On Thu, 16 Feb 2023 at 15:42, Mark H. Wood <[email protected]> wrote:

> On Thu, Feb 16, 2023 at 09:41:25AM +0200, Sean Carte wrote:
> > On the Slack tech-support channel, Nicholas Woodward reported that he had
> > recreated the cores 'by copying the new statistics core into a new Solr
> > configset, e.g. statistics-2022, for each previous year and changing the
> > schema name in schema.xml. Then after restarting Solr I was able to
> import
> > all of the old stats CSV files.'
> >
> > I was about to try this, when I realised I'd made a mistake and imported
> > all my sharded statistics into the main core. I'm actually fine with
> that,
> > unless someone here tells me that that was a terrible thing to do.
>
> That's actually what the upgrade procedure ought to do, because
> sharding was not included when working out the separation of Solr from
> the DSpace build (which was required by changes in the packaging of
> currently supported Solr versions).  There may be a way to make it
> work, but the tools that currently come with DSpace will not help.
>
> Sharding is awaiting some discussion:
>
> o  Does sharding actually help?
>
> o  Consider that we are abusing a feature which was meant for
>    evenly spreading load across multiple hosts.
>
> o  This could be done much more simply and organically, without
>    involving DSpace code at all, using Time Routed Aliases, but TRA
>    requires Solr Cloud, which runs a bit differently.  Is the benefit
>    of sharding (whatever that actually is) worth the trouble to set up
>    a (possibly degenerate) Cloud?
>
> --
> Mark H. Wood
>

Thanks, Mark. That's good to know. And it certainly makes my life easier
having everything in a single core.

Sean

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