[lustre-discuss] munlink

[David Simpson - Staff in University IT, Research Technologies / Staff Technoleg Gwybodaeth, Technolegau Ymchwil]

Thanks for the prompt reply and clarification.

Came across this afterwards:

https://github.com/lustre/lustre-release/commit/4774d1fab1ba701900aae61ae40987e64af7a635

lfs find + unlink  is the way to go then.

thanks
David


----------

David Simpson - Senior Systems Engineer

ARCCA, Redwood Building,

King Edward VII Avenue,

Cardiff, CF10 3NB



David Simpson - peiriannydd uwch systemau

ARCCA, Adeilad Redwood,

King Edward VII Avenue,

Caerdydd, CF10 3NB





From: Andreas Dilger <adilger at ddn.com>
Date: Saturday, 27 September 2025 at 00:42
To: David Simpson - Staff in University IT, Research Technologies / Staff Technoleg Gwybodaeth, Technolegau Ymchwil <SimpsonD4 at cardiff.ac.uk>
Cc: lustre-discuss at lists.lustre.org <lustre-discuss at lists.lustre.org>
Subject: Re: [lustre-discuss] munlink

External email to Cardiff University - Take care when replying/opening attachments or links.
Nid ebost mewnol o Brifysgol Caerdydd yw hwn - Cymerwch ofal wrth ateb/agor atodiadau neu ddolenni.


The "munlink" utility is really just a few line wrapper around the unlink() syscall, so should be OK for any environment.  In both cases they avoid a lot of overhead that "rm" is doing.

Modern Linux distros have "unlink", which is almost the same as munlink except only accepts a single filename as an argument, while munlink can handle multiple filenames at once, but this can be worked around in the caller.

Cheers, Andreas

On Sep 25, 2025, at 06:51, David Simpson - Staff in University IT, Research Technologies / Staff Technoleg Gwybodaeth, Technolegau Ymchwil via lustre-discuss <lustre-discuss at lists.lustre.org> wrote:


We don’t appear to have munlink installed on any of our servers or clients on a system we are going to tidy a bit.

Is there any concern about installing it from the below - on a client/utility server? (I’m assuming not, but would be good to have affirmation)

In general, I can’t find much information on munlink. I assume it’s modified unlink.

Name        : lustre-client-tests
Arch        : x86_64
Version     : 2.12.7
Release     : 1.el7

The utility-server-client in question is on lfs 2.12.7. Infrastructure servers are also on this version.

We are planning to get off this system soon, however we are considering using munlink instead of rm to do some tidying.

regards
David



----------
David Simpson - Senior Systems Engineer
ARCCA, Redwood Building,
King Edward VII Avenue,
Cardiff, CF10 3NB



David Simpson - peiriannydd uwch systemau
ARCCA, Adeilad Redwood,
King Edward VII Avenue,
Caerdydd, CF10 3NB

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Cheers, Andreas
—
Andreas Dilger
Lustre Principal Architect
Whamcloud/DDN




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