Lecture 14: Advanced Concurrency and Block Devices

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Overview

Learning Objectives

Global Interpreter Lock

Python’s GIL

Why the GIL? Garbage Collection

Instruction Reordering and Caching

Challenges Beyond Interleaving

Out-of-Order Execution

CPU Cache Coherence

Concluding Advice

Block Devices

Byte-Addressable vs. Block-Addressable Storage

Optimizing Disk I/O with Caching and Buffering

Small Reads Performance

Hard Disk Drives (HDDs)

Capacity vs. I/O and Short Stroking

Solid State Drives (SSDs)

Flash Storage

Write Amplification

HDDs vs. SSDs

Partitions and RAID

Partitions

RAID

Conclusion

Source