Taking the internal consistency and time consistency of transactions and data in embedded real-time main memory databases into consideration, we present some rules for correct recovery strategies.
Rule 8 is the same as Corollary 1, i.e., when a fault occurs, only when all consistencies of a transaction have been satisfied, then we can restart the transaction.
Therefore, they evaluate the consistency of each single transaction with the overall corporate strategy as well as with other previously executed acquisitions.
The external consistency of embedded real-time transactions requires that each transaction is in its validity internal, and all read/write operations are within its validity interval.
To ensure the consistency of tuple space, a transaction must ensure the ACID (Atomicity, Consistency, Isolation, Durability) properties [13].
The same as data consistency, transaction consistency in embedded real-time main memory database systems also include internal consistency, external consistency, and mutual consistency.
A hybrid re-broadcast/invalidation report (IR) mechanism is designed in OUFO for checking the validity of cached data items so as to improve cache consistency and minimize the overhead of transaction restarts due to data conflicts.
The mutual consistency of embedded real-time transactions means that the time interval between any two data objects is not bigger than the given value R mvi(T).
If t is an update transaction, the consistency of the values read by t are performed by the certification test.
The social time mechanism plays a crucial role because the time period is settled according to the cooperation between the upstream and the downstream, that is, settled according to the settlement conventions instead of the consistency of economic production and the transaction period.
