Editing
Fault Tolerance
Jump to navigation
Jump to search
Warning:
You are not logged in. Your IP address will be publicly visible if you make any edits. If you
log in
or
create an account
, your edits will be attributed to your username, along with other benefits.
Anti-spam check. Do
not
fill this in!
== Fault Tolerance == [[File:Fault-tolerance-icon.png|right|thumb|200px|Fault Tolerance Icon]] '''Fault tolerance''' is a key feature of the [[Elixir (programming language)|Elixir programming language]]. It refers to the ability of a system to continue operating properly in the presence of faults, which may be caused by hardware or software failures, network issues, or other unexpected circumstances. == Overview == Fault tolerance in Elixir is achieved through a combination of language features and best practices. Elixir provides a robust supervision tree mechanism that allows developers to build fault-tolerant systems easily. The supervision tree ensures that processes are monitored and automatically restarted when failures occur. By structuring the program as a supervision tree, developers can isolate and handle failures on a per-process basis, leading to increased resilience and fault tolerance. Each process in the tree is supervised by a higher-level process, which ensures that any crashes or failures are appropriately managed. == Supervision Trees == Supervision trees are the core of fault tolerance in Elixir. A supervision tree is a hierarchical structure that defines the relationships between processes in an Elixir application. By organizing processes into separate supervisors and workers, developers can manage failures and isolate their impact. In a supervision tree, each process is associated with a supervisor. The supervisor is responsible for managing the process and monitoring it for errors. If a process crashes, the supervisor will restart it, ensuring that the system remains operational and resilient. Supervisors can be organized in a hierarchical manner, allowing for even more fault tolerance. If a process supervised by a higher-level supervisor crashes and is unable to restart, the higher-level supervisor can escalate the error to its supervisor, triggering a recovery process at a higher level. This cascading approach ensures that failures are handled gracefully at all levels of the system. == Handling Failures == In Elixir, the preferred way to handle failures is through the use of supervisors and the `:restart` strategy. When a process fails, its supervisor can be configured to restart the process automatically. This approach not only restores the system to a known good state but also allows for the underlying cause of the failure to be addressed. Additionally, supervisors can be configured to limit the number of restarts within a certain time frame. This prevents an infinite restart loop in situations where a process repeatedly crashes due to unresolved issues. By setting thresholds for restarts, developers can ensure that failures are appropriately handled while avoiding excessive resource consumption. == Conclusion == Fault tolerance is a critical aspect of building reliable and resilient systems. The supervision tree mechanism in Elixir provides a powerful tool for handling failures and building fault-tolerant applications. By organizing processes into supervisors and taking advantage of the `:restart` strategy, developers can ensure that their Elixir applications can withstand unexpected errors and continue operating reliably. See also: * [[Supervisors (Elixir)|Supervisors]] * [[Elixir (programming language)]] * [[Concurrency (Elixir)]] * [[Error Handling (Elixir)]] {{ElixirProgramming}} [[Category:Elixir (programming language)]] [[Category:Fault Tolerance]]
Summary:
Please note that all contributions to Elixir Wiki may be edited, altered, or removed by other contributors. If you do not want your writing to be edited mercilessly, then do not submit it here.
You are also promising us that you wrote this yourself, or copied it from a public domain or similar free resource (see
Elixir Wiki:Copyrights
for details).
Do not submit copyrighted work without permission!
Cancel
Editing help
(opens in new window)
Template used on this page:
Template:ElixirProgramming
(
edit
)
Navigation menu
Personal tools
Not logged in
Talk
Contributions
Create account
Log in
Namespaces
Page
Discussion
English
Views
Read
Edit
View history
More
Navigation
Main page
Recent changes
Random page
Help about MediaWiki
Tools
What links here
Related changes
Special pages
Page information