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HyperDB Replication Lag Detection
Howdy – Iliya here again. Seems like I am taking over Barry’s blog. Hopefully this will motivate him to blog more. On WordPress.com we have over 218 million tables and perform tens of thousands queries per second. To scale all of this, we shard our 24 million blogs across more than 550 MySQL servers. This…
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Uptime related server crashes
This is a guest post by Iliya Polihronov. Iliya is the newest member of the global infrastructure, systems, and security team at Automattic and the first ever guest blogger here on barry.wordpress.com. Hey, my name is Iliya and as a Systems Wrangler at Automattic, I am one of the people handling the server-side issues across the 2000…
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WordPress.com DDoS Details
As you may have heard, on March 3rd and into the 4th, 2011, WordPress.com was targeted by a rather large Distributed Denial of Service Attack. I am part of the systems and infrastructure team at Automattic and it is our team’s responsibility to a) mitigate the attack, b) communicate status updates and details of the…
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Dell MD3000 Multipath on Debian
We are in the process of deploying some new infrastructure to store the 150+GB of new content (media only, not including text) uploaded to WordPress.com daily. After some searching and testing, we have decided to use the open source software MogileFS developed in part by our friends at Six Apart. Our initial deployment is going…
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WordCamp Presentations
I have uploaded my slides from WordCamp NYC and WordCamp Orlando to Slideshare. Check ’em out!
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