History File Recovery
A DELTA PLUS History File recovery is required after an I/O error (or other type of error) occurs on one of the History File data sets. If the History File recovery process does not clear the problem, you will need to rebuild and/or expand your DELTA PLUS History File data sets.
To recover and expand your History File data sets
- Quiesce all DELTA PLUS request processing on all IMS systems that use the History File.
- Copy the current DELTA PLUS History File to a backup data set using IEBGENER or equivalent.
- Delete the current History File data sets using ISPF options.
- Reallocate and reformat the new, larger DELTA PLUS History File data sets. The Allocate New DELTA PLUS History File Data Set panel is available as option 4 on the History File Maintenance Menu. Refer to History-File-Allocate-and-Format for information on this panel.
- Copy the backup data set to the new History File data sets using IEBGENER or an equivalent utility.
Run a History File recovery to clear any existing error conditions. Recover from History File error conditions is option 3 on the History File Maintenance Menu.The Confirm History Recovery panel is displayed after selecting option 3 from the History File Maintenance Menu. Use the History File recovery process to re-create the DELTA PLUS Log and retain all records.
The History File recovery process requires permission to proceed. Observe the caution displayed on the panel and then select the appropriate option to continue or not.
Execute a new DELTA List, or execute an IMS operator command directly from DELTA PLUS (option 2 from the DELTA PLUS Main Menu), to verify that History File logging is functioning correctly.
Confirm History Recovery Panel
Menu Options Help
.-----------------------------------------------------------------------------.
| Confirm History File Recovery |
| Command ===> ______________________________________________________________ |
| |
| Do you wish to rebuild the History File data sets for Group GRPA? |
| Choose one selection. |
| _ 1. Yes, rebuild the History File data sets |
| 2. No, cancel the History File recovery |
| |
| History File Data Sets. |
| Primary : 'IMI.DLP.GRPA.HIST1' |
| Secondary: 'IMI.DLP.GRPA.HIST2' |
| |
| Note: History File Recovery processing will temporarily destroy |
| both DELTA PLUS History File data sets. During this period, |
| any DELTA PLUS request will be rejected until the recover |
| process has completed. |
| |
| Ensure that you have a current backup of the History File |
| data sets before continuing. |
| |
| F1=Help F12=Cancel |
'-----------------------------------------------------------------------------'Fields Available on the Confirm History Recovery Panel
Field Name
Description
selection field
Enter the appropriate option to indicate whether you want to rebuild the History File or cancel the History File recovery.
Primary
The data set name of the primary History File data set obtained from the IMSID basic options module (DLP#imsid) or from the group options module (DLPZ# grpid) for the target in question.
Secondary
The data set name of the secondary History File data set obtained from the IMSID basic options module (DLP#imsid) or from the group options module (DLPZ# grpid) for the target in question.