Buckle up your shoes and prepare to tackle the unique challenge of migrating web applications to Elixir.

Become an Elixir Professional

Elixir is a relatively new framework but has shown rapid growth due to its flexibility as a functional, concurrent, distributed programming language. In this module, we'll learn about adopting an Elixir-based technology stack for distributed web applications. Then, we'll learn high-level concepts such as staffing, code management, and legacy systems. We’ll also learn to develop our Elixir environment with a walkthrough of making a functional transition, distributing Elixir, and integrating external code. We'll wrap up the module by looking at deployment and maintenance functions, assessing performance, and finalizing the application.

Adopting Elixir for Software Engineering Leads & Managers

`+A` true enables kernel pooling, which provides an OS-specific I/O event notification system.

`+K` increases the async thread pool, which is a group of threads started by the VM responsible for all of the I/O work done by your code.

`+A` increases the async thread pool, which is a group of threads started by the VM responsible for all of the I/O work done by your code.

`+K` true enables kernel pooling, which provides an OS-specific I/O event notification system.

**(Select all that apply.)** What statement is correct in relation toflags?

(Select all that apply.) What statement is correct in relation toflags?

**(True or False)** The log directory must be created before we invoke `run_erl`. Otherwise, it will silently fail.




(True or False) The log directory must be created before we invoke <code>run_erl</code>. Otherwise, it will silently fail.

**(Fill in the blank.)** Using ________ restarts the application when required.

(Fill in the blank.) Using ________ restarts the application when required.

**(True or False)** Distillery, a release tool, supports multiple releases while **Mix** does not.

(True or False) Distillery, a release tool, supports multiple releases while Mix does not.

It requires heavy time investment during development and testing.

It prevents the versioning problems to the in-memory data.


It introduces the versioning problems to the in-memory data.

It requires heavy time investment during production.

**(Select all that apply.)** If hot code upgrade has the ability to upgrade the code live in production without bringing the system down, then why do we rarely see it being used in production? 


(Select all that apply.) If hot code upgrade has the ability to upgrade the code live in production without bringing the system down, then why do we rarely see it being used in production?

What do the two versions of our application run at the same time with?

What do the two versions of our application run at the same time with?

**(True or False)** In blue-green deployment, if we rename a column, blue will attempt to query the database using the old username column, which no longer exists, even before green goes live. This will lead to multiple errors.

(True or False) In blue-green deployment, if we rename a column, blue will attempt to query the database using the old username column, which no longer exists, even before green goes live. This will lead to multiple errors.

**(True or False)** In distributed Erlang, nodes cannot successfully establish connections if they share the same cookie.


(True or False) In distributed Erlang, nodes cannot successfully establish connections if they share the same cookie.

In which condition is there no need to run EPMD alongside the Erlang VM?


In which condition is there no need to run EPMD alongside the Erlang VM?

Check your understanding of coordinating deployments by taking this quiz.


Quick Quiz on Coordinating Deployments

Check your understanding of coordinating deployments by taking this quiz.

Three Adoption Stories

Concept: Team Building

Concept: Ensuring Code Consistency

Concept: Legacy Systems and Dependencies

Development: Making the Functional Transition

Development - Distributed Elixir

Development - Integrating with External Code

Production - Coordinating Deployments

Production - Metrics and Performance Expectations

Production - Making Your App Production Ready

Appendix

Conclusion

Quick Quiz on Coordinating Deployments