I think the FieldCache API fits for this...
Its purpose is to do a one-time caching of a particular field's
values, rendered as a straight array keyed by document ID. So
building that cache initially takes time and memory, but then getting
the value for a particular document is extremely fast assuming your OS
is not swapping...
Mike
blazingwolf7 wrote:
Well, according to him, using the reader to access the index
everytime a
document is found to retrieve certain values is inefficient. Meaning
if
there is 500k document, the index will be access 500k times. It
might affect
the performance of the search.
So I am instructed to retrieve all the necessary values at the
beginning of
the search and store it. Later the values will be retrieve from
there. I am
cracking my head trying to do that%-|
Grant Ingersoll-6 wrote:
On Jul 10, 2008, at 1:42 AM, blazingwolf7 wrote:
Well, I am trying to extract the URL and contentLength from the
".fdt" file.
I am planning to use both of these values in a filter to remove
certain
links to be display in the search result. The problem is, I am told
not to
use the IndexReader to retrieve these values for each document found
matching with the query.
Are you implying that using the IR would solve your problem, but for
some reason you're architect (or whatever you call the person making
the decisions) told you not to? If so, can you explain more the
reasoning?
So now, instead, I will have to retrieve the entire .fdt file,
extract both
the values and store it into an arraylist which will be use later.
I am
having problem extracting the entire file without using all the
seek()
method to determine the position of the document.
Any suggestion?
Yonik Seeley wrote:
On Wed, Jul 9, 2008 at 11:13 PM, blazingwolf7
<[EMAIL PROTECTED]>
wrote:
Sorry,but I am still quite new to Lucene. What exactly is "cp"?
The unix command for copy (hence the smiley).
Some of your recent questions seem to be suffering from an XY
problem:
http://www.perlmonks.org/index.pl?node_id=542341
You may get more help by explaining what you are trying to do.
-Yonik
Yonik Seeley wrote:
On Wed, Jul 9, 2008 at 9:01 PM, blazingwolf7 <[EMAIL PROTECTED]
wrote:
I had recently found out that Lucene will retrieve the content
of a
document
from a file ".fdt". I am trying to retrieve the entire file in
one go
instead of retrieving it based on document number. can it be
done?
"cp" can retrieve the file on one go ;-)
Other than that, the format is documented here:
http://lucene.apache.org/java/docs/fileformats.html
But I'm not sure why retrieving by document number won't work for
you.
-Yonik
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Grant Ingersoll
http://www.lucidimagination.com
Lucene Helpful Hints:
http://wiki.apache.org/lucene-java/BasicsOfPerformance
http://wiki.apache.org/lucene-java/LuceneFAQ
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