lmod-users — A list to discuss using/deploying Lmod

[Lmod-users] source_sh and LD_LIBRARY_PATH

[Jakob S. <jak...@fa...>]

Dear Lmod users and developers,

using the source_sh function or the sh_to_modulefile script to update an 
environment based on a script that is meant to be sourced behaves as 
expected except for LD_LIBRARY_PATH variable. When the script appends or 
prepends to this variable, the source_sh function always treats this 
variable as empty and therefore ends up in a 'setenv' instead of a 
'append_path' or 'prepend_path'.

Regardless of it being a bad idea to have modules set LD_LIBRARY_PATH, 
my expectation is that it is treated as any other environment variable, 
which it clearly is not.

The only place that I could identify where behavior might be modified is 
in 'sh_to_modulefile', where LD_LIBRARY_PATH is in the the keepT table 
with a 'keep' value. But my understanding is that source_sh is not using 
sh_to_modulefile.

Is this intentional behavior, and if so, is there a way to overwrite it 
such that it is treated as a normal variable?

I am running Lmod v8.7.60

I appreciate any hint!

Kind regards,
Jakob

Re: [Lmod-users] Sorting of grouped avail

[Robert M. <mc...@ta...>]

I have moved the discussion  of this issue to Lmod's github site: https://github.com/TACC/Lmod/issues/763
[https://opengraph.githubassets.com/1d4f095a8eefc8602bb563d4dc6ac00dadaaad72cea89d425b1472a304e7a94d/TACC/Lmod/issues/763]<https://github.com/TACC/Lmod/issues/763>
Empty msgHook fails with spider and msgHook is not active for overview · Issue #763 · TACC/Lmod<https://github.com/TACC/Lmod/issues/763>
A user reported these bugs on the Lmod mailing list. I have moved it here for tracking.
github.com
I was able to reproduce your issue and fix it for me.  Please see the discussion described above.

Best,
Robert

Re: [Lmod-users] Sorting of grouped avail

[Marcus W. <wa...@it...>]

Once again,


we have two issues with the msgHook. We are using Lmod 8.7.47.


first:

As soon as an even empty function doing nothing is registered as a 
msgHook, module spider does not work anymore:

$> ml spider
/usr/bin/lua: /opt/lmod/8.7.47/libexec/cmdfuncs.lua:1068: bad argument 
#1 to 'concatTbl' (table expected, got nil)
stack traceback:
         [C]: in function 'table.concat'
         /opt/lmod/8.7.47/libexec/cmdfuncs.lua:1068: in function 'SpiderCmd'
         /opt/lmod/8.7.47/libexec/lmod:517: in function 'main'
         /opt/lmod/8.7.47/libexec/lmod:588: in main chunk
         [C]: in ?


is that a known bug?



second:
the msgHook seems to not influence the output of
module overview


Is that intended or just missing?


Best
Marcus



Am 05.05.2025 um 14:52 schrieb Marcus Wagner:
>
> Dear Lmod Team,
>
>
> sorry for the double post, just saw that I did not answer to the list. 
> I also wanted to add something, thus:
>
> It seems, that
>
> ml ov
>
> does not use the msgHook
>
>
> Is that intended?
>
>
> btw.:
>
> $> module --version
>
> Modules based on Lua: Version 8.7.47 2024-07-22 10:04 -04:00
>     by Robert McLay mc...@ta...
>
> It seems, that if the msgHook is registered, module spider does not 
> work anymore. Is that a known bug?
>
>
> $> ml spider
> /usr/bin/lua: /opt/lmod/8.7.47/libexec/cmdfuncs.lua:1068: bad argument 
> #1 to 'concatTbl' (table expected, got nil)
> stack traceback:
>         [C]: in function 'table.concat'
>         /opt/lmod/8.7.47/libexec/cmdfuncs.lua:1068: in function 
> 'SpiderCmd'
>         /opt/lmod/8.7.47/libexec/lmod:517: in function 'main'
>         /opt/lmod/8.7.47/libexec/lmod:588: in main chunk
>         [C]: in ?
>
>
> it suffices to create an empty function an register that for the msgHook
>
>
> Best
> Marcus
>
>
> Am 03.05.2025 um 01:23 schrieb Robert McLay:
>> As you have pointed out, you can change the order of avail output by 
>> ordering the directories in MODULEPATH.  However changing the order 
>> of the directories in MODULEPATH also affects which modules are 
>> loaded when there are duplicates. By using append_path instead of 
>> prepend_path will change the order but it is probably not what want.
>>
>> Lmod does provide a hook called "msgHook" which gives you the name 
>> "avail", "spider" or "list".  You could write your own hook to 
>> intercept the output of avail and re-order the output in whatever 
>> order you like.
>>
>> Best,
>> Lmod Team
>>
>>
>>
>>
> -- 
> Dipl.-Inf. Marcus Wagner
> stellv. Gruppenleitung
>
> IT Center
> Gruppe: Server, Storage, HPC
> Abteilung: Systeme und Betrieb
> RWTH Aachen University
> Seffenter Weg 23
> 52074 Aachen
> Tel: +49 241 80 24383
> wa...@it...
> www.itc.rwth-aachen.de
>
> Social-Media-Kanäle des IT Centers:
> https://blog.rwth-aachen.de/itc/ 
> https://www.facebook.com/itcenterrwth 
> https://www.instagram.com/itcenterrwthaachen/
> https://www.linkedin.com/company/itcenterrwth
> https://www.youtube.com/c/ITCenterRWTHAachen

-- 
Dipl.-Inf. Marcus Wagner
stellv. Gruppenleitung

IT Center
Gruppe: Server, Storage, HPC
Abteilung: Systeme und Betrieb
RWTH Aachen University
Seffenter Weg 23
52074 Aachen
Tel: +49 241 80 24383
wa...@it...
www.itc.rwth-aachen.de

Social-Media-Kanäle des IT Centers:
https://blog.rwth-aachen.de/itc/ 
https://www.facebook.com/itcenterrwth 
https://www.instagram.com/itcenterrwthaachen/
https://www.linkedin.com/company/itcenterrwth
https://www.youtube.com/c/ITCenterRWTHAachen

Re: [Lmod-users] Modules with Multiple Dependencies

[Damon M. <ma...@dm...>]

Hi Matthew,

Ok, if I'm understanding this correctly, the term 'dependency' has two meanings to Lmod:

1. the first meaning is entirely determined by where module files exist in the filesystem hierachy, and this dictates the behaviour of `module swap`; and
2. the second meaning is expressed by the "depends_on" Lmod function, and has nothing to do with `module swap`, it just tells Lmod to load the arguments passed to "depends_on" when `this` module is loaded.

