garbage read
a database returns an object version not produced by any write, often from corruption or race conditions
garbage read in a sentence
“A garbage read returned zeros for a record that had never been written to that address.”
Related Words
lost update
a committed transaction's effects are lost due to another transaction's concurrent write to the same object (P4)
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