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Displaying posts with tag: facebook (reset)
Twitter, Facebook MySQL trees online – pushing MySQL forward

Just yesterday, I’m sure many saw Twitter opensourcing their MySQL implementation. It is based on MySQL 5.5 and the code is on Github.

For reference, the database team at Facebook has always been actively blogging, and keeping up their code available on Launchpad. Its worth noting that the implementation there is based on MySQL 5.0.84 and 5.1.

At Twitter, most of everything persistent is stored in MySQL – interest graphs, timelines, user data and those precious tweets themselves! At Facebook, its pretty similar – all user interactions like likes, shares, status updates, requests, etc. are all stored in MySQL ( …

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Why software patents are evil

Mark Cuban is no fool. A tech billionaire, the no-nonsense owner of the Dallas Mavericks is just the sort of person you'd expect to value software patents. So the title of his blog post this Tuesday, "I hope Yahoo crushes Facebook in its patent suit," may not look out of place to you.

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On InnoDB compression in production

Our latest changes have been pushed to public mysql@facebook branch, allowing this post to happen \o/

Recently we started rolling out InnoDB compression to our main database tier, and that has been a huge undertaking for multiple teams and a major test for MySQL. Nizam was sure the hero of all this work, and make sure you don’t miss his talk about it at MySQL conference.

Though MySQL manuals have quite some introduction about benefits of compression, we agree that benefits are good – in theory we can do less reads from disk, keep more data in buffer pool or flashcache and take less …

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Can the People's House become a social platform for the people?

InSourceCode developers work on "Madison" with volunteers.

There wasn't a great deal of hacking, at least in the traditional sense, at the "first congressional hackathon." Given the general shiver that the word still evokes in many a Washingtonian in 2011, that might be for the best. The attendees gathered together in the halls of the United States House of Representatives didn't create a more interactive visualization of how laws are made or a mobile health app. As open government advocate Carl Malamud observed, the "hack" felt like something even rarer in the "Age of the App for That:"

Impressed @MattLira pulled off a truly bipartisan tech event on the hill. …

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on MySQL replication prefetching

For the impatient ones, or ones that prefer code to narrative, go here. This is long overdue anyway, and Yoshinori already beat me, hehe…

Our database environment is quite busy – there’re millions of row changes a second, millions of I/O operations a second and impact of that can be felt at each shard. Especially, as we also have to replicate to other datacenters, single threaded replication on MySQL becomes a real bottleneck.

We use multiple methods to understand and analyze replication lag composition – a simple replication thread state sampling via MySQL processlist helps to understand logical workload components (and work in that field yields great results), and pstack/GDB …

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Find us on Facebook

We have launched our new Facebook page!

On connections

MySQL is needlessly slow at accepting new connections. People usually work around that by having various sorts of connection pools, but there’s always a scale at which connection pools are not feasible. Sometimes connection avalanches come unexpected, and even if MySQL would have no trouble dealing with queries, it will have problems letting clients in. Something has to be done about it.

Lots of these problems have been low hanging fruits for years – it ‘was not detected’ by benchmarks because everyone who benchmarks MySQL would know that persistent connections are much faster and therefore wouldn’t look at connection speeds anymore.

Usually people attribute most of slowness to the LOCK_thread_count mutex – they are only partially right. This mutex does not just handle the counter of active running connections, but pretty much every operation that deals with increase or decrease of threads (thread cache, active thread …

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Facebook Open Graph Meta WordPress Plugin

Have you ever noticed that, if you implemented Facebook like or Facebook Share in wordpress blog and when people click Like the shared post on user wall looks not good most of the time. This is because you didn’t implement the facebook open graph meta data in your blog post or page. As a result when facebook parse the link sometimes they can’t parse it properly that you expected.

To solve the situation you’ve to add open graph meta data in your site. Some days ago I manually added this in my blog’s theme, but later I decided to make a wordpress plugin so that it become easier to use and share with others.

My plugin features:

1. Automatically set facebook open …

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Facebook praises Tungsten

"Tungsten has made huge strides this year in performance and usability."

451 CAOS Links 2011.07.08

Harmony disharmony. Microsoft’s Android revenue. And more.

# The Harmony Project released version 1.0 of its templates for standard contributor license agreements prompting comment and criticism from Dave Neary, Stephen Walli, Richard Fontana and Bradley M Kuhn.

# Microsoft reportedly demanded $15 for each Android smartphone handset made by Samsung, while the company …

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