Is my understanding correct?

Best wishes,
Damon

On Mon, 5 May 2025, at 11:51, Matthew Cawood wrote:
> Hi Paul,
> You're correct in pointing out that Lmod does support depends_on("A") 
> or ("A", "B") in modulefiles, but it's important to distinguish what 
> this means in the context of Lmod's hierarchy versus load-time 
> behavior. The statement: depends_on("A", "B") in a modulefile means: if 
> either A or B is not currently loaded, Lmod will attempt to load them 
> *automatically* when the current module is loaded.
> However, this has nothing to do with module visibility or hierarchical 
> layout. The module still lives under a single parent in the hierarchy 
> (e.g., under A), so it only becomes visible *after* A is loaded. If B 
> is not part of the hierarchy (i.e., not a parent that reveals child 
> paths), it still must be loadable by name for depends_on() to succeed, 
> but it doesn't influence where the module appears in the module tree.
> Also worth noting: Lmod tracks modules loaded via depends_on() using 
> reference counting. So if A was not previously loaded and gets loaded 
> as a dependency of X, it will be unloaded when X is unloaded—*unless* 
> something else also depends on A or the user had explicitly loaded A 
> beforehand (i.e, its reference counter != 0).
> In short:
>  • depends_on() ensures that A and B are loaded when needed.
>  • But it doesn’t allow the module to appear in two places in the 
> hierarchy, nor does it change how visibility is governed by MODULEPATH.
>  • `depends_on()` influences what gets loaded, not where things appear.
> Best, 
> Matthew
> 
> *From: *Damon McDougall <ma...@dm...>
> *Date: *Friday, May 2, 2025 at 18:40
> *To: *Matthew Cawood <mc...@ta...>, Paul Bauman <ptb...@gm...>
> *Cc: *lmod-users <lmo...@li...>
> *Subject: *Re: [Lmod-users] Modules with Multiple Dependencies
> Hi Matthew,
>
>> What you're describing—having module C depend on both A and B—isn't supported directly in Lmod due to its hierarchical design
>
> In the Lmod 
> documentation<https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flmod.readthedocs.io%2Fen%2Flatest%2F098_dependent_modules.html%23dependent-modules&data=05%7C02%7C%7C4a8cd53933e6441d149208dd89d2c465%7C31d7e2a5bdd8414e9e97bea998ebdfe1%7C0%7C0%7C638818260562923085%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C40000%7C%7C%7C&sdata=kMd3W9X9u7Q8nutshBUk6PKlYtPctF7qOac9lA8FlFQ%3D&reserved=0 
> <https://lmod.readthedocs.io/en/latest/098_dependent_modules.html#dependent-modules>> 
> I see this statement:
>
> depends_on("A", "B")
>
> What does this statement mean if Lmod doesn't support a module 
> depending on both "A" and "B"?
>
> On Thu, 1 May 2025, at 12:56, Matthew Cawood wrote:
>> Hi Paul,
>> What you're describing—having module C depend on both A and B—isn't 
>> supported directly in Lmod due to its hierarchical design. Modules can 
>> only have a single parent in the hierarchy, meaning a module like C 
>> must reside under either A *or* B, but not both. This design simplifies 
>> environment resolution and prevents ambiguity, but it does limit 
>> support for multi-parent dependencies.
>> At TACC, we’ve run into a similar challenge on our Vista system, which 
>> includes both CPU and Grace Hopper GPU nodes. Our hierarchy puts the 
>> compiler at the top level, with MPI and CUDA as sibling layers. We 
>> treat CUDA-aware MPI as a child of the CUDA module. So if a user loads 
>> a compiler and MPI, then loads CUDA, the MPI is automatically swapped 
>> for a CUDA-aware version. This keeps the environment consistent while 
>> preserving the one-parent rule.
>> In your case, to support swapping A1 → A2 and have C and D reload 
>> accordingly, you'd need to enforce strict naming/version consistency 
>> and rely on Lmod’s automatic reloading of matching module names after a 
>> swap. But true dependency tracking across multiple roots isn’t possible 
>> with standard Lmod hierarchy.
>> Hope this helps—happy to elaborate further if useful.
>> Best,
>> Matthew
>> 
>> *From: *Paul T. Bauman <ptb...@gm...>
>> *Date: *Thursday, April 24, 2025 at 10:50
>> *To: *lmod-users <lmo...@li...>
>> *Cc: *Damon McDougall <dam...@gm...>
>> *Subject: *[Lmod-users] Modules with Multiple Dependencies
>> Greetings Lmod Users,
>> 
>> I'd talked with Robert about something related over a decade ago now 
>> (sigh), but wanted to see if things have changed since then. Here is 
>> the kind of scenario I'm interested in at an abstract level.
>> 
>> Consider modules A1, A2, B1, B2, C, and D. A and B have different 
>> versions, but are the same package and do not depend on each other. 
>> Module C depends on both A and B. Module D depends on C (and therefore 
>> implicitly A and B).
>> 
>> A,B --> C --> D
>> 
>> I would like to be able to "module swap A1 A2" or "module swap B1 B2" 
>> and have C and D be reloaded accordingly.
>> 
>> Is this possible?
>> 
>> The specific use-case I have in mind is that my MPI stack depends on 
>> both the compiler and the GPU compute stack (i.e. different CUDA or 
>> ROCm versions). I would like to be able to swap out the compiler 
>> version and/or the GPU software stack version and then have dependent 
>> modules reloaded accordingly. I would be curious to hear about others' 
>> solution to this specific pattern as I'm sure I'm not the first to have 
>> thought about this at this point.
>> 
>> Thanks for your time.
>> 
>> Best,
>> 
>> Paul

[Lmod-users] Tomorrow: Lmod Zoom Mtg: May 6th at 9:30 US Central (14:30 UTC)

[Robert M. <mc...@ta...>]

We will hold the Lmod Zoom meeting tomorrow April 8th at 9:30 US Central Time, (14:30 UTC).

