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Status Not under consideration
Workspace IBM i
Categories BRMS
Created by Guest
Created on Nov 21, 2019

BRMS IFS restore performance (*LINK)

Restoring an IFS file from a tape backup could take hours (or days) when there are many entries in *LINK.
BRMS should specify automatically the POSITION parameter, when the position itself is available in QA1ALI2 file (LIPOSMF1 field).


Use Case:

WRKMEDIBRM VOL(yyyyyy) // specify a volume created with a CTLGRP *LINK option "Retain object detail" *YES
Option 9 on *LINK
Option 9 on a folder that contains at least one file
Option 9 on the single row displayed
Option 7 on a file (or more)
Option 7 on each file
Press F9 to show all options
SEQNBR is pre-filled with IFS file sequence number, but POSITION is always *FIRST.
Doing so, the restore operation takes forever (never been able to see it finish).
Manually setting POSITION with the lowest LIPOSMF1 value (found in QA1ALI2), restore completes in just minutes.


Idea priority Low
  • Guest
    Feb 28, 2020

    The BRMS team does not intend to provide a solution to this request at this time, so it is being closed. There is a work-around which has been provided.


    In the original problem added the following steps to the end of the work-around provided above.

    Press F9 to show all options
    SEQNBR is pre-filled with IFS file sequence number, but POSITION is always *FIRST.

    When F9 is pressed, the native restore command is prompted. After this happens, BRMS does not get control back. Since the restore command that is prompted allows a customer to change the OBJ() parameter, BRMS is no longer able to know the correct POSITION() parameter in the event that the OBJ() parameter is changed. The native restore support expects an exact POSITION() parameter match to the OBJ() parameter and will fail the restore when it doesn't find the correct match. BRMS defaults the to use POSITION(*FIRST) when the command is prompted because is it the safest way to execute a restore command which will work for all prompted cases.

  • Guest
    Jan 21, 2020

    The BRMS team needs more information to further assess your Request for Enhancement. BRMS should use the POSITION parameter for *LINK restores that retain object level detail, but it appears this scenario has uncovered an issue with your specific restore path. We think there is a circumvention possible while waiting for this to be fixed.

    Please try the following scenario and let us know if it works:
    WRKMEDIBRM VOL(yyyyyy) // specify a volume created with a CTLGRP *LINK option "Retain object detail" *YES
    Option 9 on *LINK
    Option 9 on a folder that contains at least one file
    Option 9 on the single row displayed
    Option 7 on a file (or more)
    This should bring up the individual recovery items for each file that was selected with option 1 next to each item.
    Press to do the restores.

    Exit out of WRKMEDIBRM interface when the restores complete and use F10 to view details messages to check for successful restores.

  • Guest
    Nov 25, 2019

    Always assumed that with the information of the position available in the BRMS database, it was used.

    Thanks for bringing this forward.

    One could discuss if this is a bug or an enhancement. Why store information in the database and not use it?