Exploring synchronous replication in Redis Redis uses streamed asynchronous replication, that’s one of the simplest forms of replication you can imagine: a continuos stream of writes is sent to the slaves, without waiting for the slaves to process the writes in any way before replying to the client. I always gave that almost for granted, as
Availability on planet Terah Terah is a planet far away, where networks never split. They have a single issue with their computer networks, from time to time, single hosts break in a way or the other. Sometimes is a broken power supply, other times a crashed disk, or a software issue completely blocking the
Reply to Aphyr attack to Sentinel In a great series of articles Kyle Kingsbury, aka @aphyr on Twitter, attacked a number of data stores: [1] http://aphyr.com/tags/jepsen Postgress, Redis Sentinel, MongoDB, and Riak are audited to find what happens during network partitions and how these systems can provide the claimed guarantees. Redis is attacked here: http://aphyr.com/posts/283-call-me-maybe-redis I said that Kyle “attacked”
Redis configuration rewriting Lately I’m trying to push forward Redis 2.8 enough to reach the feature freeze and release it as a stable release as soon as possible. Redis 2.8 will not contain Redis Cluster, and its implementation of Redis Sentinel is the same as 2.6 and unstable branches, (Sentinel is taken mostly in
Hacking Italia Questo post ha lo scopo di presentare alla comunita’ italiana interessata ai temi della programmazione e delle startup un progetto nato attorno ad un paio di birre: “Hacking Italia”, che trovate all’indirizzo http://hackingitalia.com Hacking Italia e’ un sito di “social news”, molto simile ad Hacker News, il celebre collettore di news
The Lean Architect Contrary to popular belief, the concepts of lean delivery and architecture are not mutually exclusive. The practices of architecture design are in many senses wasteful, but waste isn’t a simple thing to define. Many types of wasteful activity are in fact highly valuable in the longer term.
Redis with an SSD swap not what you want Hello! As promised today I did some SSD testing. The setup: a Linux box with 24 GB of RAM, with two disks. A) A spinning disk. b) An SSD (Intel 320 series). The idea is, what happens if I set the SSD disk partition as a swap partition and fill Redis with a dataset
Log driven programming is a real productivity booster One thing, more than everything else, keeps me focused while programming: never interrupt the flow. If you ever wrote some complex piece of code you know what happens after some time: your mental model of the software starts to be very complex with different ideas nested inside other ideas, like the
An idea for Twitter After the “sexism gate” I started to use my Twitter account only for private stuff in order to protect the image of Redis and/from my freedom to say whatever I want. It did not worked actually since the reality is that people continue to address you with at-messages about Redis
News about Redis 28 is shaping Im back on Cluster This is a very busy moment for Redis because the new year started in a very interesting way: 1) I finished the Partial Resynchronization patch (aka PSYNC) and merged it into the unstable and 2.8 branch. You can read more about it here: http://antirez.com/news/47 2) We finally have keyspace changes notifications: http://redis.io/topics/notifications Everything