The zoom link is:

https://utexas.zoom.us/j/2714596735

Beginners welcome.  You do not need to be an Lmod expert to attend the meeting.  New topics welcome.

The current agenda is:


  *
Q/A
  *
Release of Lmod 8.7.60
  *
Debian releasing Lmod 8.7.60 package
  *
Progress on: generating spider cache files that contain the contents of each module file
  *
Is this going to improve performance on parallel file systems?
  *
LMOD_DYNAMIC_SPIDER_CACHE changes coming in 8.8
  *
TCL 9 support now in Lmod 8.7.60

Best,
Lmod Team

Re: [Lmod-users] Modules with Multiple Dependencies

[Matthew C. <mc...@ta...>]

Hi Paul,
You're correct in pointing out that Lmod does support depends_on("A") or ("A", "B") in modulefiles, but it's important to distinguish what this means in the context of Lmod's hierarchy versus load-time behavior. The statement: depends_on("A", "B") in a modulefile means: if either A or B is not currently loaded, Lmod will attempt to load them automatically when the current module is loaded.
However, this has nothing to do with module visibility or hierarchical layout. The module still lives under a single parent in the hierarchy (e.g., under A), so it only becomes visible after A is loaded. If B is not part of the hierarchy (i.e., not a parent that reveals child paths), it still must be loadable by name for depends_on() to succeed, but it doesn't influence where the module appears in the module tree.
Also worth noting: Lmod tracks modules loaded via depends_on() using reference counting. So if A was not previously loaded and gets loaded as a dependency of X, it will be unloaded when X is unloaded—unless something else also depends on A or the user had explicitly loaded A beforehand (i.e, its reference counter != 0).
In short:

  *   depends_on() ensures that A and B are loaded when needed.
  *   But it doesn’t allow the module to appear in two places in the hierarchy, nor does it change how visibility is governed by MODULEPATH.
  *   depends_on() influences what gets loaded, not where things appear.
Best,
Matthew

From: Damon McDougall <ma...@dm...>
Date: Friday, May 2, 2025 at 18:40
To: Matthew Cawood <mc...@ta...>, Paul Bauman <ptb...@gm...>
Cc: lmod-users <lmo...@li...>
Subject: Re: [Lmod-users] Modules with Multiple Dependencies
Hi Matthew,

> What you're describing—having module C depend on both A and B—isn't supported directly in Lmod due to its hierarchical design

In the Lmod documentation<https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flmod.readthedocs.io%2Fen%2Flatest%2F098_dependent_modules.html%23dependent-modules&data=05%7C02%7C%7C4a8cd53933e6441d149208dd89d2c465%7C31d7e2a5bdd8414e9e97bea998ebdfe1%7C0%7C0%7C638818260562923085%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C40000%7C%7C%7C&sdata=kMd3W9X9u7Q8nutshBUk6PKlYtPctF7qOac9lA8FlFQ%3D&reserved=0<https://lmod.readthedocs.io/en/latest/098_dependent_modules.html#dependent-modules>> I see this statement:

depends_on("A", "B")

What does this statement mean if Lmod doesn't support a module depending on both "A" and "B"?

On Thu, 1 May 2025, at 12:56, Matthew Cawood wrote:
> Hi Paul,
> What you're describing—having module C depend on both A and B—isn't
> supported directly in Lmod due to its hierarchical design. Modules can
> only have a single parent in the hierarchy, meaning a module like C
> must reside under either A *or* B, but not both. This design simplifies
> environment resolution and prevents ambiguity, but it does limit
> support for multi-parent dependencies.
> At TACC, we’ve run into a similar challenge on our Vista system, which
> includes both CPU and Grace Hopper GPU nodes. Our hierarchy puts the
> compiler at the top level, with MPI and CUDA as sibling layers. We
> treat CUDA-aware MPI as a child of the CUDA module. So if a user loads
> a compiler and MPI, then loads CUDA, the MPI is automatically swapped
> for a CUDA-aware version. This keeps the environment consistent while
> preserving the one-parent rule.
> In your case, to support swapping A1 → A2 and have C and D reload
> accordingly, you'd need to enforce strict naming/version consistency
> and rely on Lmod’s automatic reloading of matching module names after a
> swap. But true dependency tracking across multiple roots isn’t possible
> with standard Lmod hierarchy.
> Hope this helps—happy to elaborate further if useful.
> Best,
> Matthew
>
> *From: *Paul T. Bauman <ptb...@gm...>
> *Date: *Thursday, April 24, 2025 at 10:50
> *To: *lmod-users <lmo...@li...>
> *Cc: *Damon McDougall <dam...@gm...>
> *Subject: *[Lmod-users] Modules with Multiple Dependencies
> Greetings Lmod Users,
>
> I'd talked with Robert about something related over a decade ago now
> (sigh), but wanted to see if things have changed since then. Here is
> the kind of scenario I'm interested in at an abstract level.
>
> Consider modules A1, A2, B1, B2, C, and D. A and B have different
> versions, but are the same package and do not depend on each other.
> Module C depends on both A and B. Module D depends on C (and therefore
> implicitly A and B).
>
> A,B --> C --> D
>
> I would like to be able to "module swap A1 A2" or "module swap B1 B2"
> and have C and D be reloaded accordingly.
>
> Is this possible?
>
> The specific use-case I have in mind is that my MPI stack depends on
> both the compiler and the GPU compute stack (i.e. different CUDA or
> ROCm versions). I would like to be able to swap out the compiler
> version and/or the GPU software stack version and then have dependent
> modules reloaded accordingly. I would be curious to hear about others'
> solution to this specific pattern as I'm sure I'm not the first to have
> thought about this at this point.
>
> Thanks for your time.
>
> Best,
>
> Paul

Re: [Lmod-users] Sorting of grouped avail

[Marcus W. <wa...@it...>]

Dear Lmod Team,


sorry for the double post, just saw that I did not answer to the list. I 
also wanted to add something, thus:

It seems, that

ml ov

does not use the msgHook


Is that intended?


btw.:

$> module --version

Modules based on Lua: Version 8.7.47 2024-07-22 10:04 -04:00
     by Robert McLay mc...@ta...

