Strategy for fts and Replication

[Philon]

Hi Francis,

next to fts-solr there was fts-lucene. But that Lucene there seems heavily outdated why the Dovecot docs also suggest using Solr. Elasticsearch probably is similar to Solr but the later is maintained by Dovecot team.

I started with downloading the Solr binary distribution to Debian with JRE preinstalled and things were running like after 10 min. Yes it’s a bit more complicated to find the schema and edit things like header size (in tips section). It’s running quite nicely since then and has zero maintenance.

As FTS indexes are separate in external Solr instance I’d guess that it won’t interfere with dsync. What I don’t know is if dsync’ing would trigger indexing. This brings me to wonder how one could actually replicate the Solr instance!?


Philon

> On 31 Jan 2020, at 17:24, Francis Augusto Medeiros-Logeay <r_f at med-lo.eu> wrote:
> 
> Hi there,
> 
> I got successfully to replicate my mail server to another dovecot install using dsync, mainly for redundancy, and it works great.
> 
> I want to try to install fts, as some of the mailboxes have tens of thousands of messages, and it takes minutes to get some results when searching via IMAP on a Roundcube interface.
> 
> I want to experiment with fts-solr first, and firstly on my redundant server, ie., not on my main dovecot install. Is it ok to do this? I ask because I am afraid of how this whole reindexing on the redundant install will affect the production server.
> 
> Also, any tips on something else than fts-solr? I tried it once, but it was so hard to get it right, so many configurations, java, etc., that I'd rather try something else. I also could try fts-elastic or something like that, but, again, having to maintain an elasticsearch install might use more resources than I think is worth. Any thoughts on that?
> 
> Best,
> 
> --
> Francis
>