- \n
- Presenter: Izabel Jeleni\u0107, Co-founder, CTO<\/li>\n
- infobip<\/a>\u00a0– 600+ employees (122 devs)<\/li>\n
- Worldwide A2P SMS traffic is expected to grow. Revenue > 45bn.<\/li>\n
- They handle 150M<\/strong> transactions daily.<\/li>\n
- They said they’re doing business with “one big social” network, but they didn’t name it actually, I wonder why is that (some kind of NDA or what? \ud83d\ude42<\/em>)<\/li>\n
- Picture time:
\n![\"infobip_intro\"](\"http:\/\/www.nikola-breznjak.com\/blog\/wp-content\/uploads\/2015\/06\/infobip_intro.jpg\")
<\/a><\/li>\n<\/ul>\nHow we ended up doing continuous delivery<\/h4>\n
- \n
- Presenter: Mario \u017dagar, Senior Software Architect<\/li>\n
- ASAP and as often we have to go into production<\/li>\n
- Unit & integration tests<\/li>\n
- Scaling cube<\/a><\/li>\n
- First they scaled by increasing monoliths<\/li>\n
- Then they took some parts out of the monolith (API, Billing, Inbound SMS, …) => easier to focus, possible to deploy independently<\/li>\n
- Typical feature deployment today:\n
- \n
- Short lived feature branches with Git<\/li>\n
- Develop & run tests locally<\/li>\n
- Push feature branch to remote repository (Stash<\/a>)<\/li>\n
- Jenkins – CI server builds the feature branch<\/li>\n
- Deployment artifacts published to Infobip repository (Artifactory<\/a>)<\/li>\n
- Deploy feature branch to integration environment<\/li>\n
- Run tests on integration environment<\/li>\n
- Merge pull request to master branch & release<\/li>\n<\/ul>\n<\/li>\n
- Average about 80 deploys per day<\/strong><\/li>\n
- DevOps culture – you built it, you deploy it, you support it<\/li>\n
- Troubleshooting tools:\n
- \n
- Graylog<\/a><\/li>\n
- Graphite<\/a><\/li>\n
- Grafana<\/a><\/li>\n
- Nagios<\/a><\/li>\n
- Seyren<\/a><\/li>\n
- HipChat<\/a><\/li>\n
- Ansible<\/a><\/li>\n<\/ul>\n<\/li>\n
- Picture time:
\n![\"infobip_ci_intro\"](\"http:\/\/www.nikola-breznjak.com\/blog\/wp-content\/uploads\/2015\/06\/infobip_ci_intro.jpg\")
<\/a><\/li>\n- And a few more here, since, well, you know I love MEMEs<\/a>:
\n![\"infobip_ci_deploy\"](\"http:\/\/www.nikola-breznjak.com\/blog\/wp-content\/uploads\/2015\/06\/infobip_ci_deploy.jpg\")
\n<\/a>![\"infobip_ci_devops\"](\"http:\/\/www.nikola-breznjak.com\/blog\/wp-content\/uploads\/2015\/06\/infobip_ci_devops.jpg\")
<\/a><\/li>\n<\/ul>\nScrum experience<\/h4>\n
- \n
- Presenter: Marko Stipanov, Product Owner<\/li>\n
- How to increase productivity?\n
- \n
- hiring more devs?<\/li>\n
- best is to hire someone new and give them some totally new project<\/li>\n<\/ul>\n<\/li>\n
- PDD – Panic Driven Development<\/strong>\n
- \n
- the bigger the panic the greater priority<\/li>\n
- how relates to this, please hands up\u00a0
![\"hand_rock_n_roll\"](\"http:\/\/www.nikola-breznjak.com\/blog\/wp-content\/uploads\/2015\/06\/hand_rock_n_roll.png\")
<\/a><\/em><\/li>\n<\/ul>\n<\/li>\n- they tried with daily report writing<\/li>\n
- Agile process manifesto<\/a><\/li>\n
- they divided their 60 devs at a time to 12 teams and each team works on a small project<\/li>\n
- Product Owner\n
- \n
- vision and definition of products<\/li>\n
- goal setting<\/li>\n
