Disk based architecture

• the DBMS primarily stores stuff on non-violatle disk
• meaning: the DBMS’ job is to move stuff between violatle and non-volatle storage

Challenges

• how do you makue sure memory-writtten info is commited to disk?

Hierarchy model

there’s a tradeoff because as your system because faster, you have less of it and (in case its volatle) it stays around less long

Access Order

Key challenge: random-access on non-volatile storage is almost always slower than sequential access

A brain signal to help maintain glucose homeostatis

Brain takes glucose product + glucose uptake to control energy balance in food intake and energy expenditure.

The brain takes:

• Neural
• Behavioral
• Hormonal

responses to maintain glucode uptake.

A Code Review is a systematic study code by others—like proofreading an essay. There’s a few different ways of doing Code Review.

Why do we code review?

1. catch bugs, style deviations, design + convention violations
2. security trade-off: having someone who is well-versed in security is useful
3. to know how other people’s code work
4. to learn additional skills, languages, frameworks

Code Review Methodology

Don’t do it

• Very fast!
• None of the benefits of code review

Over-the-Shoulder Code Review

Over-the-Shoulder Code Review typically is done over someone’s shoulder—author walking the reviewer through code.