Realm of Software

Learn depth and internals of software, engineering of scale and have fun doing it!

Delve into the code, architecture, & innovations shaping our digital world.

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Original article link https://t.co/OWTqATLMYb

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Quotes from article on how #postgres indices work:

> Every table in postgres has one or more corresponding files on disk, depending on its size. This set of files is called a heap and it is divided into 8kb pages.

#database

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Multi-column indexes are generally going to be smaller and faster than using multiple indexes, but they’ll also be less flexible. The database can search for a subset of the indexed columns, as long as they are the leftmost columns.

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> If reading from registers is like getting data my head, then reading from disk is like getting data from pluto.
- CS186Berkeley

https://t.co/2HPSscu4Mx

#harddisk #storage #CS186Berkeley

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A kilobyte, kB, is an SI unit that means 1,000 bytes. A kibibyte, KiB, is an IEC-recommended unit that means 1,024 bytes.

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“Processes are entirely operating system abstractions, not something CPUs natively understand or keep track of.”

- Amazing human who built https://t.co/K7GfXC4EdW

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Domain knowledge - e.g. operator can monitor its application and react to errors with specific behavior to resolve the error instead of default behavior of restarting the containers.

#kubernetes #operators #k8s #whitepaper

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Went though the Kubernetes Operator whitepaper, here are some highlights 🧵

The core purpose of any operator is to extend its orchestrator's underlying API with new domain knowledge.

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Operational automation - Operators can extend and enhance orchestrators with higher-level automation such as deploying clustered software, providing automated backups and restores, or dynamic scaling based on load.

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@awscloud @AWS_Edu

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Today we deep dive into how S3 object storage is able to provide 11 nines of durability 🧵

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Reference - https://t.co/X1Dpc2UvN7
Further reading — https://t.co/9IGDz2OnU8