Releng 2015 CFP now open

>> Thursday, December 11, 2014

Florence, Italy.  Home of beautiful architecture.

Il Duomo di Firenze by ©runner310, Creative Commons by-nc-sa 2.0


Delicious food and drink.

Panzanella by © Pete Carpenter, Creative Commons by-nc-sa 2.0

Caffè ristretto by © Marcelo César Augusto Romeo, Creative Commons by-nc-sa 2.0


And next May, release engineering :-)

The CFP for Releng 2015 is now open.  The deadline for submissions is January 23, 2015.  It will be held on May 19, 2015 in Florence Italy and co-located with ICSE 2015.   We look forward to seeing your proposals about the exciting work you're doing in release engineering!

If you have questions about the submission process or anything else, please contact any of the program committee members. My email is kmoir and I work at mozilla.com.

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Mozilla pushes - November 2014

>> Wednesday, December 03, 2014

Here's November's monthly analysis of the pushes to our Mozilla development trees.  You can load the data as an HTML page or as a json file.

Trends
Not a record breaking month, in fact we are down over 2000 pushes since the last month.

Highlights
10376 pushes
346 pushes/day (average)
Highest number of pushes/day: 539 pushes on November 12
17.7 pushes/hour (average)

General Remarks
Try keeps had around 38% of all the pushes, and gaia-try has about 30%. The three integration repositories (fx-team, mozilla-inbound and b2g-inbound) account around 23% of all the pushes.

Records
August 2014 was the month with most pushes (13,090  pushes)
August 2014 has the highest pushes/day average with 422 pushes/day
July 2014 has the highest average of "pushes-per-hour" with 23.51 pushes/hour
October 8, 2014 had the highest number of pushes in one day with 715 pushes    







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Scaling capacity while saving cash

>> Wednesday, November 12, 2014

There was a very interesting release engineering summit this Monday held in concert with LISA in Seattle.  I was supposed fly there this past weekend so I could give a talk on Monday but late last week I became ill and was unable to go.   Which was very disappointing because the summit looked really great and I was looking forward to meeting the other release engineers and learning about the challenges they face.

Scale in the Market  ©Clint Mickel, Creative Commons by-nc-sa 2.0

Although I didn't have the opportunity to give the talk in person, the slides for it are available on slideshare and my mozilla people account   The talk describes how we scaled our continuous integration infrastructure on AWS to handle double the amount of pushes it handled in early 2013, all while reducing our AWS monthly bill by 2/3.

Cost per push from Oct 2012 until Oct 2014. This does not include costs for on premise equipment. It reflects our monthly AWS bill divided by the number of monthly pushes (commits).  The chart reflects costs from October 2012-2014.

Thank you to Dinah McNutt and the other program committee members for organizing this summit.  I look forward to watching the talks once they are online.

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Mozilla pushes - October 2014

Here's the October 2014 monthly analysis of the pushes to our Mozilla development trees.  You can load the data as an HTML page or as a json file.

Trends
We didn't have a record breaking month in terms of the number of pushes, however we did have a daily record on October 18 with 715 pushes. 

Highlights
12821 pushes, up slightly from the previous month
414 pushes/day (average)
Highest number of pushes/day: 715 pushes on October 8
22.5 pushes/hour (average)

General Remarks
Try keeps had around 39% of all the pushes, and gaia-try has about 31%. The three integration repositories (fx-team, mozilla-inbound and b2g-inbound) account around 21% of all the pushes

Records
August 2014 was the month with most pushes (13,090  pushes)
August 2014 has the highest pushes/day average with 422 pushes/day
July 2014 has the highest average of "pushes-per-hour" with 23.51 pushes/hour
October 8, 2014 had the highest number of pushes in one day with 715 pushes




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Mozilla pushes - September 2014

>> Monday, October 27, 2014

Here's September 2014's monthly analysis of the pushes to our Mozilla development trees.
You can load the data as an HTML page or as a json file.


Trends
Suprise!  No records were broken this month.

Highlights
12267 pushes
409 pushes/day (average)
Highest number of pushes/day: 646 pushes on September 10, 2014
22.6 pushes/hour (average)

General Remarks
Try has around 36% of pushes and Gaia-Try comprise about 32%.  The three integration repositories (fx-team, mozilla-inbound and b2g-inbound) account around 22% of all the pushes.

Records
August 2014 was the month with most pushes (13,090  pushes)
August 2014 has the highest pushes/day average with 620 pushes/day
July 2014 has the highest average of "pushes-per-hour" with 23.51 pushes/hour
August 20, 2014 had the highest number of pushes in one day with 690 pushes





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Release Engineering in the classroom

The second week of October, I had the pleasure of presenting lectures on release engineering to university students in Montreal as part of the PLOW lectures at École Polytechnique de Montréal.    Most of the students were MSc or PhD students in computer science, with a handful of postdocs and professors in the class as well. The students came from Montreal area universities and many were international students. The PLOW lectures consisted of several invited speakers from various universities and industry spread over three days.

