Hi Walter,

>From a strict feasibility point of view, 2 totally separate Solr instances can 
>perfectly run on the same server: this would be 2 distinct JVM process, I 
>don't foresee any issue.
Nothing specific to look for except different ports, directories...

Do you mean using the same indexes? Having the 2 instances being part of same 
cluster?
I guess not as you talk about a DEV and a PROD instance.

Hoewever, there are multiple reasons not to do that and if I were asked to, **I 
would strongly advise not to do it**.
Using the same server for different environments sounds contracdictory to me 
(for instance, you could easily crash your prod instance by having you dev 
instance going crazy...)

Another thing to consider is the major version difference between you DEV and 
PROD instances. Unless you are migrating from 7.x your DEV first, then your 
PROD. I would have the same version in DEV as in PROD.

Gaël

De : Walter Claassen <c...@cid.is>
Envoyé : lundi 25 janvier 2021 13:42
À : solr-user@lucene.apache.org <solr-user@lucene.apache.org>
Objet : Run multiple (different) Solr versions on a server 
 
Hi all,

is it possible to run multiple (different) Solr versions on a (Debian) 
server?
For development and production purposes I'd like to run 
- a development version (Solr 8.7.0) and
- a productive version (Solr 7.4.0).
Which settings are available/necessary?

Thanks
Walter Claassen

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