Interactive visualizations I use to explain systems concepts across posts and projects.

• database architecture
  Log-structured merge-tree (LSM Tree)

  An interactive demo of a simple LSM-based key-value storage engine: Put, Get, Delete, memtable flushes, and compaction across SSTable levels.

  Used in: Building BeachDB: A Database from Scratch (in Go) · The Memtable: where writes go to wait
• data structure
  Skip List

  A visual walkthrough of search, insert, and delete operations in a probabilistic sorted structure with fast lanes over a linked list.

  Used in: The Memtable: where writes go to wait
• syscall
  fsync() Durability

  A journey of fsync() from a Go goroutine through a Unix-like system, down the storage stack, and toward NAND gates on an SSD.

  Used in: Durability is a promise you can't hand-wave: Write-Ahead Log (WAL)