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Status Not under consideration
Workspace AIX
Created by Guest
Created on Aug 30, 2016

RELATED IDEAS

?kdb' on AIX instances to extract data from device driver directly - Request for replacement command

Background:

Our support teams often run ‘kdb' commands on AIX operating system instances to extract data regarding certain device driver instances directly from the kernel.

Problem statement:

Use of kdb on production UNIX systems is frowned upon by some auditors/risk managers.

There have been (rare) instances where the use of kdb on production systems has interrupted processing, causing business impact.

There have been (again, rare) instances of operating system bugs (race conditions) where repeated collection of data has caused impact.


Requirements:

Enhancement to the AIX operating system such that the above data can be obtained safely, in a defined structured format and without resorting to use of kdb.

Display of current active device attributes

Display of current active device attributes where they differ from the attributes in the AIX ODM

Display of data related to virtual devices (for example virtual SCSI, virtual fiber-channel mapping)

Idea priority High
  • Guest
    Reply
    |     May 22, 2019

    IBM has evaluated the priority of this enhancement proposal relative to other future product content and determined that this RFE will not be pursued for a future product release

  • Guest
    Reply
    |     Sep 1, 2016

    some comments from development :

    1. lsattr -El shows current attribute values in ODM; lsattr -Pl shows the attribute values prior to any changes made by chdev -P that have not been picked up by a reboot or rmdev/mkdev. Comparing the output of the two should provide what is being looked for in the first two statements.

    2. Both the vscsi driver and the scsidisk driver support live dump. One should be able to collect a live dump on their system using the livedumpstart command and then run kdb against the file generated by the live dump. One can run kdb against the file on a separate machine if really concerned about kdb. That should allow one to do the cvai command (for vscsi) and the scsidisk command for hdisk4. Having said that, I don't know how much live dump is used so there is the possibility that not every possible bit of useful memory is included in the live dump file. If that is the case, I'd consider it a defect and we can get missing memory regions added to the file.

    The only hole is the vfcs command, which is associated with the NPIV client driver. It appears to me that the NPIV client driver does not support live dump. So live dump support would be required to be added to the NPIV client driver to satisfy all their requests using live dump.

  • Guest
    Reply
    |     Aug 31, 2016

    Creating a new RFE based on Community RFE #93784 in product IBM AIX.

  • Guest
    Reply
    |     Aug 31, 2016

    This RFE's Headline was changed after submission to reflect the headline of an internal request we were already considering, but will now track here.

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