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- You cannot remove files or pages from a roll forward set, but you can add them. 不能刪除前滾集中的文件或頁,但可以添加它們。
- A roll forward set is defined by restoring a series of one or more data backups. 前滾集是通過還原一系列的一個或多個數據備份來定義的。
- The oldest file or page in the roll forward set determines the starting point for the next phase: redo (roll forward). 前滾集中最早的文件或頁將決定下一階段(重做,即前滾)的起點。
- Otherwise, all files in the backup being restored are included in the roll forward set. 否則,備份中所有正被還原的文件都將包括在前滾集中。
- Pages in the roll forward set are overwritten with any more recent ones from the differential backup. 前滾集中的頁將由差異備份中較新的頁覆蓋。
- If a RESTORE statement specifies filegroups, files, or pages, only these items are included in the roll forward set. 如果RESTORE語句指定了文件組、文件或頁,則前滾集中將僅包括這些項。
- To apply logged changes to the data in a roll forward set to bring the data forward in time. 將所記錄的更改應用於前滾集中的數據以使該數據及時前滾。
- A roll forward set is defined by restoring one or more full backups, such as a database or partial backup or a set of file backups. 前滾集定義為包括一個或多個完整備份(例如資料庫備份、部分備份或一組文件備份)的還原操作。
- In these cases, the Database Engine issues an informational message stating that the roll forward set can now be recovered by sing the RECOVERY option. 在這種情況下,資料庫引擎將發出信息性消息,聲明現在可以使用RECOVERY選項恢復前滾集。
- If the whole roll forward set is consistent with the database, recovery is performed, and the database can be brought online. 如果整個前滾集與資料庫一致,則執行恢復,並且可使資料庫在線。
- Restoring a log backup rolls forward all pages in the roll forward set. 還原日誌備份將對前滾集中的所有頁進行前滾。
- In some cases RESTORE WITH NORECOVERY rolls the roll forward set far enough forward that it is consistent with the database. 在某些情況下,RESTORE WITH NORECOVERY會將前滾集滾動到足夠靠前的位置,使它與資料庫一致。
- If the roll forward set has not been rolled forward far enough to be consistent with the database, the undo phase cannot occur. 如果前滾集前滾得不夠遠,無法與資料庫一致,則不會出現撤消階段。
- If the roll forward set has not been rolled forward far enough to be consistent with the database and RECOVERY is specified, the Database Engine issues an error. 如果前滾集尚未前滾到與資料庫保持一致的地步,並且指定了RECOVERY,則資料庫引擎將發出錯誤。
- Changing the Roll Forward Set After Roll Forward Has Started 啟動前滾之後更改前滾集
- Roll forward continues from this point. 前滾將從此點繼續進行。
- Roll forward to the end of logs and complete. 前滾到日誌的結束,然後完成備份。
- LSN at which the next roll forward must start. 下一次前滾必須開始時的LSN。
- However, read-only files that are consistent with the database can be added to the roll forward set without repeating any of the roll forward; for more information, see 但是,可以將與資料庫一致的只讀文件添加到前滾集中,無須重複任何前滾;有關詳細信息,請參閱
- LSN at which the online roll forward on this file can stop. 對此文件的在線前滾可以停止時的LSN。