Finally got our home-grown GeoDNS deployed last week, one week later than I wanted. A couple deployment issues and bug 435134 got in the way.
We’re finding all sorts of uses for this now and have moved several websites over to this and have a couple more websites/services (like IRC) scheduled for this.
Purely out of interest [...]
The Mozilla community is blessed with a lot of freely donated bandwidth through our mirror network. This network handles product downloads through bouncer and a subset of this handles releases.mozilla.org, which carries contains Firefox, Thunderbird, Camino, Seamonkey, and Sunbird releases and Add-ons (and is huge, clocking in around 100-130G).
releases.mozilla.org is handled through round-robin DNS. Regardless [...]
We’ve been pushing production traffic out of our China colo for about a month now. One of my concerns was how well this site would serve our global user base and how well the Netscaler’s dynamic GSLB would work. I didn’t want users being sent to this data center who should really goto San Jose [...]
Over the past year we’ve talked about our market share in China (since last April anyways). Li Gong joined Mozilla and in June we had an office. In August I was in China with Justin to setup office infrastructure (phones, vpn) and shop for data center space.
In December I was back [...]
Mozilla’s current GSLB (global server load balancing[1]) solution (Citrix Netscalers) is a mix of active proximity probes and static map assignments.
The algorithm first checks to see if there’s a match in the static maps and then falls back to proximity metrics. If that’s missing, it’ll round-robin through all the GSLB sites (effectively three - [...]
With little fanfare, we flipped the switch last night and started serving addons.mozilla.org out of both Amsterdam and San Jose. Took two tries and a hardware swap, but we got it!
This whole saga’s been detailed elsewhere (and here and here and here).
The Good (and the graphs)
Last time, I rolled back when Europe started waking [...]
Nearly a month after the first attempt to get AMO (addons.mozilla.org) served out of Amterdam as well as San Jose failed, we’re ready to try again!
I finally got the replacement hardware (Netscaler 9000s) in Amsterdam up this morning. During our Tuesday night maintenance window I’ll be switching DNS.
For those late to this saga, take [...]
We run our web farm behind a pair of Citrix Netscalers in both San Jose and Amsterdam. What really hits these boxes hard is the SSL offloaded traffic and in certain instances has caused the Netscalers to fall over on themselves.
Right now our setup looks like:
(Pardon the shapes, it’s what I have to work [...]
