lucene-solr-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Lance Norskog <>
Subject Re: Returning to Solr 4.0 from 4.1
Date Sat, 02 Mar 2013 03:42:42 GMT
Yes, the SolrEntityProcessor can be used for this.
If you stored the original document bodies in the Solr index!
You can also download the documents in Json or CSV format and re-upload 
those to old Solr. I don't know if CSV will work for your docs.  If CSV 
works, you can directly upload what you download. If you download JSON, 
you have to "unwrap" the outermost structure and upload the data as an 

There are problems with the SolrEntityProcessor.1)  It is 
single-threaded. 2) If you 'copyField' to a field, and store that field, 
you have to be sure not to reload the contents of the field, because you 
will add a new copy from the 'source' field.

On 03/01/2013 04:48 AM, Alexandre Rafalovitch wrote:
> What about SolrEntityProcessor in DIH?
> Regards,
>      Alex.
> Personal blog:
> LinkedIn:
> - Time is the quality of nature that keeps events from happening all at
> once. Lately, it doesn't seem to be working.  (Anonymous  - via GTD book)
> On Fri, Mar 1, 2013 at 5:16 AM, Dotan Cohen <> wrote:
>> On Fri, Mar 1, 2013 at 11:59 AM, Rafał Kuć <> wrote:
>>> Hello!
>>> I assumed that re-indexing can be painful in your case, if it wouldn't
>>> you probably would re-index by now :) I guess (didn't test it myself),
>>> that you can create another collection inside your cluster, use the
>>> old codec for Lucene 4.0 (setting the version in solrconfig.xml should
>>> be enough) and re-indexing, but still re-indexing will have to be
>>> done. Or maybe someone knows a better way ?
>> Will I have to reindex via an external script bridging, such as a
>> Python script which requests N documents at a time, indexes them into
>> Solr 4.1, then requests another N documents to index? Or is there
>> internal Solr / Lucene facility for this? I've actually looked for
>> such a facility, but as I am unable to find such a thing I ask.
>> --
>> Dotan Cohen

View raw message