| 摘要 |
FIELD: information technology. ^ SUBSTANCE: database object, such as a table, set of rows or index, is divided into fragments. Each fragment is cloned to create cloned fragments, which operationally are identical to each other. One or more of the cloned fragments may be designated as a primary cloned fragment for performing database operations or as a secondary cloned fragment for serving as backup. Updates to each fragment are implemented on the primary cloned fragment and are then propagated from the primary cloned fragment to the corresponding secondary cloned fragments. ^ EFFECT: providing database backup. ^ 20 cl, 17 dwg |
