lucene-solr-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Alessandro Benedetti <>
Subject Re: Is it safe to upgrade an existing field to docvalues?
Date Wed, 24 Aug 2016 11:42:54 GMT
Hi Toke !
Good stuff !

So basically using your tool you build a copy of the index ( similar to
what optimize does) without affecting the main index right ?
So the procedure would be :

1) Solr is running
2) Run the tool pointing to the Solr Index, this will be slow but will
generate a new index copying from the stored content to docValues
3) Stop Solr
4) Change Solr schema enabling docValues
5) Point to the new converted index
6) Start Solr

Am I right ?
This is actually a useful tool when re-indexing could be extremely long.


On Wed, Aug 24, 2016 at 12:05 PM, Toke Eskildsen <>

> On Tue, 2016-08-23 at 20:01 +0000, Ronald Wood wrote:
> > In general, is there a way to migrate existing indexes (we have
> > petabytes of data) by enabling docvalues and incrementally re-
> > indexing? We expect the latter would take a month using an atomic
> > update process.
> I did write a tool for that at some point, that works with Solr 4.x.
> It is not polished though, and the main problem is that it is slow to
> convert. Some details at
> ing-field-type-in-lucenesolr/
> - Toke Eskildsen


Benedetti Alessandro
Visiting card :

"Tyger, tyger burning bright
In the forests of the night,
What immortal hand or eye
Could frame thy fearful symmetry?"

William Blake - Songs of Experience -1794 England

  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message