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From Jihwan Kim <>
Subject Re: Enhancement on a getFloats method of ?
Date Wed, 05 Oct 2016 02:59:11 GMT
"The array is indexed by internal lucene docid," --> If I understood
correctly, it is done inside the for loop that I briefly showed.

In the following code I used, the 'vals' points to an array object and the
latestCache puts the reference of the same array object.  Then, the index
decision and assigning a value in the array object is happening inside the
for loop in the getFloats.  So, the latestCache still hold same array
object after the index decision is made along with value assignment from a
value in the external file.

During a QueryHandler (If I understood it correctly), I noticed that
another array per segment is created (with a size 20 when I looked at) and
this array is used query results & values in the float array by calling the
public Object get(IndexReader reader, Object key) method.  This get method
uses the same float array created by the getFloats.

vals = new float[reader.maxDoc()];

latestCache.put(ffs.field.getName(), vals);

Am I missing something? Any feedback will be helpful to understand the Solr

Thank you,


On Tue, Oct 4, 2016 at 8:35 PM, Yonik Seeley <> wrote:

> On Tue, Oct 4, 2016 at 10:09 PM, Jihwan Kim <> wrote:
> > I would like to ask the Solr organization an enhancement request.
> >
> > The FileFloatSource creates a cache value from an external file when a
> Core
> > is reloaded and/or a new searcher is opened.  Nevertheless, the external
> > files can be changed less frequently.
> >
> [...]
> > When the version was not changed, we can still use the cached array
> without
> > creating a new one.
> The array is indexed by internal lucene docid, which can change across
> different views of the index (a commit).
> What we can do is cache per segment though.  When this class was
> originally written, we didn't have access to individual segments.
> -Yonik

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