Re: ExportWriter (Optionally) Supporting Stored Fields

[Jason Gerlowski <ge...@gmail.com>]

Hey Luke,

I think that's worth contributing.  Folks who come in planning to use
"/export" are likely to have DV's enabled most places, but I imagine
there's a lot of folks who only learn about "/export" after their data
is indexed and might benefit from "stored=true" being an option there.

Do you have any sense for how using stored vs. DV fields impacts the
performance of /export?

Best,

Jason

On Mon, Nov 17, 2025 at 11:02 AM Luke Kot-Zaniewski (BLOOMBERG/ 919
3RD A) <lk...@bloomberg.net> wrote:
>
> Hi All,
>
> I've come to enjoy Solr's streaming support with export writer very much,
> so when I ran into a case where I needed to extract non-dv stored fields
> I was motivated to equip ExportWriter with this power. I have a patch that
> does this, or at least appears to do this. I would be happy to share but
> wanted to gauge interest and solicit any opinions on the mailing list first.
> I realize DVs are usually better but this is in case you don't have DVs.
>
> Thanks,
> Luke
>

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Re: ExportWriter (Optionally) Supporting Stored Fields

[Rahul Goswami <ra...@gmail.com>]

Hi Luke,
I think this would be a very useful contribution, mainly since it removes
one more constraint for the user to be cognizant of while using /export.
I have found myself switching to cursorMark in cases where I needed to work
with fields which are non-DV stored, which is a few more lines of
boilerplate code, and so this would be a welcome enhancement.

Thanks,
Rahul




On Tue, Dec 2, 2025 at 9:52 AM Jason Gerlowski <ge...@gmail.com>
wrote:

> Hey Luke,
>
> I think that's worth contributing.  Folks who come in planning to use
> "/export" are likely to have DV's enabled most places, but I imagine
> there's a lot of folks who only learn about "/export" after their data
> is indexed and might benefit from "stored=true" being an option there.
>
> Do you have any sense for how using stored vs. DV fields impacts the
> performance of /export?
>
> Best,
>
> Jason
>
> On Mon, Nov 17, 2025 at 11:02 AM Luke Kot-Zaniewski (BLOOMBERG/ 919
> 3RD A) <lk...@bloomberg.net> wrote:
> >
> > Hi All,
> >
> > I've come to enjoy Solr's streaming support with export writer very much,
> > so when I ran into a case where I needed to extract non-dv stored fields
> > I was motivated to equip ExportWriter with this power. I have a patch
> that
> > does this, or at least appears to do this. I would be happy to share but
> > wanted to gauge interest and solicit any opinions on the mailing list
> first.
> > I realize DVs are usually better but this is in case you don't have DVs.
> >
> > Thanks,
> > Luke
> >
>
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