What Happens While QCUL Restores Laboratory Files and Database Data

During Undo Lab Update QCUL restores database and file checkpoint data in restartable stages, then re-establishes the current QCUL laboratory runtime and verifies the original state.

Restore sequence

  1. Move into the laboratory restore state and acquire the run/operation lock.
  2. Restore protected database state in bounded batches.
  3. Restore protected files/remove files created by the tested update as required by the checkpoint.
  4. Reapply the current QCUL runtime/marker/gate integration so an old checkpoint cannot downgrade the control endpoint.
  5. Verify the expected pre-test extension/core version and run basic laboratory checks.
  6. Record restore evidence and return the update to an appropriate testable state.

Why the page must remain open

The browser advances bounded AJAX requests. An interruption does not necessarily corrupt the restore, but you should reopen the saved operation and resume rather than starting another test while restoration is incomplete.

Preserve a known starting state

What Happens While QCUL Restores Laboratory Files and Database Data is useful only when the restore point and current laboratory belong to the same latest test operation. If you cannot prove that relationship, refresh the laboratory from current production and perform a new test rather than manually reconstructing a state and reusing old evidence.

Community Discussion

Want to compare update-testing workflows, share practical tips, or discuss how you use this QCUL feature? Visit the QC Update Laboratory Community. For private support, bug reports, account-specific issues, or feature requests, use the QuantaCade support system.