It seems, that if the msgHook is registered, module spider does not work 
anymore. Is that a known bug?


$> ml spider
/usr/bin/lua: /opt/lmod/8.7.47/libexec/cmdfuncs.lua:1068: bad argument 
#1 to 'concatTbl' (table expected, got nil)
stack traceback:
         [C]: in function 'table.concat'
         /opt/lmod/8.7.47/libexec/cmdfuncs.lua:1068: in function 'SpiderCmd'
         /opt/lmod/8.7.47/libexec/lmod:517: in function 'main'
         /opt/lmod/8.7.47/libexec/lmod:588: in main chunk
         [C]: in ?


it suffices to create an empty function an register that for the msgHook


Best
Marcus


Am 03.05.2025 um 01:23 schrieb Robert McLay:
> As you have pointed out, you can change the order of avail output by 
> ordering the directories in MODULEPATH.  However changing the order of 
> the directories in MODULEPATH also affects which modules are loaded 
> when there are duplicates.  By using append_path instead of 
> prepend_path will change the order but it is probably not what want.
>
> Lmod does provide a hook called "msgHook" which gives you the name 
> "avail", "spider" or "list".  You could write your own hook to 
> intercept the output of avail and re-order the output in whatever 
> order you like.
>
> Best,
> Lmod Team
>
>
>
>
-- 
Dipl.-Inf. Marcus Wagner
stellv. Gruppenleitung

IT Center
Gruppe: Server, Storage, HPC
Abteilung: Systeme und Betrieb
RWTH Aachen University
Seffenter Weg 23
52074 Aachen
Tel: +49 241 80 24383
wa...@it...
www.itc.rwth-aachen.de

Social-Media-Kanäle des IT Centers:
https://blog.rwth-aachen.de/itc/ 
https://www.facebook.com/itcenterrwth 
https://www.instagram.com/itcenterrwthaachen/
https://www.linkedin.com/company/itcenterrwth
https://www.youtube.com/c/ITCenterRWTHAachen

Re: [Lmod-users] Sorting of grouped avail

[Marcus W. <wa...@it...>]

Hi Lmod Team,


thanks, i wasn't aware of the msgHook. For anyone being interested, here 
is my code:

--- hook for sorting module avail
local function msg_hook(kind, a)
    if (kind == "avail") then
       local mtype = "ga"
       local b = {}
       local sort = { "ga", "core", "pcore", "comp", "pcomp", "mpi", 
"pmpi", "cont", "rest" }
       for _,k in ipairs (sort) do
          b[k] = {}
       end
       --- put parts into new tables
       for k in pairs (a) do
          if a[k]:sub(1,4) == "----" then
             if a[k]:find("Your personal Core modules", 1, true ) ~= nil 
then
                mtype = "pcore"
             elseif a[k]:find("Your personal Compiler dependent 
modules", 1, true ) ~= nil then
                mtype = "pcomp"
             elseif a[k]:find("Your personal MPI dependent modules", 1, 
true ) ~= nil then
                mtype = "pmpi"
             elseif a[k]:find("Core Modules", 1, true ) ~= nil then
                mtype = "core"
             elseif a[k]:find("Compiler dependent Modules", 1, true ) ~= 
nil then
                mtype = "comp"
             elseif a[k]:find("MPI dependent Modules", 1, true ) ~= nil then
                mtype = "mpi"
             elseif a[k]:find("Container Image Modules", 1, true ) ~= 
nil then
                mtype = "cont"
             end
          elseif a[k]:find(" Where:", 1, true) ~= nil then
             mtype = "rest"
          end
          b[mtype][#b[mtype]+1] = a[k]
       end
       --- delete avail table
       for k in pairs (a) do
          a[k] = nil
       end
       --- fill table again with our sort order
       for _,k in ipairs (sort) do
          for v in pairs (b[k]) do
             a[#a+1] = b[k][v]
          end
       end
    end
end

hook.register("msgHook", msg_hook)


Best
Marcus



Am 03.05.2025 um 01:23 schrieb Robert McLay:
> As you have pointed out, you can change the order of avail output by 
> ordering the directories in MODULEPATH.  However changing the order of 
> the directories in MODULEPATH also affects which modules are loaded 
> when there are duplicates.  By using append_path instead of 
> prepend_path will change the order but it is probably not what want.
>
> Lmod does provide a hook called "msgHook" which gives you the name 
> "avail", "spider" or "list".  You could write your own hook to 
> intercept the output of avail and re-order the output in whatever 
> order you like.
>
> Best,
> Lmod Team
>
>
>
>
-- 
Dipl.-Inf. Marcus Wagner
stellv. Gruppenleitung

IT Center
Gruppe: Server, Storage, HPC
Abteilung: Systeme und Betrieb
RWTH Aachen University
Seffenter Weg 23
52074 Aachen
Tel: +49 241 80 24383
wa...@it...
www.itc.rwth-aachen.de

Social-Media-Kanäle des IT Centers:
https://blog.rwth-aachen.de/itc/ 
https://www.facebook.com/itcenterrwth 
https://www.instagram.com/itcenterrwthaachen/
https://www.linkedin.com/company/itcenterrwth
https://www.youtube.com/c/ITCenterRWTHAachen

Re: [Lmod-users] Modules with Multiple Dependencies

[Damon M. <ma...@dm...>]

Hi Matthew,

> What you're describing—having module C depend on both A and B—isn't supported directly in Lmod due to its hierarchical design

In the Lmod documentation<https://lmod.readthedocs.io/en/latest/098_dependent_modules.html#dependent-modules> I see this statement:

depends_on("A", "B")

What does this statement mean if Lmod doesn't support a module depending on both "A" and "B"?