- priority setting of the whole team<\/li>\n
- talks to stakeholders<\/li>\n<\/ul>\n<\/li>\n
- Scrum ceremonies\n
- \n
- organisation<\/li>\n
- iterative process<\/li>\n<\/ul>\n<\/li>\n
- Scrum steps (they do the sprints fro 1-2 weeks instead of 2-4):\n
- \n
- Product backlog<\/li>\n
- Sprint backlog<\/li>\n
- SPRINT<\/li>\n
- Deliverable<\/li>\n<\/ul>\n<\/li>\n
- 1 project = 1 team<\/strong><\/li>\n
- 1 team => more projects<\/strong><\/li>\n
- Priorities are defined by business value<\/li>\n
- Kanban, Scrumban<\/li>\n
- Daily team lead meeting with just few minutes<\/li>\n
- You can’t do agile without teams!<\/strong><\/li>\n
- Scrum definitely give us a better intercommunication.<\/li>\n
- Picture time:
\n![\"infobip_scrum\"](\"http:\/\/www.nikola-breznjak.com\/blog\/wp-content\/uploads\/2015\/06\/infobip_scrum.jpg\")
<\/a><\/li>\n<\/ul>\nModern SQL<\/h4>\n
- \n
- Presenter: Markus Winand, SQL expert and author
\n![\"modernsql_intro\"](\"http:\/\/www.nikola-breznjak.com\/blog\/wp-content\/uploads\/2015\/06\/modernsql_intro.jpg\")
<\/a><\/li>\n- SQL 99 broke the relational standard\n
- \n
- LATERAL\n
- \n
- “for each” loop of SQL<\/li>\n<\/ul>\n<\/li>\n
- WITH\n
- \n
- “private methods” of SQL<\/li>\n<\/ul>\n<\/li>\n
- WITH RECURSIVE\n
- \n
- “while” loop of SQL<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n
- SQL 2003\n
- \n
- Turing complete<\/li>\n
- OVER and PARTITION BY\n
SELECT dep, salary, SUM(salary) OVER (PARTITION BY dep) FROM ...<\/pre>\n<\/li>\n
- OVER and GROUP BY\n
- \n
- actually, do this in the application, thank you very much<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n
- SQL 2008\n
- \n
- SELECT TOP is not official – it’s FETCH FIRST ROWS ONLY<\/li>\n<\/ul>\n<\/li>\n
- SQL 2011\n
- \n
- OFFSET is EVIL\n
- \n
- http:\/\/use-the-index-luke.com\/<\/a>\u00a0
![\"modernsql_offset\"](\"http:\/\/www.nikola-breznjak.com\/blog\/wp-content\/uploads\/2015\/06\/modernsql_offset.jpg\")
<\/a><\/li>\n- Also, the author was cool and he was giving these stickers:
\n![\"modernsql_offset_badges\"](\"http:\/\/www.nikola-breznjak.com\/blog\/wp-content\/uploads\/2015\/06\/modernsql_offset_badges.jpg\")
<\/a><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\nIndexes: The neglected performance all-rounder<\/h4>\n
- \n
- Presenter: Markus Winand, SQL expert and author<\/li>\n
- 50% SQL problems are caused by poor query\/indexing
\n![\"index_comic\"](\"http:\/\/www.nikola-breznjak.com\/blog\/wp-content\/uploads\/2015\/06\/index_comic.jpg\")
<\/a><\/li>\n- CREATE INDEX is not<\/strong>\u00a0in the standard!<\/li>\n
- The solution- indexing is a development task!<\/li>\n
- \u00a0And now the author hits the spots when he explains that in\n
- \n
- 11 SQL books he analyzed only 1%<\/strong> of the pages are about indexes<\/li>\n
- 14 database administration books he analyzed only 6%<\/strong>\u00a0of the pages are about indexes<\/li>\n<\/ul>\n<\/li>\n
- \n
Everybody knows indexing is important for performance, yet nobody takes the time to learn and apply it properly.<\/p><\/blockquote>\n<\/li>\n<\/ul>\n
Personal and Interpersonal Effectiveness<\/h4>\n
- \n
- Presenter: Danilo Goliani, PhD professor, enterpreneur<\/li>\n
