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From "Robert Muir (JIRA)" <>
Subject [jira] [Commented] (SOLR-3855) DocValues support
Date Wed, 31 Oct 2012 19:12:11 GMT


Robert Muir commented on SOLR-3855:

Actually another idea is maybe there should be no default? And it wouldnt be too bad if we
combine docValuesType and docValues into one parameter.

So this way there is no trap (slow-io, or huge ram) on anyone. you would just say docValuesType=packed

Then down the road once docvalues is really worked out, we could have example fieldtypes for
various use cases (id, sort, scoring factors, etc) configured reasonably with whatever makes

I guess it doesnt matter to me if there is a default, and what the default is, as long as
we are careful to both offer and advertise the ram/disk option in the example (even if there
is actually a default).

for this initial patch, we could just make it so only "memory" actually works and you get
a UOE if you ask for direct. I feel like this is a good step to remove uninversion times,
etc and we could separately add the disk option... I'm just throwing out future ideas.

> DocValues support
> -----------------
>                 Key: SOLR-3855
>                 URL:
>             Project: Solr
>          Issue Type: Improvement
>            Reporter: Adrien Grand
>            Assignee: Adrien Grand
>            Priority: Minor
>             Fix For: 4.1, 5.0
>         Attachments: SOLR-3855.patch
> It would be nice if Solr supported DocValues:
>  - for ID fields (fewer disk seeks when running distributed search),
>  - for sorting/faceting/function queries (faster warmup time than fieldcache),
>  - better on-disk and in-memory efficiency (you can use packed impls).

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