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Juho Garo Mäkinen's blog | Useful learnings from software engineering.

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Juho Garo Mäkinen's blog
Running Kubernetes at home for fun and profit.
Test Driven Development on an SQL Database Schema
Having Fun With IoT
Problems with Terraform due to the restrictive HCL.
Cassandra cluster migration story
Problems With Node.JS Event Loop
Using HAProxy to do health checks to gRPC services
When Just IOPS Aren’t Enough – Optimal EBS Bandwidth Calculation
Q&A on MongoDB backups on Amazon EC2
Windows script to convert video into jpeg sequence
DNA Welho cable modem IPv6 with Ubiquiti EdgeMax
Presentation slides on our CI pipeline with Docker
Continuous Integration pipeline with Docker
Comparing Kubernetes with Orbit Control
Tips and caveats for running MongoDB in production
Great Chinese Firewall DDOSing websites
Raspberry Pi as a 3G to WiFi access point and home automation
Quick way to analyze MongoDB frequent queries with tcpdump
How to establish and run a techops team
Avointa maastotietodataa – löytyisikö sitä uutta kiipeiltävää?
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Useful learnings from software engineering.
The building blocks: hardware.
The building blocks: storage.
The building blocks: networking.
The building blocks: Single Sign On.
The building blocks: basic software.
The building blocks: Continuous deployment with Gitlab.
What next?
Applying TDD to SQL
Example
All the things where Raspberry Pi is useful!
All the things where a Raspberry Pi is too big
Using Raspberry Pi to log temperatures
Using MQTT public-subscribe messaging for connecting everything together.
Building a WiFi connected LCD display
When do I need to add more wood to the stove?
Conclusions
Template evaluation.
Module variables
Variables are not really variables
Control structures and iteration
Workarounds?
Migration plan
Compaction phase
Incremental repairs
Conclusions
What The Event Loop Is?
Handling Concurrent Requests
Now The Problems Start To Accumulate
Problems With Different End Users
Problems Measuring Internal Latencies
Measuring Event Loop Latency
Use Statsd / Graphite To Collect Measurements
Conclusion
High level anatomy of a CI server
Services for development environment and when running unit tests
Build sequence
Service naming in testing, staging and production
Conclusion
Slave with replication lag can get slaveOk=true queries
Reconfiguring cluster often causes it to drop primary database for 10-15 seconds.
Keep your oplog big enough, but cluster size small enough.
A word on backups
Watch out for orphan Map-Reduce operations
Get top collections which are getting queries:
Knowing how your production runs
Monitoring your production
Design and implement meaningful alerts to your environment
Do not accept single point of failures
Automate as much as you can
Conclusions
Siirry yleiskarttaan tästä.
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