In a clustered environment I search the index from the web
application. In the web application I am creating IndexReader on each
request. is it expensive to do like this? I read somewhere in the web
that try using the same reader as much as possible. Can i keep the
initially created IndexReader in the session/application scopes and
use the same for each request? Any other idea?
Viay
On 5/3/10, Vijay Veeraraghavan wrote:
dear all,
as replied below, does searching again for the document in the index
and if found skip the indexing else index it, is this not similar to
indexing all pdf documents once again, is not this overhead? As I am
not going to index the details of the pdf (so if an indexed pdf was
recreated i need not reindex it) but just the paths of the documents.
Vijay
--
Thanks & Regards
Vijay Veeraraghavan
--
Thanks & Regards
Vijay Veeraraghavan
dear all,
as replied below, does searching again for the document in the index
and if found skip the indexing else index it, is this not similar to
indexing all pdf documents once again, is not this overhead? As I am
not going to index the details of the pdf (so if an indexed pdf was
recreated i need not reindex it) but just the paths of the documents.
Vijay
Hey there,
you might have to implement a some kind of unique identifier using an
indexed lucene field. When you are indexing you should fire a query with
the
uuid of your document (maybe the path to you pdf document) and check if
the
document is in the index already. You could also do a boolean query
combining UUID, timestamp and / or a hash value to see if the document
has
been changed. if so you can simply update the document by its UUID
(something like indexwriter.updateDocument(new Term("uuid",
value),document);)
Unfortunately you have to implement this yourself but it should not be
that
much of a deal.
simon
On Mon, May 3, 2010 at 9:21 AM, Vijay Veeraraghavan <
vijay.raghavan08@gmail.com> wrote:
you might have to implement a some kind of unique identifier using an
indexed lucene field. When you are indexing you should fire a query with
the
uuid of your document (maybe the path to you pdf document) and check if
the
document is in the index already. You could also do a boolean query
combining UUID, timestamp and / or a hash value to see if the document
has
been changed. if so you can simply update the document by its UUID
(something like indexwriter.updateDocument(new Term("uuid",
value),document);)
Unfortunately you have to implement this yourself but it should not be
that
much of a deal.
simon
On Mon, May 3, 2010 at 9:21 AM, Vijay Veeraraghavan <
vijay.raghavan08@gmail.com> wrote:
Dear all,
I am using lucene 3.0 to index the pdf reports that I generate
dynamically. I index the pdf file name (without extension), file path
and its absolute path as fields. I search with the file name without
extension; it retrieves a list, as usually 2 or more files are present
in the same name in different sub directories. As I create the index
for the first time it updates, assuming 100 pdf files in different
directories, the files meta info. If again I do indexing, while my
report generator scheduler has the produced 500 more pdf files
totaling to 600 files in different directories, I wish to index only
the new files to the index. But presently it’s doing the whole thing
again (600 files). How to implement this functionality? Think of the
thousands of pdf files created on each run.
P.S: I cannot keep the meta-info of generated pdf files in the java
memory, as it exceeds thousands in a single run, and update the index
looping this list.
new IndexWriter(FSDirectory.open(this.indexDir), new StandardAnalyzer(
Version.LUCENE_CURRENT), true,
IndexWriter.MaxFieldLength.LIMITED);
is the boolean parameter is for this purpose? Please guide me.
--
Thanks
Vijay Veeraraghavan
--
Thanks & Regards
Vijay Veeraraghavan
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I am using lucene 3.0 to index the pdf reports that I generate
dynamically. I index the pdf file name (without extension), file path
and its absolute path as fields. I search with the file name without
extension; it retrieves a list, as usually 2 or more files are present
in the same name in different sub directories. As I create the index
for the first time it updates, assuming 100 pdf files in different
directories, the files meta info. If again I do indexing, while my
report generator scheduler has the produced 500 more pdf files
totaling to 600 files in different directories, I wish to index only
the new files to the index. But presently it’s doing the whole thing
again (600 files). How to implement this functionality? Think of the
thousands of pdf files created on each run.
P.S: I cannot keep the meta-info of generated pdf files in the java
memory, as it exceeds thousands in a single run, and update the index
looping this list.
new IndexWriter(FSDirectory.open(this.indexDir), new StandardAnalyzer(
Version.LUCENE_CURRENT), true,
IndexWriter.MaxFieldLength.LIMITED);
is the boolean parameter is for this purpose? Please guide me.
--
Thanks
Vijay Veeraraghavan
--
Thanks & Regards
Vijay Veeraraghavan
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--
Thanks & Regards
Vijay Veeraraghavan
--
Thanks & Regards
Vijay Veeraraghavan
--
Thanks & Regards
Vijay Veeraraghavan
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