In computer science, particularly the field of databases, the Thomas Write rule is a rule in timestamp-based concurrency control.
It states that, if a more recent transaction has already written the value of an object, then a less recent transaction does not need perform its own write since it will eventually be overwritten by the more recent one.
For example:
Assuming that the timestamp of T1 is less than that of T2, T1's write is discarded.
If TS(T)
Famous quotes containing the words write and/or rule:
“Perfect Scepticisme ... is a disease incurable, and a thing rather to be pitied or laughed at, then seriously opposed. For when a man is so fugitive and unsettled that he will not stand to the verdict of his own Faculties, one can no more fasten any thing upon him, than he can write in the water, or tye knots in the wind.”
—Henry More (16141687)
“The earliest instinct of the child, and the ripest experience of age, unite in affirming simplicity to be the truest and profoundest part for man. Likewise this simplicity is so universal and all-containing as a rule for human life, that the subtlest bad man, and the purest good man, as well as the profoundest wise man, do all alike present it on that side which they socially turn to the inquisitive and unscrupulous world.”
—Herman Melville (18191891)