A rebaseline occurs when a copy of the Production database is used to overwrite a non-Production database (Dev and QA).
What happens during a rebaseline?
During a rebaseline, a snapshot of the Production environment is taken. This snapshot is then used to overwrite the target environment. All existing data in the target environment will be wiped out and replaced by Production data (except for environment/user specific API keys which are maintained)
How long do rebaselines take?
Rebaselines take approximately 1 hour to complete, during which time the environment being rebaselined is inaccessible.