On Thu, 1 May 2025, at 12:56, Matthew Cawood wrote:
> Hi Paul,
> What you're describing—having module C depend on both A and B—isn't 
> supported directly in Lmod due to its hierarchical design. Modules can 
> only have a single parent in the hierarchy, meaning a module like C 
> must reside under either A *or* B, but not both. This design simplifies 
> environment resolution and prevents ambiguity, but it does limit 
> support for multi-parent dependencies.
> At TACC, we’ve run into a similar challenge on our Vista system, which 
> includes both CPU and Grace Hopper GPU nodes. Our hierarchy puts the 
> compiler at the top level, with MPI and CUDA as sibling layers. We 
> treat CUDA-aware MPI as a child of the CUDA module. So if a user loads 
> a compiler and MPI, then loads CUDA, the MPI is automatically swapped 
> for a CUDA-aware version. This keeps the environment consistent while 
> preserving the one-parent rule.
> In your case, to support swapping A1 → A2 and have C and D reload 
> accordingly, you'd need to enforce strict naming/version consistency 
> and rely on Lmod’s automatic reloading of matching module names after a 
> swap. But true dependency tracking across multiple roots isn’t possible 
> with standard Lmod hierarchy.
> Hope this helps—happy to elaborate further if useful.
> Best,
> Matthew
> 
> *From: *Paul T. Bauman <ptb...@gm...>
> *Date: *Thursday, April 24, 2025 at 10:50
> *To: *lmod-users <lmo...@li...>
> *Cc: *Damon McDougall <dam...@gm...>
> *Subject: *[Lmod-users] Modules with Multiple Dependencies
> Greetings Lmod Users,
> 
> I'd talked with Robert about something related over a decade ago now 
> (sigh), but wanted to see if things have changed since then. Here is 
> the kind of scenario I'm interested in at an abstract level.
> 
> Consider modules A1, A2, B1, B2, C, and D. A and B have different 
> versions, but are the same package and do not depend on each other. 
> Module C depends on both A and B. Module D depends on C (and therefore 
> implicitly A and B).
> 
> A,B --> C --> D
> 
> I would like to be able to "module swap A1 A2" or "module swap B1 B2" 
> and have C and D be reloaded accordingly.
> 
> Is this possible?
> 
> The specific use-case I have in mind is that my MPI stack depends on 
> both the compiler and the GPU compute stack (i.e. different CUDA or 
> ROCm versions). I would like to be able to swap out the compiler 
> version and/or the GPU software stack version and then have dependent 
> modules reloaded accordingly. I would be curious to hear about others' 
> solution to this specific pattern as I'm sure I'm not the first to have 
> thought about this at this point.
> 
> Thanks for your time.
> 
> Best,
> 
> Paul

Re: [Lmod-users] Sorting of grouped avail

[Robert M. <mc...@ta...>]

As you have pointed out, you can change the order of avail output by ordering the directories in MODULEPATH.  However changing the order of the directories in MODULEPATH also affects which modules are loaded when there are duplicates.  By using append_path instead of prepend_path will change the order but it is probably not what want.

Lmod does provide a hook called "msgHook" which gives you the name "avail", "spider" or "list".  You could write your own hook to intercept the output of avail and re-order the output in whatever order you like.

Best,
Lmod Team

Re: [Lmod-users] Modules with Multiple Dependencies

[Matthew C. <mc...@ta...>]

Hi Paul,
What you're describing—having module C depend on both A and B—isn't supported directly in Lmod due to its hierarchical design. Modules can only have a single parent in the hierarchy, meaning a module like C must reside under either A or B, but not both. This design simplifies environment resolution and prevents ambiguity, but it does limit support for multi-parent dependencies.
At TACC, we’ve run into a similar challenge on our Vista system, which includes both CPU and Grace Hopper GPU nodes. Our hierarchy puts the compiler at the top level, with MPI and CUDA as sibling layers. We treat CUDA-aware MPI as a child of the CUDA module. So if a user loads a compiler and MPI, then loads CUDA, the MPI is automatically swapped for a CUDA-aware version. This keeps the environment consistent while preserving the one-parent rule.
In your case, to support swapping A1 → A2 and have C and D reload accordingly, you'd need to enforce strict naming/version consistency and rely on Lmod’s automatic reloading of matching module names after a swap. But true dependency tracking across multiple roots isn’t possible with standard Lmod hierarchy.
Hope this helps—happy to elaborate further if useful.
Best,
Matthew

From: Paul T. Bauman <ptb...@gm...>
Date: Thursday, April 24, 2025 at 10:50
To: lmod-users <lmo...@li...>
Cc: Damon McDougall <dam...@gm...>
Subject: [Lmod-users] Modules with Multiple Dependencies
Greetings Lmod Users,

I'd talked with Robert about something related over a decade ago now (sigh), but wanted to see if things have changed since then. Here is the kind of scenario I'm interested in at an abstract level.

Consider modules A1, A2, B1, B2, C, and D. A and B have different versions, but are the same package and do not depend on each other. Module C depends on both A and B. Module D depends on C (and therefore implicitly A and B).

A,B --> C --> D

I would like to be able to "module swap A1 A2" or "module swap B1 B2" and have C and D be reloaded accordingly.

Is this possible?

The specific use-case I have in mind is that my MPI stack depends on both the compiler and the GPU compute stack (i.e. different CUDA or ROCm versions). I would like to be able to swap out the compiler version and/or the GPU software stack version and then have dependent modules reloaded accordingly. I would be curious to hear about others' solution to this specific pattern as I'm sure I'm not the first to have thought about this at this point.

Thanks for your time.

Best,

Paul

[Lmod-users] Modules with Multiple Dependencies

[Paul T. B. <ptb...@gm...>]

Greetings Lmod Users,

I'd talked with Robert about something related over a decade ago now
(sigh), but wanted to see if things have changed since then. Here is the
kind of scenario I'm interested in at an abstract level.

Consider modules A1, A2, B1, B2, C, and D. A and B have different versions,
but are the same package and do not depend on each other. Module C depends
on both A and B. Module D depends on C (and therefore implicitly A and B).

A,B --> C --> D

I would like to be able to "module swap A1 A2" or "module swap B1 B2" and
have C and D be reloaded accordingly.

Is this possible?

The specific use-case I have in mind is that my MPI stack depends on both
the compiler and the GPU compute stack (i.e. different CUDA or ROCm
versions). I would like to be able to swap out the compiler version and/or
the GPU software stack version and then have dependent modules reloaded
accordingly. I would be curious to hear about others' solution to this
specific pattern as I'm sure I'm not the first to have thought about this
at this point.

Thanks for your time.

