Viewing profile — barsxl

Automattic | Remote | Full-time | Senior Systems Engineer (Systems Wrangler) | $110-$210k+ We're looking for the world's best systems engineers to help build and maintain the infra…

Automattic | Remote | Full-time | Senior Systems Engineer (Systems Wrangler) We're looking for the world's best systems engineers to help build and maintain the infrastructure that…

Automattic | Remote | Full-time | Senior Systems Engineer (Systems Wrangler) We're looking for the world's best systems engineers to help build and maintain the infrastructure that…

Thanks for the heads up. We have removed this file from the platform for now while we review.

Thanks for pointing that out. I fixed the post.

> Can you elaborate just a smidge? Is WordPress.com, for example, not encrypting content when it's requested by iTunes? (Thanks!) Yes, we have some targeted exceptions for incompat…

Many of the larger webhosts have free (but not mandatory) SSL support in production, beta, or on their near-term roadmap.

This happens with the https:// vary rarely. The http:// case happens more often. This is one of the complications in adding HSTS headers with includeSubDomains. Right now, the http…

Photon[0] does exactly this (and more!) and is free to use as part of Jetpack[1] 0. http://developer.wordpress.com/docs/photon/ 1. https://wordpress.org/plugins/jetpack/

Yes, we're working on it.

> I believe it's breaking podcast feeds being served with WordPress.com, because iTunes doesn't support Let's Encrypt certificates. Do you have an example? We have already implemen…

WordPress.com offers two-step authentication for all of our users. You can use any application which supports Time-Based One-Time Passwords (TOTP) such as Google Authenticator, Aut…

WordPress.com has pretty sophisticated brute force detection mechanisms and protections in place. I am not sure why you would say otherwise.

The majority of our transient bugs on WordPress.com are probably related to APC opcode issues. We try to catch them and handle it gracefully, but it isn't always so easy.

Of the 2000 servers, about 90% of them are running something related to WordPress.com. There are 36 "load balancer" servers in total. I added up the req/sec across those 36 machine…

WordPress.com currently has 12 load balancers per data center. They are HA and used for different subsets of traffic.

We started using Percona's MySQL builds by default a couple of years ago. There are some nice performance and convenience features not included in the MySQL.com builds. (Un)fortuna…

Many more dynamic pages than you would expect. We do hundreds of thousands of database queries/sec. We do some caching with Batcache - http://wordpress.org/extend/plugins/batcache/…

As with any tiered web application, the requests aren't evenly distributed across all the servers :) Most of our main Nginx proxies serve about 5k req/sec and have about 50k establ…

WordPress.com hasn't run on FreeBSD since the TextDrive days which was way before Layered Tech, before me and before WordPress.com was open to the public. We are 100% Debian today,…

We serve about 150k req/sec from the CDN. That (obviously) isn't included in the 70k number from the article. The 70k is only what we are serving from the origin.