[slurm-users] Several slurmdbds against one mysql server?

[Ole Holm Nielsen]

Hi Angel,

On 5/1/23 11:28, Angel de Vicente wrote:
> Ole Holm Nielsen <Ole.H.Nielsen at fysik.dtu.dk> writes:
> 
>> If I read Brian's comments correctly, he's saying that Slurm already has a
>> well-tested and documented solution for multi-cluster sites: Federated clusters.
> 
> Thanks Ole. Don't get me wrong, I have nothing against using Federated
> clusters, and I guess I will probably end up going for it, but my
> question keeps just the same (as far as I understand nothing changes in
> that respect with multi-cluster or federated setting?): whether I should
> just run one slurmdbd daemon or several.

As Brian wrote:

> On a technical note: slurm keeps the detailed accounting data for each cluster in separate TABLES within a single database. 

In the Federation page https://slurm.schedmd.com/federation.html it is 
implicitly assumed that the sacctmgr command talks only to a single 
slurmdbd instance.  It is not, however, explicitly stated as an answer to 
your question.

You can see in another presentation that there is only a *single* slurmdbd 
in a federated multi-cluster scenario: 
https://slurm.schedmd.com/SLUG18/slurm_overview.pdf
Look at slide 28 "Typical Enterprise Architecture".

/Ole