Infrastructure load for December 2013 and January 2014

(Context: In case people missed this transition, my last day at Mozilla was Dec31, so obviously, I’m not going to be doing these monthly infrastructure load posts anymore. I started this series of posts in Jan2009, because the data, and analysis, gave important context for everyone in Mozilla engineering to step back and sanity-check the scale, usage patterns and overall health of Mozilla’s developer infrastructure. The data in these posts have shaped conversations and strategy within Mozilla over the years, so are important to continue. I want to give thanks to Armen for eagerly taking over this role from me during my transition out of Mozilla. Those of you who know Armen know that he’ll do this exceedingly well, in his own inimitable style, and I’m super happy he’s taken this on. I’ve already said this to Armen privately over the last few months of transition details, but am repeating here publicly for the record – thank you, Armen, for taking on the responsibility of this blog-post-series.)

December saw a big drop in overall load – 6,063 is our lowest load in almost half-a-year. However, this is no surprise given that all Mozilla employees were offline for 10-14 days out of the 31days – basically a 1/3rd of the month. At the rate people were doing checkins for the first 2/3rds of the month, December2013 was on track to be our first month ever over 8,000 checkins-per-month.

January saw people jump straight back into work full speed. 7,710 is our second heaviest load on record (slightly behind the current record 7,771 checkins in August2013).

Overall load since Jan 2009

Those are my quick highlights. For more details, you should go read Armen’s post for Dec2013 and post for Jan2014 yourself. He has changed the format a little, but the graphs, data and analysis are all there. And hey, Armen even makes the raw data available in html and json formats, so now you can generate your own reports and graphs if interested. A very nice touch, Armen.

John (still cheering from the sidelines).

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