Arthur Costa

Concept. DDIA chapter 5 in a career: work is the leader that takes production writes, my own time is the follower that replays the same concerns later, and the lag between them is measured in years from the records.

Front page. It is the replication itself: the leader’s committed writes are my results at work, arrows carry them across a lag gutter, and the follower column is my face being applied write by write, with my own-time result on top.

Information architecture. One replication log, sorted by lag like a replication dashboard: each row pairs a leader write with the follower’s applied version only where both have a year; the earlier roles sit in one outlined leader-only row, and own-time work with no leader write is filed as written straight to the follower.

Portrait and type. The ribbon portrait is the follower’s state, rows applied top-down as you read; the contact section shows both replicas in sync. Schibsted Grotesk, drawn for a newspaper, sets the headlines and text, because replication is publishing editions of one story; IBM Plex Mono is kept for positions and counters.

Colour and motion. Newsprint and ink; spruce only for writes in flight and terracotta only for writes lost in failover, always with a word or an X. Writes travel the gutter at a speed set by their lag; every figure is drawn complete at rest and replays from the start when it comes into view.

Accessibility. The ribbon’s Pause control stops the photo, the rows and both drills; reduced motion shows every end state; figures are hidden from assistive technology and each has its text beside it, and the drill writes its own log.