optimistic

adj

1. Expecting the best in all possible ways.

   “in an optimistic mood”

   “optimistic plans”

   “took an optimistic view”

   “Reference was made in the January-February issue to some of the optimistic railway titles of the past, such as the Manchester & Milford, and the Lancashire, Derbyshire & East Coast, neither of which got anywhere near the extremities indicated in their titles during their independent existence.”

2. Allowing other processes to perform transactions on the same data at the same time, and checking for conflicts only when changes need to be written back.

   “optimistic concurrency”

   “optimistic locking”