Opposite (or antonym) of transient could be:
The opposite of "persistent data" is "transient data".
it is the response of a system with respect to the input as a function of time
transient, irresolute, lazy, relenting, surrendering, yielding, temporary
The opposite of Lasting is Ceasing, ending, fleeting, passing, short-lived, temporary or transient. http://thesaurus.reference.com/
Ephemeral, evanescent, fleeting, fugacious, impermanent, temporal, temporary, transient, or transitory.
Possible antonyms (words that mean the opposite) of permanent could be "temporary" or "transient". The direct antonym is the word "impermanent".
Nature is transient.
transient market
transient market
what is the meaning of transient room
it will be transient fashions.
Average Transient Rate