Best,

Paul

[Lmod-users] Sorting of grouped avail

[Marcus W. <wa...@it...>]

Hello all,

we are using a hierarchical module naming scheme. For us, it looks like 
the sorting of the groups depends on the order in the modulepath.
Is there a possibility, to influence the sorting?

how it looks now:

global aliases
MPI modules
Compiler modules
Core modules
personal Core modules

what we would like to achieve:

global aliases
Core modules
personal Core modules
Compiler modules
MPI modules


Does anyone have a hint?

Best
Marcus

-- 
Dipl.-Inf. Marcus Wagner
stellv. Gruppenleitung

IT Center
Gruppe: Server, Storage, HPC
Abteilung: Systeme und Betrieb
RWTH Aachen University
Seffenter Weg 23
52074 Aachen
Tel: +49 241 80 24383
wa...@it...
www.itc.rwth-aachen.de

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https://www.youtube.com/c/ITCenterRWTHAachen

[Lmod-users] Tomorrow: Lmod Zoom Meeting: April 8th at 9:30 US Central (14:30 UTC)

[Robert M. <mc...@ta...>]

We will hold the Lmod Zoom meeting tomorrow April 8th at 9:30 US Central Time, (14:30 UTC).

The zoom link is:

https://utexas.zoom.us/j/2714596735

Beginners welcome.  You do not need to be an Lmod expert to attend the meeting.  New topics welcome.

The current agenda is:


  *
Q/A
  *
A discussion about generating spider cache files that contain the contents of each module file
  *
TCL contents issues: Copying file to /dev/shmem,  Reporting Errors
  *
Regular Spider cache file vs. Big Spider Cache file
  *
Is this going to improve performance on parallel file systems?

Best,
Lmod Team

Re: [Lmod-users] after less command lua permission denied

[Robert M. <mc...@ta...>]

Typically, the less program is installed where LESSOPEN is defined.  This starts a new shell. When this shell is run, it sources the files in /etc/profile.d.  In your case it sources /etc/profile.d/lmod.sh.  And that executes /opt/ohpc/admin/lmod/lmod/libexec/addto.  At the top of addto has in your case:

#!/usr/bin/lua5.3
             -- -*- lua -*-

The command addto is expecting /usr/bin/lua5.3 to exist and be executable by you the user.  For some reason, the lua5.3 executable is not there in /usr/bin.

This is not an Lmod issue.  It might be an OHPC issue.

Best,
Robert

________________________________
From: Aziz Öğütlü <azi...@ed...>
Sent: Tuesday, April 1, 2025 10:01 PM
To: Lmod Users <lmo...@li...>
Subject: [Lmod-users] after less command lua permission denied

Hi there all lmod users,
I've installed lmod-ohpc package on SUSE 15.6 and when I run less
command with root user after close the command this error shows:

software:~ # less log
/opt/ohpc/admin/lmod/lmod/init/bash:
/opt/ohpc/admin/lmod/lmod/libexec/addto: /usr/bin/lua5.3: bad
interpreter: Permission denied

What can be the problem?

--
Best regards,
Aziz Öğütlü

Eduline Bilişim Sanayi ve Ticaret Ltd. Şti.  https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.eduline.com.tr%2F&data=05%7C02%7C%7Cc04678b164274048a08808dd719da4e7%7C31d7e2a5bdd8414e9e97bea998ebdfe1%7C0%7C0%7C638791644087705775%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=sERk4ILr8d39H%2FBxWUSm1YvR3n0DGfJG%2BGHCilo44v4%3D&reserved=0<http://www.eduline.com.tr/>
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Re: [Lmod-users] Some modules not list

[Robert M. <mc...@ta...>]

I am unable to reproduce this issue.  I can do a module avail when there is a module named starccm+.

Please create a github issue at github.com/TACC/Lmod.  Please run:

    $ module -D avail 2> avail.log

Then use a github gist to attach avail.log

Best
________________________________
From: Aziz Öğütlü <azi...@ed...>
Sent: Tuesday, April 1, 2025 9:56 PM
To: lmo...@li... <lmo...@li...>
Subject: [Lmod-users] Some modules not list

Hi there all lmod users,
I've installed lmod-ohpc package on SUSE 15.6 and some of the modules
are not listing on module avail command.
For example starcc+ module is not listing but I can load it with module
load command. module -D load starccm+ command output log is attached.
What can be the problem.

--
Best regards,
Aziz Öğütlü

Eduline Bilişim Sanayi ve Ticaret Ltd. Şti.  https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.eduline.com.tr%2F&data=05%7C02%7C%7C04834c3484de4abcf6ac08dd719fbce1%7C31d7e2a5bdd8414e9e97bea998ebdfe1%7C0%7C0%7C638791653086664091%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=AfgIfNUtEcfo0z%2FY107aGMWz1lb5ZBIsCIOz0cdRStM%3D&reserved=0<http://www.eduline.com.tr/>
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Re: [Lmod-users] Suse cannot load lmod.sh on profile.d

[Robert M. <mc...@ta...>]

There is a typo in the previous message:

Normally, the root user does NOT get the module command defined.  This is clear from the top of the init/profile.in file:

Best,
Robert

________________________________
From: Robert McLay <mc...@ta...>
Sent: Wednesday, April 2, 2025 1:47 PM
To: Lmod Users <lmo...@li...>; azi...@ed... <azi...@ed...>
Subject: Re: [Lmod-users] Suse cannot load lmod.sh on profile.d

Normally, the root user does get the module command defined.  This is clear from the top of the init/profile.in file:

#!/bin/sh
########################################################################
#  This is the system wide source file for setting up modules
########################################################################

if [ -z "${LMOD_ALLOW_ROOT_USE+x}" ]; then
  LMOD_ALLOW_ROOT_USE=@lmod_allow_root_use@
fi

( [ -n "${USER_IS_ROOT:-}" ] || ( [ "${LMOD_ALLOW_ROOT_USE:-}" != yes ] && [ $(id -u) = 0 ] ) ) && return

If you want to have the root user be able to run the module command then you need to

export LMOD_ALLOW_ROOT_USE=1

Before /etc/profile.d/lmod.sh is sourced

Best,
Robert
________________________________
From: Aziz Öğütlü <azi...@ed...>
Sent: Tuesday, April 1, 2025 9:58 PM
To: Lmod Users <lmo...@li...>
Subject: [Lmod-users] Suse cannot load lmod.sh on profile.d

Hi there all lmod users,
I've installed lmod-ohpc on SUSE 15.6 and for root user
/etc/profile.d/lmod.sh file cannot automatically load. Because of that
module command cannot run. What can be the problem?