View looking down from the university

Université de Montréal administration building

École Polytechnique building.  Each floor is painted a different colour to represent a differ layer of the earth.  So the ground floor is red, the next orange and finally green.

The first day, Jack Jiang from York University gave a talk about software performance engineering.
The second day, I gave a lecture on release engineering in the morning.  The rest of the day we did a lot of labs to configure a Jenkins server to build and run tests on an open source project. Earlier that morning, I had setup m3.large instances for the students on Amazon that they could ssh into and conduct their labs.  Along the way, I talked about some release engineering concepts.  It was really interesting and I learned a lot from their feedback.  Many of the students had not been exposed to release engineering concepts so it was fun to share the information.

Several students came up to me during the breaks and said "So, I'm doing my PhD in release engineering, and I have several questions for you" which was fun.  Also, some of the students were making extensive use of code bases for Mozilla or other open source projects so that was interesting to learn more about.  For instance one research project looking at the evolution of multi-threading in a Mozilla code bases, and another student was conducting bugzilla comment sentiment analysis.  Are angry bug comments correlated with fewer bug fixes?  Looking forward to the results of this research!

I ended the day by providing two challenge exercises to the students that they could submit answers to.  One exercise was to setup a build pipeline in Jenkins for another open source project.  The other challenge was to use a the Jenkins REST API to query the Apache projects Jenkins server and present some statistics on their build history.  The results were pretty impressive!

My slides are on GitHub and the readme file describes how I setup the Amazon instances so Jenkins and some other required packages were installed before hand.  Please use them and distribute them if you are interested in teaching release engineering in your classroom.

Lessons I learned from this experience:
  • Computer science classes focus on writing software, but not necessarily building it is a team environment. So complex branching strategies are not necessarily a familiar concept to some students.  Of course, this depends on the previous work experience of the students and the curriculum at the school they attend. One of students said to me "This is cool.  We write code, but we don't build software".
  • Concepts such as building a pipeline for compilation, correctness/performance/
    regression testing, packing and deployment can also be unfamiliar.   As I said in the class, the work of the release engineer starts when the rest of the development team things they are done :-)
  • When you're giving a lecture and people would point out typos, or ask for clarification I'd always update the repository and ask the students to pull a new version.  I really liked this because my slides were in reveal.js and I didn't have to export a new PDF and redistribute.  Instant bug fixes!
  • Add bonus labs to the material so students who are quick to complete the exercises have more to do while the other students complete the original material.  Your classroom will have people with wildly different experience levels.
The third day there was a lecture by Michel Dagenais of Polytechnique Montréal on tracing heterogeneous cloud instances using (tracing framework for Linux).  The Eclipse trace compass project also made an appearance in the talk. I always like to see Eclipse projects highlighted.  One of his interesting points was that none of the companies that collaborate on this project wanted to sign a bunch of IP agreements so they could collaborate on this project behind closed doors.  They all wanted collaborate via an open source community and source code repository.  Another thing he emphasized was that students should make their work available on the web, via GitHub or other repositories so they have a portfolio of work available.  It was fantastic to seem him promote the idea of students being involved in open source as a way to help their job prospects when they graduate!

Thank you Foutse and  Bram  for the opportunity to lecture at your university!  It was a great experience!  Also, thanks Mozilla for the opportunity to do this sort of outreach to our larger community on company time!

Also, I have a renewed respect for teachers and professors.  Writing these slides took so much time.  Many long nights for me especially in the days leading up to the class.  Kudos to you all who do teach everyday.

References
The slides are on GitHub and the readme file describes how I setup the Amazon instances for the labs

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Beyond the Code 2014: a recap

I started this blog post about a month ago and didn't finish it because well, life is busy.  

I attended Beyond the Code last September 19.  I heard about it several months ago on twitter.  A one-day conference about celebrating women in computing, in my home town, with an fantastic speaker line up?  I signed up immediately.   In the opening remarks, we were asked for a show of hands to show how many of us were developers, in design,  product management, or students and there was a good representation from all those categories.  I was especially impressed to see the number of students in the audience, it was nice to see so many of them taking time out of their busy schedule to attend.

View of the Parliament Buildings and Chateau Laurier from the MacKenzie street bridge over the Rideau Canal
Ottawa Conference Centre, location of Beyond the Code
 
There were seven speakers, three workshop organizers, a lunch time activity, and a panel at the end. The speakers were all women.  The speakers were not all white women or all heterosexual women.  There were many young women, not all industry veterans :-) like me.  To see this level of diversity at a tech conference filled me with joy.  Almost every conference I go to is very homogenous in the make up of the speakers and the audience.  To to see ~200 tech women in at conference and 10% men (thank you for attending:-) was quite a role reversal.

