What’s on the ACID poster
A 4-row table: Property · Means.
The properties a transaction is expected to have.
- Atomicity — All of it happens, or none of it
- Consistency — Constraints hold before and after
- Isolation — Concurrent transactions do not see each other's partial work
- Durability — Once committed, it survives a crash
Isolation is the expensive one, and the one databases offer in levels — read committed, repeatable read, serialisable.
Questions about the ACID poster
- What’s on the ACID poster?
- A 4-row table: Property · Means. The properties a transaction is expected to have. Atomicity — All of it happens, or none of it; Consistency — Constraints hold before and after; Isolation — Concurrent transactions do not see each other's partial work; Durability — Once committed, it survives a crash. Isolation is the expensive one, and the one databases offer in levels — read committed, repeatable read, serialisable.
- Who is the ACID poster for?
- ACID belongs to the Computing section rather than to a school year, because computing is not something one grade owns. Anyone learning data can pin it up — a beginner, a student mid-course, or someone revising years later.
- When should you use the ACID poster?
- When a system is described as 'eventually consistent', it is these guarantees being relaxed. A wall chart earns its place by being glanceable from where the work is happening, so ACID belongs on the wall where that computing work actually happens, within glancing distance, rather than filed away.
- What other posters go with ACID?
- The CAP Theorem, Choosing a Chart and Correlation & Causation sit alongside ACID in the Computing section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.The CAP TheoremChoosing a ChartCorrelation & Causation
- Is the ACID poster free to download and print?
- Yes. ACID downloads as a free PDF with no account, no email and no watermark, like everything else in the Computing section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
- What size does the ACID poster print at?
- ACID is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of ACID loses nothing.Printing guide
Related posters
Charts that sit alongside ACID on the same wall.
Browse every Computing poster, or start from the full catalogue.