In the example below, database writes are concurrent at the points in time t1 and t2 and happen before a sync can communicate the changes. However, writes at times t4 and t6 are not concurrent as a sync happened in between.
| Time | CRDB Instance1 | CRDB Instance2 |
|---|---|---|
| t1 | SET key1 "a" | |
| t2 | SET key1 "b" | |
| t3 | — Sync — | — Sync — |
| t4 | SET key1 "c" | |
| t5 | — Sync — | — Sync — |
| t6 | SET key1 "d" |