[gpfsug-discuss] How to: Show clients actively connected to a given NFS export (CES)

Thu Mar 23 13:30:27 GMT 2023

I had basically /just/ started calling it Spectrum Scale. 😝 So I guess I’m at least partially responsible for the name change.

Sent from my iPhone

On Mar 23, 2023, at 09:25, Kidger, Daniel <daniel.kidger at hpe.com> wrote:

It is simple really….

The product is called “Storage Scale”.

It used to be called “Spectrum Scale” but that being abbreviated to “SS” was a problem, hence the recent change. :-)
As an appliance it is called ESS = “Elastic Storage System” since before being called Spectrum Scale, it was briefly called “Elastic Storage”
All the software RPMs though still start with “gpfs” and that is what every techie person still calls the software.
The software unpacks to /usr/lpp/mmfs/bin since the product was once the “MultiMedia FileSystem”
The ‘lpp’ comes from AIX. It stands for “Licensed Programming Product “. This term is lost on everyone who comes from a Linux background.
Likewise no one from the Linux world know what ‘adm’ is, as in /var/adm/ras  (or ras?)

There are c. 333 ‘mm’ commands like say ‘mmdeldisk’. None are actual binaries – all are Korn shell scripts (Korn was a shell language that Bash eventually replaced)
*(actually a few mm commands are written in Python not Korn.)
Most mm command call underlying binaries which all start with ‘ts’  eg ‘tsdeldisk’. This is, as we all know is become the product was known as TigerShark but no one could be bothered renaming stuff when “TigerShark” as a name was dropped 25 years ago.

Simple?

Daniel Kidger
HPC Storage Solutions Architect, EMEA
daniel.kidger at hpe.com<mailto:daniel.kidger at hpe.com>

+44 (0)7818 522266

hpe.com<http://www.hpe.com/>

<image001.png>

From: gpfsug-discuss <gpfsug-discuss-bounces at gpfsug.org> On Behalf Of Lyle Gayne
Sent: 23 March 2023 12:29
To: gpfsug main discussion list <gpfsug-discuss at gpfsug.org>
Subject: Re: [gpfsug-discuss] How to: Show clients actively connected to a given NFS export (CES)

Yes, MMFS was the internal name for an offering that I believe was to be called VideoCharger/MediaStreamer, and was an ahead of its time/market offering.  When MMFS was cancelled, all four of its developers of the time joined the GPFS effort, and we had collaborated with them to sequence changes in the same code base for a few years by that point and knew them all well.
________________________________
From: gpfsug-discuss <gpfsug-discuss-bounces at gpfsug.org<mailto:gpfsug-discuss-bounces at gpfsug.org>> on behalf of Ryan Novosielski <novosirj at rutgers.edu<mailto:novosirj at rutgers.edu>>
Sent: Wednesday, March 22, 2023 8:12 PM
To: gpfsug main discussion list <gpfsug-discuss at gpfsug.org<mailto:gpfsug-discuss at gpfsug.org>>
Subject: [EXTERNAL] Re: [gpfsug-discuss] How to: Show clients actively connected to a given NFS export (CES)

The product formerly known as MMFS? -- #BlackLivesMatter ____ || \\UTGERS<file://UTGERS>, |---------------------------*O*--------------------------- ||_// the State | Ryan Novosielski - novosirj@ rutgers. edu || \\ University | Sr. Technologist - 973/972. 0922
The product formerly known as MMFS?

--
#BlackLivesMatter
____
|| \\UTGERS<file://UTGERS>,    |---------------------------*O*---------------------------
||_// the State  |         Ryan Novosielski - novosirj at rutgers.edu<mailto:novosirj at rutgers.edu>
|| \\ University | Sr. Technologist - 973/972.0922 (2x0922) ~*~ RBHS Campus
||  \\    of NJ  | Office of Advanced Research Computing - MSB A555B, Newark
     `'

On Mar 22, 2023, at 17:30, Alec <anacreo at gmail.com<mailto:anacreo at gmail.com>> wrote:

Thanks for correction.. been using GPFS so long I forgot my basic NFS command.

Or that its now IBM Storage Scale and no longer Spectrum Scale or GPFS...

As a note that info is a little unreliable, but if you take a daily snapshots and throw it all together it should give you something.

Alternatively you can have most nfsd daemons log mounts and then scan the logs for a more reliable method.

Alec

On Wed, Mar 22, 2023, 2:00 PM Markus Stoeber <M.Stoeber at rz.uni-frankfurt.de<mailto:M.Stoeber at rz.uni-frankfurt.de>> wrote:
Am 22.03.2023 um 21:45 schrieb Beckman, Daniel D:

Hi,

showmount -a should do the trick, however the manpage notes that:

-a or --all
              List both the client hostname or IP address and mounted directory in host:dir format. This info should not be considered reliable. See the notes on rmtab in rpc.mountd(8).

showmount -d could also be an option:

-d or --directories
              List only the directories mounted by some client.

Best regards,

Markus

Thanks, but that shows the export list: a list of shares and the hosts / networks that have access. It does not show which of those clients are currently connected to a given share, as in have it mounted.

From: gpfsug-discuss <gpfsug-discuss-bounces at gpfsug.org><mailto:gpfsug-discuss-bounces at gpfsug.org> On Behalf Of Alec
Sent: Wednesday, March 22, 2023 4:23 PM
To: gpfsug main discussion list <gpfsug-discuss at gpfsug.org><mailto:gpfsug-discuss at gpfsug.org>
Subject: Re: [gpfsug-discuss] How to: Show clients actively connected to a given NFS export (CES)

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showmount -e nfsserver

Normal way to see that for an nfs server.

On Wed, Mar 22, 2023, 1:13 PM Beckman, Daniel D <dbec at loc.gov<mailto:dbec at loc.gov>> wrote:

This is probably a dumb question, but I could not find it in the documentation. We have certain NFS exports that we suspect are no longer used or needed but before removing we’d like to first check if any clients are currently mounting them.  (Not just what has access to those exports.) Are there commands that will show this?

Thanks,

Daniel

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--

Markus Stoeber

Systemmanagement AIX, Linux / Storagemanagement / Plattformintegration

Hochschulrechenzentrum der Johann Wolfgang Goethe-Universitaet

Abt. Basisdienste
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