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Redis Sentinel provides a simple and automatic high availability (HA) solution for Redis. If you’re familiar with how MongoDB elections work, this isn’t too far off. To start, you have a given master replicating to N number of slaves. From there, you have Sentinel daemons running, be it on your application servers or on the servers Redis is running on. These keep track of the master’s health.
Redis uses a very straightforward command line interface. Though it's relatively simple, it does provide some interesting features that one might not expect. Let's go over some of the basics and work our way around most of the client's functionality and features.
Hashes in Redis are a way to store associated field-value pairs under a single key, where both the field and values are strings. Redis allows for modifications to both the data structure as a whole, and also to each field in the structure. This makes it a great (and very fast) backing store for objects in an application.
In Matthew Barker's Getting started with Redis post, we covered the 5 data structures in Redis. This overview will cover some key operations and common uses, along with security options and a few simple example scripts.
RedisConf is just around the corner! We’ve got a full day of inspiring keynotes, intensely practical sessions,
and plenty of fun networking when we gather next Thursday, March 5th, at the Innovation Hanger located at 3601 Lyon Street in San Francisco. With over 300 registrants and 20 speakers from big names like Hulu, Pivotal, Heroku, VMware and RedisLabs, it’s an event you don’t want to miss.
Jens Heyens, Kai Greshake, and Eric Petryka at CISPA recently published a paper entitled "MongoDB databases at risk - Several thousand MongoDBs without access control on the Internet". The paper outlines that basic security practices have not been followed by a large number of internet accessible MongoDB installations.