--
Best regards,
Aziz Öğütlü

Eduline Bilişim Sanayi ve Ticaret Ltd. Şti.  https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.eduline.com.tr%2F&data=05%7C02%7C%7Cc729a784acc94db3e71808dd719cf571%7C31d7e2a5bdd8414e9e97bea998ebdfe1%7C0%7C0%7C638791641149831814%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=6ZZG4UlRR6%2F0hWe4oHKcQ9lq0kdv6zHUDOSkQjPOKkI%3D&reserved=0<http://www.eduline.com.tr/>
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>> matters at https://links.utexas.edu/rtyclf.                        <<

Re: [Lmod-users] Suse cannot load lmod.sh on profile.d

[Robert M. <mc...@ta...>]

Normally, the root user does get the module command defined.  This is clear from the top of the init/profile.in file:

#!/bin/sh
########################################################################
#  This is the system wide source file for setting up modules
########################################################################

if [ -z "${LMOD_ALLOW_ROOT_USE+x}" ]; then
  LMOD_ALLOW_ROOT_USE=@lmod_allow_root_use@
fi

( [ -n "${USER_IS_ROOT:-}" ] || ( [ "${LMOD_ALLOW_ROOT_USE:-}" != yes ] && [ $(id -u) = 0 ] ) ) && return

If you want to have the root user be able to run the module command then you need to

export LMOD_ALLOW_ROOT_USE=1

Before /etc/profile.d/lmod.sh is sourced

Best,
Robert
________________________________
From: Aziz Öğütlü <azi...@ed...>
Sent: Tuesday, April 1, 2025 9:58 PM
To: Lmod Users <lmo...@li...>
Subject: [Lmod-users] Suse cannot load lmod.sh on profile.d

Hi there all lmod users,
I've installed lmod-ohpc on SUSE 15.6 and for root user
/etc/profile.d/lmod.sh file cannot automatically load. Because of that
module command cannot run. What can be the problem?

--
Best regards,
Aziz Öğütlü

Eduline Bilişim Sanayi ve Ticaret Ltd. Şti.  https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.eduline.com.tr%2F&data=05%7C02%7C%7Cc729a784acc94db3e71808dd719cf571%7C31d7e2a5bdd8414e9e97bea998ebdfe1%7C0%7C0%7C638791641149831814%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=6ZZG4UlRR6%2F0hWe4oHKcQ9lq0kdv6zHUDOSkQjPOKkI%3D&reserved=0<http://www.eduline.com.tr/>
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>> matters at https://links.utexas.edu/rtyclf.                        <<

Re: [Lmod-users] FPATH

[Robert M. <mc...@ta...>]

The variable FPATH is used by Ksh to find shell functions.  Lmod sets FPATH to point to the ksh versions of the module and ml commands for ALL shells.  This means that any shell user can run a ksh script that has module commands.  As for addto, it is a lua script that modifies the path-like variables.

It doesn't mean that you have to support users that have ksh shell as their default shell.   At TACC, we support bash, tcsh and zsh as user shells only.

You can safely remove it if you so desire.  It is only there to support running ksh scripts.  The question is why?  Is there a problem with setting it?

Best,
Robert


Reply

Forward
WP


________________________________
From: Robert McLay <mc...@ta...>
Sent: Wednesday, April 2, 2025 1:17 PM
To: Ward Poelmans <wpo...@gm...>
Subject: Re: [Lmod-users] FPATH

The variable FPATH is used by Ksh to find shell functions.  Lmod sets FPATH to point to the ksh versions of the module and ml commands for ALL shells.  This means that any shell user can run a ksh script that has module commands.  As for addto, it is a lua script that modifies the path-like variables.

It doesn't mean that you have to support users that have ksh shell as their default shell.   At TACC, we support bash, tcsh and zsh as user shells only.

You can safely remove it if you so desire.  It is only there to support running ksh scripts.  The question is why?  Is there a problem with setting it?

Best,
Robert

________________________________
From: Ward Poelmans <wpo...@gm...>
Sent: Tuesday, April 1, 2025 1:16 PM
To: lmod-users <lmo...@li...>
Subject: Re: [Lmod-users] FPATH

Hi Robert,

So what does the FPATH variable do? Can we safely disable it?

And why is this addto command being run inside a script that doesn't call anything Lmod command?

Ward

On 1/04/2025 17:31, Robert McLay wrote:
Support for ksh is there so that bash/zsh users can run the module command in Ksh scripts.

Best,
Robert.

________________________________
From: Ward Poelmans <wpo...@gm...><mailto:wpo...@gm...>
Sent: Tuesday, April 1, 2025 9:25 AM
To: lmod-users <lmo...@li...><mailto:lmo...@li...>
Subject: [Lmod-users] FPATH

Hi Lmod people,

We've noticed that our task prolog in Slurm is executing the following command:
/usr/bin/lua /usr/share/lmod/lmod/libexec/addto --append FPATH /usr/share/lmod/lmod/init/ksh_funcs /usr/share/lmod/lmod/init/ksh_funcs

Can anyone tell what this is and why it runs? We don't use ksh, only bash. ksh is installed because GPFS needs it.

I see an `export FPATH=...` like in the `init/bash` of Lmod but I don't understand why it's there. There is also a LMOD_KSH_SUPPORT variable but that does not seem to be used by anything?

Can anyone shed some light on this? Thanks!


Ward



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>> This message is from an external sender. Learn more about why this <<
>> matters at https://links.utexas.edu/rtyclf.                        <<

[Lmod-users] Some modules not list

[Aziz Ö. <azi...@ed...>]

Hi there all lmod users,
I've installed lmod-ohpc package on SUSE 15.6 and some of the modules 
are not listing on module avail command.
For example starcc+ module is not listing but I can load it with module 
load command. module -D load starccm+ command output log is attached. 
What can be the problem.

