Re: [HTCondor-users] HTcondor 10.x no longer the right thing to use?

["Hitchen, Greg (IM&T, Kensington WA)" <Greg.Hitchen@xxxxxxxx>]

LOL

We're a windows execute and submit pool with linux VMs (Ubuntu 20.04) central managers all running HTCondor
versions 8.8.12 and 8.8.13!

Well, we're not supposed to be. The pool was "deprecated" a couple of years ago for a variety of reasons.
However, a certain research group, and their spinoff company had a contract with the organisation that we
needed to provide them with the resources to run their embarrassingly parallel monte carlo code so the pool
stayed active. However resources are dwindling as no new PCs are being added as old ones fall off.
Meanwhile they are being given assistance to port their code to run on our linux HPC systems. They have their
own PC based front end gui submission system so not straightforward. 
Anyway, the panic has set in as ubuntu 20.04 is EOL April 2025 so I have had to run up new ubuntu 22.04 VMs
as central managers and install HTCondor 24.4.0 
I'm happy to report that everything hangs together and works fine with the mix of windows execute 8.8.12 and
submit nodes and the linux 24.4.0 collector/negotiator.
Also replacing our ganglia and nagios monitoring VMs.

Thanks HTCondor project for making me look good. ð

Cheers

Greg

-----Original Message-----
From: HTCondor-users <htcondor-users-bounces@xxxxxxxxxxx> On Behalf Of Todd L Miller via HTCondor-users
Sent: Tuesday, 11 February 2025 5:49 AM
To: HTCondor-Users Mail List <htcondor-users@xxxxxxxxxxx>
Cc: Todd L Miller <tlmiller@xxxxxxxxxxx>
Subject: Re: [HTCondor-users] HTcondor 10.x no longer the right thing to use?

> I must have missed a memo somewhere along the way.

 	Unfortunaly, our release manager is away, so I can't tell you for 
sure if we deliberately removed the 10.x repository or not.  However, 10.x 
is certainly out of support by now; we don't support feature-series 
releases for as long we do LTS releases, and the LTS release (10.0.x) has 
probably gone out of support.

 	(The general idea is that "The previous LTS release is supported 
for approximately one year after a new LTS version is released."* We 
released version 23 on September 29, 2023; version 10 was the previous LTS 
release, and thus fell out of support around September 29, 2024 (probably 
on October 31, when we released version 24).)

> I'm seeing hints I should be using something other than 10.x but I 
> wanted to make sure I was going the right direction before I rip 
> everything out.

 	We generally recommend that everyone use a supported version of 
HTCondor, and that when you upgrade, you upgrade as far as you're 
comfortable doing, so that you don't have to do it again any time soon.

 	There's an upgrade guide for going from 10 to 23:

https://htcondor.readthedocs.io/en/23.0/version-history/upgrading-from-10-0-to-23-0-versions.html

and another for going from 23 to 24:

https://htcondor.readthedocs.io/en/latest/version-history/upgrading-from-23-0-to-24-0-versions.html

if I recall correctly, the upgrade from 10 to 23 is rougher than the 
upgrade from 23 to 24.

 	If your HTCondor pool's configuration isn't particularly 
complicated, it may be easier to remove 10.x and install 24.x from 
scratch, rather than upgrading your old configuration twice.

-- ToddM

*: https://htcondor.readthedocs.io/en/latest/version-history/introduction-version-history.html
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