wheezy server ...
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1answer
60 views

Limit redis connections when using PhpRedis as session store

We are using PhpRedis as a session handler for PHP sessions. Other than that, we are running a standard Apache/PHP configuration. Since we are using an external Redis-as-a-service provider, we would ...
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2answers
712 views

Redis: Error moving temp DB file on the final destination: Operation not permitted

I have a nodeBB install which relies on Redis as the data store. Its just a test install at the moment while I iron out any problems. The Redis instance stayed up for a few days but then fell over ...
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1answer
97 views

Can't touch/connect to a unix socket from the same group

sudo ls -la /var/lib/redis/6379/ produces: drwxrwxr-x 2 redis redis 4096 Nov 28 23:10 . drwx-w---- 3 redis redis 4096 Nov 22 00:10 .. srwxrwx--- 1 redis redis 0 Nov 28 23:10 redis.sock ...
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451 views

Connect remotely to ElastiCache - Redis

We are using ElastiCache - Redis for our site, we need to flush the Redis cache and when I try to connect to my ElastiCache - Redis remotely by this command from any PC redis-cli -h example-redis-1....
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1answer
49 views

Redis - Master - Master Sync without sharding

I'm currently using redis in a master -slave scenario. In my case i use redis as some kind of CacheBus and I want ot eliminate the single point of failure (if the master server goes down) Is there a ...
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2answers
775 views

Redis fails to start on OpenSuse Leap 42.1 after upgrade

I decided to upgrade a machine running 13.2 to the latest Leap 42.1. I started the process and it did the upgrade. After the reboot everything is working except for the redis server service. I can't ...
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63 views

Correctly Optimizing Redis for memory ussage

I'm a but of a newbie to systems admin & redis configuration and am trying to figure our how to optimize redis. We are running a Magento eCommerce app on an AWS m3.large EC2 instance with redis ...
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735 views

Starting Redis as a service on OS X with Homebrew

I installed Redis via brew install redis and attempted to add it as a service via: ln -sfv /usr/local/opt/redis/*.plist ~/Library/LaunchAgents launchctl load ~/Library/LaunchAgents/homebrew.mxcl....
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1k views

How to run multiple redis instances with systemd

I recently moved to Debian 8 "Jessie" which now use systemd and I can't find a way to run multiple redis instances. I found out there is a /lib/systemd/system/redis-server.service file to start redis-...