- Our clients are paying our paychecks!<\/strong><\/li>\n
- Personal effectiveness – others have faith in\u00a0me<\/li>\n
- Team effectiveness – I have faith in others<\/li>\n
- Organisational effectiveness – clients love us<\/li>\n
- Stephen R. Covey: 7 Habits of Highly Effective People<\/a><\/li>\n
- Courage – willingness and ability to express your thoughts and emotions<\/li>\n
- Don’t just say NO to your children – explain also WHY<\/li>\n
- Self induced interrupt<\/li>\n
- Brain Games<\/li>\n
- Picture time:
\n![\"danilo\"](\"http:\/\/www.nikola-breznjak.com\/blog\/wp-content\/uploads\/2015\/06\/danilo.jpg\")
<\/a><\/li>\n<\/ul>\nMachine learning<\/h4>\n
- \n
- Presenter: Jan \u0160najder, PhD\/assistant professor\/FER<\/li>\n
- IBM Watcson Developer Cloud<\/li>\n
- 88% of unstructured data<\/li>\n
- #1 Top skill on LinkedIn 2014<\/li>\n
- Tools:\n
- \n
- Weka<\/a><\/li>\n
- RapidMiner<\/a><\/li>\n
- Orange<\/a><\/li>\n
- R<\/a> (mother of all)<\/li>\n
- Matlab<\/a> (commercial)<\/li>\n
- mloss.org<\/a><\/li>\n
- Apache Mahout<\/a><\/li>\n
- Spark<\/a><\/li>\n
- Azure Machine Learning<\/a><\/li>\n
- Amazon Machine Learning<\/a><\/li>\n<\/ul>\n<\/li>\n
- Picture time:
\n![\"machine\"](\"http:\/\/www.nikola-breznjak.com\/blog\/wp-content\/uploads\/2015\/06\/machine.jpg\")
<\/a><\/li>\n<\/ul>\nJava puzzlers<\/h4>\n
- \n
- Presenter: Aleksandar Dosti\u0107, Senior Software Engineer IB<\/li>\n
- Picture time intro:
\n![\"java_intro\"](\"http:\/\/www.nikola-breznjak.com\/blog\/wp-content\/uploads\/2015\/06\/java_intro.jpg\")
<\/a><\/li>\n- Puzzle 1:
\n![\"java_1\"](\"http:\/\/www.nikola-breznjak.com\/blog\/wp-content\/uploads\/2015\/06\/java_1.jpg\")
<\/a><\/li>\n- Puzzle 2:
\n![\"java_2\"](\"http:\/\/www.nikola-breznjak.com\/blog\/wp-content\/uploads\/2015\/06\/java_2.jpg\")
<\/a><\/li>\n- Puzzle 3:
\n![\"java_3\"](\"http:\/\/www.nikola-breznjak.com\/blog\/wp-content\/uploads\/2015\/06\/java_3.jpg\")
<\/a><\/li>\n- Puzzle 4:
\n![\"java_4\"](\"http:\/\/www.nikola-breznjak.com\/blog\/wp-content\/uploads\/2015\/06\/java_4.jpg\")
<\/a><\/li>\n- Puzzle 5 – the most sneaky one!
\n![\"java_5\"](\"http:\/\/www.nikola-breznjak.com\/blog\/wp-content\/uploads\/2015\/06\/java_5.jpg\")
\n<\/a>and here is why!!!\u00a0![\"shocked\"](\"http:\/\/www.nikola-breznjak.com\/blog\/wp-content\/uploads\/2015\/06\/shocked.png\")
<\/a>![\"java_5_explanation\"](\"http:\/\/www.nikola-breznjak.com\/blog\/wp-content\/uploads\/2015\/06\/java_5_explanation.jpg\")
<\/a><\/li>\n<\/ul>\nHA-JDNI as a Solution for Service Discovery in Distributed Systems<\/h4>\n
- Puzzle 1:
- RapidMiner<\/a><\/li>\n
- Weka<\/a><\/li>\n
- 14 database administration books he analyzed only 6%<\/strong>\u00a0of the pages are about indexes<\/li>\n<\/ul>\n<\/li>\n
- CREATE INDEX is not<\/strong>\u00a0in the standard!<\/li>\n
- Also, the author was cool and he was giving these stickers:
- http:\/\/use-the-index-luke.com\/<\/a>\u00a0
- OFFSET is EVIL\n
- SQL 99 broke the relational standard\n
- 1 team => more projects<\/strong><\/li>\n
- Graphite<\/a><\/li>\n
![\"ha\"](\"http:\/\/www.nikola-breznjak.com\/blog\/wp-content\/uploads\/2015\/06\/ha.jpg\")
<\/a><\/li>\n<\/ul>\n