California Driving Records
How Long Does the DMV Keep My Driving Record?
According to this California DMV site, currently about 10 years but, in practice, this varies.
National Driver Registry
How to obtain your driving records from any state from the Information about the computerized national database of information about U.S. drivers who have had their licenses suspended or revoked, or who have been convicted of serious traffic violations such as DUI.
National Driving History Search
Private company provides searches of driving records by state; the price depends upon the state.
Information about expunging your conviction under California Penal Code section 1203.4. (Note: It is advisable to retain a DUI attorney, such as The Law Offices of Taylor & Taylor, for the expungement of a DUI conviction).