lost update
a committed transaction's effects are lost due to another transaction's concurrent write to the same object (P4)
lost update in a sentence
“Two users editing a wiki page simultaneously caused a lost update, discarding one set of changes.”
Related Words
dirty read
one transaction reads data written by another before that transaction has completed (P1)
non-repeatable read
a transaction modifies data that another ongoing transaction previously read (P2)
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