Hi Lulu,
I'm afraid you're going to have to recognise that Solr 5.2.1 is very
out-of-date and the changes between this version and the current 8.x
releases are significant. A direct jump is I think the only sensible
option.
Although you could take the current configuration and attempt to upgrade
it to work with 8.x, I recommend that you should take the chance to look
at your whole infrastructure (from data ingestion through to query
construction) and consider what needs upgrading/redesigning for both
performance and future-proofing. You shouldn't just attempt a
lift-and-shift of the current setup - some things just won't work and
some may lock you into future issues. If you're running at large scale
(I've talked to some people at the BL before and I know you have some
huge indexes there!) then a redesign may be necessary for scalability
reasons (cost and feasibility). You should also consider your skills
base and how the team can stay up to date with Solr changes and modern
search practice.
Hope this helps - this is a common situation which I've seen many times
before, you're certainly not the oldest version of Solr running I've
seen recently either!
best
Charlie
On 09/02/2021 01:14, Paul, Lulu wrote:
Hi SOLR team,
Please may I ask for advice regarding upgrading the SOLR version (our project
currently running on solr-5.2.1) to the latest version?
What are the steps, breaking changes and potential issues ? Could this be done
as an incremental version upgrade or a direct jump to the newest version?
Much appreciate the advice, Thank you!
Best Wishes
Lulu
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Charlie Hull - Managing Consultant at OpenSource Connections Limited
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Founding member of The Search Network <https://thesearchnetwork.com/>
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