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https://issues.apache.org/jira/browse/SOLR-10803?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16034822#comment-16034822
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Uwe Schindler edited comment on SOLR-10803 at 6/2/17 3:02 PM:
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bq. FieldCache
I'd suggest to also enable DocValues by default for all string/numeric/date
fields, unless explicitly disabled. I have seen that Solr 7 allows to merge
non-docvalues segments to ones with docvalues using uninverter with a special
mergepolicy. IMHO, this merge policy should be the default, just printing a
line of information to the logs, so users know that their index segments are
updated and this may temporarily require more ram. When using an index created
with 7.x (maybe using the new metadata added by [~jpountz] recently) and
something tries to access FieldCache (e.g. for sorting or facetting or
functions), it should fail the query.
In addition, the merge policy could also be used to convert Trie* to Point*
values by first uninverting (if no docvalues on trie) and redindexing the
fields during merging... (not sure how to do this, but should work somehow).
was (Author: thetaphi):
bq. FieldCache
I'd suggest to also enable DocValues by default for all string/numeric/date
fields, unless explicitly disabled. I have seen that Solr 7 allows to merge
non-docvalues segments to ones with docvalues using uninverter with a special
mergepolicy. IMHO, this merge policy should be the default, just printing a
line of information to the logs, so users know that their index segments are
updated and this may temporarily require more ram. When using an index created
with 7.x (maybe using the new metadata added by [~jpountz] recently) and
something tries to access FieldCache (e.g. for sorting or facetting or
functions), it should fail the query.
> Solr should refuse to create Trie*Field instances in 7.0 indices
> ----------------------------------------------------------------
>
> Key: SOLR-10803
> URL: https://issues.apache.org/jira/browse/SOLR-10803
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Adrien Grand
> Priority: Blocker
> Fix For: master (7.0)
>
>
> If we want to be able to remove support for legacy numerics from Solr in 8.0,
> we need to forbid the use of Trie*Field in indices that are created on or
> after 7.0.
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