[Koha] Zebra required if using Elasticsearch?

[Ere Maijala]

Tasha,

I know my response is coming late, but I'm trying to catch up with a 
long queue of stuff from the holiday season.

You should be able to run without Zebra as long as you observe the 
following caveats:

- Browse search in OPAC is broken in Koha 20.11.00, but should be fixed 
in 20.11.01 (see 
https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=27200).

- The zebraqueue table will fill up unless manually cleared (or with a 
cron job of some kind) when the Zebra indexing daemon is running. 
Perhaps we could soon switch it off when Elasticsearch is used, but it 
has been kept there for situations where both Zebra has been kept 
running for Z39.50 etc. (there's now Z39.50 responder that support ES too).

- Zeno mentioned the scan index feature, but it should be working now 
(https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=22592). It's 
not quite the same as with Zebra, but it usually provides good enough 
results.

Best,
Ere

Bales (US), Tasha R kirjoitti 16.12.2020 klo 23.01:
> Good afternoon,
> 
> I think the answer to the question in my subject is, "yes", but I'd like to check my understanding.  After installing Koha in a VM and reviewing various documentation, my understanding was that using Zebra or Elasticsearch was an either/or choice, you use one or the other.  However, the Elasticsearch entry on the wiki<https://wiki.koha-community.org/wiki/Elasticsearch> suggests that eliminating Zebra dependency in favor of going full Elasticsearch is a work in progress.  Is this accurate?
> 
> I'm asking because I'm anticipate trouble getting access to download RHEL packages for Zebra<https://www.indexdata.com/resources/software/zebra/>.  I was hoping we could entirely avoid it and just use Elasticsearch.
> 
> Thanks for your time!!
> 
> 
> 
> Tasha R. Bales
> 
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-- 
Ere Maijala
Kansalliskirjasto / The National Library of Finland