I completely impressed by the caliber of the speakers.  They were simply exceptional.

The conference started out with Kronda Adair giving a talk on Expanding Your Empathy.  One of the things that struck me from this talk was that she talked about how everyone lives in a bubble, and they don't see things that everyone does due to privilege.  She gave the example of how privilege is like a browser, and colours how we see the world.  For a straight white guy a web age looks great when they're running the latest Chrome on MacOSx.  For a middle class black lesbian, the web page doesn't look as great because it's like she's running IE7.  There is less inherent privilege.  For a "differently abled trans person of color" the world is like running IE6 in quirks mode. This was a great example. She also gave a shout out to the the Ascend Project which she and Lukas Blakk are running in Mozilla Portland office. Such an amazing initiative.

The next speaker was Bridget Kromhout who gave talk about Platform Ops in the Public Cloud.
I was really interested in this talk because we do a lot of scaling of our build infrastructure in AWS and wanted to see if she had faced similar challenges. She works at DramaFever, which she described as Netflix for Asian soap operas.  The most interesting things to me were the fact that she used all AWS regions to host their instances, because they wanted to be able to have their users download from a region as geographically close to them as possible.  At Mozilla, we only use a couple of AWS regions, but more instances than Dramafever, so this was an interesting contrast in the services used. In addition, the monitoring infrastructure they use was quite complex.  Her slides are here.

I was going to summarize the rest of the speakers but Melissa Jean Clark did an exceptional job on her blog.  You should read it!

Thank you Shopify for organizing this conference.  It was great to meet some many brilliant women in the tech industry! I hope there is an event next year too!

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Mozilla Releng: The ice cream

>> Wednesday, September 17, 2014

A week or so ago, I was commenting in IRC that I was really impressed that our interns had such amazing communication and presentation skills.  One of the interns, John Zeller said something like "The cream rises to the top", to which I replied "Releng: the ice cream of CS".  From there, the conversation went on to discuss what would be the best ice cream flavour to make that would capture the spirit of Mozilla releng.  The consensus at the end was was that Irish Coffee (coffee with whisky) with cookie dough chunks was the favourite.  Because a lot of people like on the team like coffee, whisky makes it better and who doesn't like cookie dough?

I made this recipe over the weekend with some modifications.  I used the coffee recipe from the Perfect Scoop.  After it was done churning in the ice cream maker,  instead of whisky, which I didn't have on hand, I added Kahlua for more coffee flavour.  I don't really like cookie dough in ice cream but cooked chocolate chip cookies cut up with a liberal sprinkling of Kahlua are tasty.

Diced cookies sprinkled with Kahlua

Ice cream ready to put in freezer

Finished product
I have to say, it's quite delicious :-) If I open source ever stops being fun, I'm going to start a dairy empire.  Not really. Now back to bugzilla...

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Mozilla pushes - August 2014

>> Wednesday, September 10, 2014

Here's August 2014's monthly analysis of the pushes to our Mozilla development trees.  You can load the data as an HTML page or as a json file.



Trends
It was another record breaking month.  No surprise here!

Highlights

  • 13090 pushes
    • new record
  • 422 pushes/day (average)
    • new record
  • Highest number of pushes/day: 690 pushes on August 20.  This same day corresponded with our first day where we ran over 100,000 test jobs.
    • new record
  • 23.12 pushes/hour (average)

General Remarks
Both Try and Gaia-Try have about 36% each of the pushes.  The three integration repositories (fx-team, mozilla-inbound and b2g-inbound) account around 21% of all the pushes.


Records
August 2014 was the month with most pushes (13,090  pushes)
August 2014 has the highest pushes/day average with 620 pushes/day
July 2014 has the highest average of "pushes-per-hour" with 23.51 pushes/hour
August 20, 2014 had the highest number of pushes in one day with 690 pushes






Read more...

Mozilla pushes - July 2014

>> Friday, August 08, 2014

Here's the July 2014 monthly analysis of the pushes to our Mozilla development trees. You can load the data as an HTML page or as a json file.
 
Trends
Like every month for the past while, we had a new record number of pushes. In reality, given that July is one day longer than June, the numbers are quite similar.

Highlights

  • 12,755 pushes
    • new record
  •  411 pushes/day (average)
  • Highest number of pushes/day: 625 pushes on July 3, 2014
  • Highest 23.51 pushes/hour (average)
    • new record

General remarks
Try keeps on having around 38% of all the pushes. Gaia-Try is in second place with around 31% of pushes.  The three integration repositories (fx-team, mozilla-inbound and b2g-inbound) account around 22% of all the pushes.

Records 
July 2014 was the month with most pushes (12,755 pushes)
June 2014 has the highest pushes/day average with 662 pushes/day
July 2014 has the highest average of "pushes-per-hour" with 23.51 pushes/hour
June 4th, 2014 had the highest number of pushes in one day with 662 
 

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