non-repeatable read

non-repeatable read

🔧 Distributed Systems Reliability

a transaction modifies data that another ongoing transaction previously read (P2)

non-repeatable read in a sentence

“A non-repeatable read caused the reservation system to double-book a seat.”

Related Words

phantom read

one transaction modifies rows matching a predicate that another ongoing transaction had read (P3)

stale read

an operation begins after another ends but appears to execute before the prior operation

amnesia

a node forgets information; total amnesia means forgetting everything, partial amnesia occurs after crashes

bit rot

gradual storage corruption from cosmic rays, thermal stress, or media degradation over time

byzantine fault

a node takes arbitrary actions including malicious ones; requires more than two-thirds loyal nodes for consensus

crash

a node stops executing code until it is restarted