Bytes & B-Tree's
System Design RoadmapBytes & B-trees is a weekly newsletter for software engineers who want to understand databases from first principles — storage physics to distributed consensus. One production concept per issue, with working SQL scripts and demos in the GitHub vault.
| Platform |  | Pricing | Freemium | Publishes | Twice weekly |
|---|---|---|---|---|---|
| Issues | 20 | Founded | 3 months ago | Last Issue | 7 days ago |
| Active | |||||
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bytesbtrees.substack.comLatest Issues
Issue-015:-Pages, heaps & row storage anatomy
Every Postgres read and write moves exactly one 8,192-byte unit between disk and memory — regardless of how small the row you’re looking for.
Every Postgres read and write moves exactly one 8,192-byte unit between disk and memory — regardl...
Issue-014: Build It Yourself #1 — Part 3: Checkpointing and fast startup
Parts 1 and 2 fixed correctness and read performance.
Parts 1 and 2 fixed correctness and read performance. One problem remains: every restart scans the entire log to rebuild the index. For a 300,000-record log, that’s 600ms before the dat...
Issue 013: Build It Yourself #1 — Part 2: Adding a hash index
In Part 1 we built a crash-safe key-value store.
In Part 1 we built a crash-safe key-value store. get(”user:42”) worked correctly and survived process kills. It was also catastrophically slow — O(n) for every lookup. Today we fix that with...
Issue #012 — Build It Yourself #1, Part 1: A Crash-Safe Key-Value Store
Track: Build It Yourself | Vault: kv_store_part1.py + crash_test.py
Here is something that will change how you read every piece of database documentation: the most important primitive in database engineering is not a B-tree, not a WAL, and...
Issue #011: NULL and Three-Valued Logic: The SQL Traps That Cost You Silently
A payments company ran a daily reconciliation query for eight months before anyone noticed it was wrong.
A payments company ran a daily reconciliation query for eight months before anyone noticed it was wrong. The query aggregated transact...
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