Transactions
What Rad reads, writes, and commits as one unit.
A Rad transaction sees one coherent database snapshot. Its reads do not drift between statements because another request committed halfway through.
A client can send several ordered operations as one program. Later operations can use earlier results, and catalog changes are visible to later operations in the same program. Rad commits the complete program or none of it.
Conflicting work can fail with a retryable conflict. The client must decide whether it is safe to run the complete operation again.
The wire contract for these programs is PIR. Most generated-client calls create a program for you.