-- 
Best regards,
Aziz Öğütlü

Eduline Bilişim Sanayi ve Ticaret Ltd. Şti.  www.eduline.com.tr
Merkez Mah. Ayazma Cad. No:37 Papirus Plaza
Kat:6 Ofis No:118 Kağıthane -  İstanbul - Türkiye 34406
Tel : +90 212 324 60 61     Cep: +90 541 350 40 72

[Lmod-users] after less command lua permission denied

[Aziz Ö. <azi...@ed...>]

Hi there all lmod users,
I've installed lmod-ohpc package on SUSE 15.6 and when I run less 
command with root user after close the command this error shows:

software:~ # less log
/opt/ohpc/admin/lmod/lmod/init/bash: 
/opt/ohpc/admin/lmod/lmod/libexec/addto: /usr/bin/lua5.3: bad 
interpreter: Permission denied

What can be the problem?

-- 
Best regards,
Aziz Öğütlü

Eduline Bilişim Sanayi ve Ticaret Ltd. Şti.  www.eduline.com.tr
Merkez Mah. Ayazma Cad. No:37 Papirus Plaza
Kat:6 Ofis No:118 Kağıthane -  İstanbul - Türkiye 34406
Tel : +90 212 324 60 61     Cep: +90 541 350 40 72

[Lmod-users] Suse cannot load lmod.sh on profile.d

[Aziz Ö. <azi...@ed...>]

Hi there all lmod users,
I've installed lmod-ohpc on SUSE 15.6 and for root user 
/etc/profile.d/lmod.sh file cannot automatically load. Because of that 
module command cannot run. What can be the problem?

-- 
Best regards,
Aziz Öğütlü

Eduline Bilişim Sanayi ve Ticaret Ltd. Şti.  www.eduline.com.tr
Merkez Mah. Ayazma Cad. No:37 Papirus Plaza
Kat:6 Ofis No:118 Kağıthane -  İstanbul - Türkiye 34406
Tel : +90 212 324 60 61     Cep: +90 541 350 40 72

Re: [Lmod-users] FPATH

[Ward P. <wpo...@gm...>]

Hi Robert,

So what does the FPATH variable do? Can we safely disable it?

And why is this addto command being run inside a script that doesn't call anything Lmod command?

Ward

On 1/04/2025 17:31, Robert McLay wrote:
> Support for ksh is there so that bash/zsh users can run the module command in Ksh scripts.
>
> Best,
> Robert.
>
> ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
> *From:* Ward Poelmans <wpo...@gm...>
> *Sent:* Tuesday, April 1, 2025 9:25 AM
> *To:* lmod-users <lmo...@li...>
> *Subject:* [Lmod-users] FPATH
> Hi Lmod people,
>
> We've noticed that our task prolog in Slurm is executing the following command:
> /usr/bin/lua /usr/share/lmod/lmod/libexec/addto --append FPATH /usr/share/lmod/lmod/init/ksh_funcs /usr/share/lmod/lmod/init/ksh_funcs
>
> Can anyone tell what this is and why it runs? We don't use ksh, only bash. ksh is installed because GPFS needs it.
>
> I see an `export FPATH=...` like in the `init/bash` of Lmod but I don't understand why it's there. There is also a LMOD_KSH_SUPPORT variable but that does not seem to be used by anything?
>
> Can anyone shed some light on this? Thanks!
>
>
> Ward
>
>
>
> _______________________________________________
> Lmod-users mailing list
> Lmo...@li...
> https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Flmod-users&data=05%7C02%7C%7Cf5a18c5b4d7f4d5a0e6a08dd7131ce9d%7C31d7e2a5bdd8414e9e97bea998ebdfe1%7C0%7C0%7C638791180913272947%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=YWhZCMwbBbcnIvBQnuJHxhk%2FfLM1JjcfsXrnHddAoAo%3D&reserved=0 <https://lists.sourceforge.net/lists/listinfo/lmod-users>
> >> This message is from an external sender. Learn more about why this <<
> >> matters at https://links.utexas.edu/rtyclf. <<
>

Re: [Lmod-users] FPATH

[Robert M. <mc...@ta...>]

Support for ksh is there so that bash/zsh users can run the module command in Ksh scripts.

Best,
Robert.

________________________________
From: Ward Poelmans <wpo...@gm...>
Sent: Tuesday, April 1, 2025 9:25 AM
To: lmod-users <lmo...@li...>
Subject: [Lmod-users] FPATH

Hi Lmod people,

We've noticed that our task prolog in Slurm is executing the following command:
/usr/bin/lua /usr/share/lmod/lmod/libexec/addto --append FPATH /usr/share/lmod/lmod/init/ksh_funcs /usr/share/lmod/lmod/init/ksh_funcs

Can anyone tell what this is and why it runs? We don't use ksh, only bash. ksh is installed because GPFS needs it.

I see an `export FPATH=...` like in the `init/bash` of Lmod but I don't understand why it's there. There is also a LMOD_KSH_SUPPORT variable but that does not seem to be used by anything?

Can anyone shed some light on this? Thanks!


Ward



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Lmod-users mailing list
Lmo...@li...
https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.sourceforge.net%2Flists%2Flistinfo%2Flmod-users&data=05%7C02%7C%7Cf5a18c5b4d7f4d5a0e6a08dd7131ce9d%7C31d7e2a5bdd8414e9e97bea998ebdfe1%7C0%7C0%7C638791180913272947%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=YWhZCMwbBbcnIvBQnuJHxhk%2FfLM1JjcfsXrnHddAoAo%3D&reserved=0<https://lists.sourceforge.net/lists/listinfo/lmod-users>
>> This message is from an external sender. Learn more about why this <<
>> matters at https://links.utexas.edu/rtyclf.                        <<

[Lmod-users] FPATH

[Ward P. <wpo...@gm...>]

Hi Lmod people,

We've noticed that our task prolog in Slurm is executing the following command:
/usr/bin/lua /usr/share/lmod/lmod/libexec/addto --append FPATH /usr/share/lmod/lmod/init/ksh_funcs /usr/share/lmod/lmod/init/ksh_funcs

Can anyone tell what this is and why it runs? We don't use ksh, only bash. ksh is installed because GPFS needs it.

I see an `export FPATH=...` like in the `init/bash` of Lmod but I don't understand why it's there. There is also a LMOD_KSH_SUPPORT variable but that does not seem to be used by anything?

Can anyone shed some light on this? Thanks!


Ward