bkahlert

Bash Error Handling — shell options -e/errexit, inherit_errexit, -E/errtrace and the ERR trap

This Markdown file is 90% the output of error_handling.bash.

I wrote the script / this document to describe the shell options errexit, inherit_errexit, and errtrace as well as the ERR trap and their conditions and interactions in more detail as this is what I always failed to understand with the pieces of information I found so far.

References

• shell options: https://www.gnu.org/software/bash/manual/html_node/The-Set-Builtin.html

troyharvey

# Use envFrom to load Secrets and ConfigMaps into environment variables

apiVersion: apps/v1beta2
kind: Deployment
metadata:
  name: mans-not-hot
  labels:
    app: mans-not-hot
spec:
  replicas: 1

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD