"Database management Access control." . . "Read only memories." . . "Algorithms." . . "Data displays." . . . . "Computer Hardware." . . "Control theory." . . "Data storage systems." . . "Computer Systems." . . "Nodes." . . "STANFORD UNIV CA DEPT OF COMPUTER SCIENCE." . . . . . . . . . . . "Read-only transactions in a distributed database"@en . . "Read-only transactions in a distributed database" . . . . . "Read-Only Transactions in a Distributed Database" . "Read-Only Transactions in a Distributed Database"@en . . . . . . . . . . . . . . . "A read-only transaction or query is a transaction which does not modify any data. Read-only transactions could be processed with general transaction processing algorithms, but in many cases it is more efficient to process read-only transactions with special algorithms which take advantage of the knowledge that the transaction only reads. This paper defines the various consistency and currency requirements that read-only transactions may have. The processing of the different classes of read-only transactions in a distributed database is discussed. The concept of R insularity is introduced to characterize both the read-only and update algorithms. Several simple update and read-only transaction processing algorithms are presented to illustrate how the query requirements and the update algorithms affect the read-only transaction processing algorithms. (Author)."@en . . . . . . . . . . . . . "Distributed databases." . . "Data bases." . . "Read out techniques." . . "Electronic data processing Distributed processing." . .