The QUIESCE utility establishes a quiesce point for a table space, partition, table space set, or list of table spaces and table space sets. A quiesce point is a point at which data is consistent across these objects. You can later recover a table space to its quiesce point by using the RECOVER utility.
When you request that the QUIESCE utility take a quiesce point, the quiesce point is the current log RBA or log record sequence number (LRSN). QUIESCE then records the quiesce point in the SYSIBM.SYSCOPY catalog table.
A quiesce point is not essential when you plan for point-in-time recoveries. The RECOVER utility can recover data to a prior point-in-time with consistency without a quiesce point. The utility can recover objects with transactional consistency, which means that the objects contain only data that has been committed. However, recovering objects to a quiesce point can be faster because no work must be backed out. You might also want to establish quiesce points for related sets of objects if you need to plan for a point-in-time recovery for the entire set.