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transactional message
A message containing transactional data.
transactional shadowing
A process by which identical transactional data are written
to separate disks often at separate sites to increase data
availability in the event of site failure. See also disk shadowing.
two-phase commit
A database commit/rollback concept that works in two steps: 1.
The coordinator asks each local recovery manager if it is able
to commit the transaction. 2. If and only if all local recovery
managers agree that they can commit the transaction, the
coordinator commits the transaction. If one or more recovery
managers cannot commit the transaction, then all are told to roll
back the transaction. Two- phase commit is an all-or-nothing
process: either all of a transaction is committed, or none of it is.
WAN
Wide area network.
Glossary–10