two-phase commit
<database> A technique for maintaining integrity in distributed
databases. Where a system uses two or more database, a transaction among the
distibuted database should be atomic ("all or nothing"). This is done by
handling the transaction in two phases. First the databases prepare the
transaction, confirm that it is possible to process it, and lock the relevant
record.
Once all the required databases confirm that the transaction is viable, the
system instructs them all to commit it - i.e. to make it permanent. If it is not
possible to process it, the system will instruct the databases to rollback
(undo) the transaction.
(2000-02-28)
Nearby terms:
.twmrc « two-binary, one-quaternary « twonkie «
two-phase commit » twos complement »
two-to-the-N » two-valued logic
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