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Novembre, 2012

Home2012NovembrePage 7
On complexity and failure
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1

On complexity and failure

From a comment on Hacker News:

(link: http://news.ycombinator.com/item?id=4705387)

— quoted comment —
Full disclosure: I work for an AWS competitor.
While none of the specific AWS systemic failures may themselves be foreseeable, it is not true th…

bluermes
13 Novembre 2012
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If you trust simplicity, this could be a good argument
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1

If you trust simplicity, this could be a good argument

I assume you already read the AWS report[1] about recent troubles. I think it is a very good argument you could use at work against design complexity and in favor of designing stuff that are at a complexity level where analysis of failure modes and pre…

bluermes
13 Novembre 2012
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Why Github pull requests lack support for labels?
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2

Why Github pull requests lack support for labels?

I love Github issues, it is one of the awesome things at Github IMHO: as simple as possible but actually under the hood pretty full featured.

However one of the things I love more is labels. It is a truly powerful thing to organize issues in a project…

bluermes
13 Novembre 2012
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Designing Redis replication partial resync
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2

Designing Redis replication partial resync

In this busy days I had the idea to focus on a single, non-huge, self contained project for some time, that could allow me to work focused as much as hours as possible, and could provide a significant advantage to the Redis community.

It turns out, th…

bluermes
13 Novembre 2012
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Why it is Awesome to be a Girl in Tech
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4

Why it is Awesome to be a Girl in Tech

I’m proud to be mentioned in this well-thought and non-bigot post: http://www.nerdess.net/waffling/why-it-awesome-be-girl-tech/

Also in perfect accordance with the hacking culture, the post is sort of an HOWTO for girls that want to be involved in IT….

bluermes
13 Novembre 2012
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Client side highly available Redis Cluster, Dynamo-style.
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2

Client side highly available Redis Cluster, Dynamo-style.

I’m pretty surprised no one tried to write a wrapper for redis-rb or other clients implementing a Dynamo-style system on top of Redis primitives.

Basically something like that:

1) You have a list of N Redis nodes.
2) On write, use consistent hashing …

bluermes
13 Novembre 2012
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On the importance of testing your failover solutions.
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1

On the importance of testing your failover solutions.

From an HN comment[1]

“(Geek note: In the late nineties I worked briefly with a D&D fanatic ops team lead. He threw a D100 when he came in every morning. Anything >90 he picked a random machine to failover ‘politely’. If he threw a 100 he went to the …

bluermes
13 Novembre 2012
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Slave partial synchronization work in progress
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2

Slave partial synchronization work in progress

You can follow the commits in the next days in the “psync” branch at github:

https://github.com/antirez/redis/commits/psync
Comments

bluermes
13 Novembre 2012
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Redis data model and eventual consistency
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2

Redis data model and eventual consistency

While I consider the Amazon Dynamo design, and its original paper, one of the most interesting things produced in the field of databases in recent times, in the Redis world eventual consistency was never particularly discussed.

Redis Cluster for insta…

bluermes
13 Novembre 2012
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Welcome to RethinkDB
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1

Welcome to RethinkDB

There is a new DB option out there, I know it took a long time to be developed. While I don’t know very well how it works I hope it will be an interesting player in the database landscape.

My initial feeling is that it will compete closely with Riak a…

bluermes
13 Novembre 2012
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Optimizing the TCP/IP checksum calculation. Interesting low level journey.
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2

Optimizing the TCP/IP checksum calculation. Interesting low level journey.

Comments

bluermes
13 Novembre 2012
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Eventual consistency: when, and how?
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3

Eventual consistency: when, and how?

This post by Peter Bailis is a must read. “Safety and Liveness: Eventual consistency is not safe” [1].

[1] http://www.bailis.org/blog/safety-and-liveness-eventual-consistency-is-not-safe/

An extreme TL;DR of this is.

1) In an eventually consistent s…

bluermes
13 Novembre 2012
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notizie dai blog
1

AAA giovani digitalizzatori cercasi in Toscana

Come forse ricorderete alcuni mesi fa abbiamo firmato un importante accordo con la Confederazione Nazionale dell’Artigianato e della Piccola e Media Impresa (CNA), per trovare “giovani digitalizzatori” interessati ad aiutare le imprese italiane …

bluermes
12 Novembre 2012
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notizie dai blog
1

Tesla K20X e K20: le schede NVIDIA con GPU GK110

K20X e K20: questi i nomi scelti per identificare le due nuove schede video NVIDIA della famiglia Tesla destinate agli ambiti di GPU Computing. Nuova GPU GK110 alla base di queste soluzioni, con una potenza di elaborazione in double precision che è ne…

bluermes
12 Novembre 2012
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notizie dai blog
3

HTML5: quanto è utilizzato dagli sviluppatori?

Durante lo scorso mese di settembre, Kendo UI ha condotto una rilevazione su un campione composto da oltre 4 mila sviluppatori con lo scopo di reperire dati attendibili riguardanti il reale livello di adozione di HTML5 presso gli addetti ai lavori; i r…

bluermes
12 Novembre 2012
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