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STORE and TurboSTORE/iX Products Manual: 900 Series HP 3000 Computer Systems > Chapter 7 TurboSTORE/iX 7x24 True-Online Backup![]() TurboSTORE/iX 7x24 True-Online Backup Options |
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This section discusses the new options available for creating TurboSTORE/iX 7x24 True-Online Backups. A TurboSTORE/iX 7x24 True-Online Backup is performed only when either the START or END parameter is included with the ONLINE option. If no parameters are specified for ONLINE, the sync point automatically occurs at the beginning of the backup, and an online backup is performed where all files must be closed for write access at that time. Up to 15 TurboSTORE/iX 7x24 True-Online Backups can be running at once. Also, a file can be stored by up to 15 7x24 true-online backups. The initiation of a 7x24 true-online backup with a logically consistent sync point is controlled by the START or END parameter with the ONLINE option. Backups created with the START parameter have the sync point at the beginning of the backup. Backups created with the END parameter have the sync point at the end of the backup. In addition to the START or END parameter, you can specify a time for the sync point to occur. The time is specified in 24-hour format (hh:mm[:ss]). If a time is specified with END, the sync point occurs at the time specified or once all files have been stored, which ever event occurs last. If a time is specified with START, the sync point occurs at the time specified, or once all files are prepared for the backup, which ever event occurs last. For example, you can initiate a backup with the following command:
If the backup completed at 17:00, TurboSTORE would continue to log changes until 17:30. It would then synchronize the databases and write the log data to the backup media. If, on the other hand, the backup did not complete until 18:00, TurboSTORE would delay the sync point until 18:00. See the "Synchronizing Multiple Applications" section later on, for more information on synchronizing all applications. If you want to be prompted during the backup to manually quiesce any other file types and/or third-party databases that are not automatically synchronized, you can use the ASK parameter. ASK makes TurboSTORE wait for you to finish these operations.
If the following backup is initiated:
TurboSTORE asks:
When all of your applications are quiesced, you should reply:
If you reply with the following:
TurboSTORE asks:
A reply of YES aborts STORE and the backup is incomplete and invalid. A reply of NO causes TurboSTORE to ask the original question:
When TurboSTORE receives a reply of YES to this question, it quiesces all TurboIMAGE and ALLBASE/SQL databases, turns on before image logging, unquiesces the databases, tells you to unquiesce all your applications, and completes the backup. You are notified on the console:
You can then perform any actions needed to unquiesce your applications. You can synchronize multiple applications in several ways. Which method you use depends on the situation and how closely you want the applications to be synchronized. When you perform multiple stores per application, they can only be approximately synchronized.
DBRECOV performs rollforward recovery of TurboIMAGE/XL databases stored using the new TurboSTORE/iX 7x24 True-Online Backup (with either the START or END option). Databases enabled for roll-back recovery are not affected by using the 7x24 true-online backup. To perform rollforward recovery of your database stored using 7x24 true-online backup, the following requirements must be adhered to:
For further information on DBRECOV, see the MPE/iX Release 5.5 (C.55.00) Communicator article, "IMAGE/SQL\with TurboIMAGE/XL Enhancements." When doing a 7x24 true-online backup, by default, TurboSTORE does not allow you to specify an incomplete TurboIMAGE or ALLBASE/SQL database to be stored. If you want to override this behavior, specify the PARTIALDB option. Any databases that are partially stored are NOT quiesced at the sync point.
Refer to the "Storing Database Files Using PARTIALDB or FULLDB" section in Chapter 6 for more information on using this option. When creating a 7x24 true-online backup with the sync point at the end of the backup, the STOREDIRECTORY option is enabled by default. To override this behavior, specify the NOSTOREDIRECTORY option. It is strongly recommended that you use the STOREDIRECTORY option when creating true-online backups with the sync point at the end of the backup. Doing so greatly increases recovery time when the backup needs to be restored. Refer to the "Creating a Disk Directory File (STOREDIRECTORY and NOSTOREDIRECTORY)" section in Chapter 6 for more detailed information on using the STOREDIRECTORY option. |
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