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Status Future consideration
Workspace IBM i
Created by Guest
Created on Dec 2, 2021

Add capability to see who is using a NFS mount

I have a sandbox lpar (GDI) exporting a directory for testing this issue.
EXPORTFS OPTIONS('-I -O') DIR('/tmp')
strNFSSVR SERVER(*ALL)

I have another lpar mounting over this
md '/gdi'
md '/gdi/tmp'
MOUNT TYPE(*NFS) MFS('gdi:/tmp') MNTOVRDIR('/gdi/tmp')
OPTIONS('rw,suid,retry=5,rsize=32768,wsize=32768,timeo=20,retrans=5,
acregmin=30,acregmax=60,acdirmin=30,acdirmax=60,soft,async,
sec=sys,vers=3:2,nocache')
Then I use it with:
edtf '/gdi/tmp/test.txt'

From another session I am trying to see if I can tell who is using that mount.

The following returns nothing:
SELECT * FROM TABLE(QSYS2.IFS_OBJECT_LOCK_INFO(PATH_NAME => '/gdi/tmp'));

The following returns data, but I may not know the exact file they are working on:
SELECT * FROM TABLE(QSYS2.IFS_OBJECT_LOCK_INFO(PATH_NAME => '/gdi/tmp/test.txt'));

This doesn't return a hit:
SELECT * FROM QSYS2.NETSTAT_INFO
WHERE REMOTE_ADDRESS = '10.10.6.144';
unless I start some other communication to that lpar.

The old Navigator (http://gdisys:2001) has this:
https://www.ibm.com/docs/en/i/7.4?topic=i-working-dynamically-mounted-file-systems
But the new Navigator (http://gdisys:2002/Navigator) does not so I'm guessing there's currently no sql service for this information.
The information from the old Navigator does list the mount but does not say whether or not it is in use or by whom.


Use Case:

The problem is that if I go to unmount that, it generates "CPFA09E Object in use". I'm trying to figure out who is using it.


Idea priority Medium
  • Guest
    Dec 16, 2021

    The CEAC has reviewed this requirement and recommends that IBM view this as a MEDIUM priority requirement that should be addressed.

    Background: The COMMON Europe Advisory Council (CEAC) members have a broad range of experience in working with small and medium-sized IBM i customers. CEAC has a crucial role in working with IBM i development to help assess the value and impact of individual RFEs on the broader IBM i community and has therefore reviewed your RFE.

    To find out how CEAC help to shape the future of IBM i, see CEAC @ ibm.biz/BdYSYj and the article "The Five Hottest IBM i RFEs Of The Quarter" at ibm.biz/BdYSZT

    Therese Eaton – CEAC Program Manager, IBM

  • Guest
    Dec 10, 2021

    Thank you for submitting this request.
    We understand that it would be very helpful to determine if objects in an NFS-mounted file system are being used and, if possible, to know what job has/have the object(s) in use. It must be noted, however, that we cannot always find a job that is using a file system object. This is true for any file system.
    We don't have a way, currently, to determine if objects within an NFS mount are being used, and will consider it for future work.