Hi,
The 20000 products I mentioned are 20000 rows. I get the products in
bulk by using a limit clause.
I am using hibernate with MySQL server on a 2.8GHz, 1.00GB Ram machine.
I am baffled that 1.2 or 1.5 million records are being indexed in 20
minutes compared to the 20000 records I am indexing in 22 minutes. One
possibility is that the hardware you guys are using is much better. I do
not know what else can cause the indexing to be so slow. Where am I
going wrong with this?
This is the gist of what I am doing in my indexer for all products:
Product prod = list.next();
Document doc = new Document();
String name = prod.getName();
Description desc
=(Description)prod.getDescriptions().get(Description.LONG);
String longDesc = null, shortDesc = null, content = null;
if(desc != null)
longDesc = desc.getText();
else
longDesc = "";
desc = (Description)prod.getDescriptions().get(Description.SHORT);
if(desc != null)
shortDesc = desc.getText();
else
shortDesc = "";
content = name + " " + shortDesc + " " + longDesc + " ";
doc.add(Field.UnIndexed("id", prod.getId() + ""));
doc.add(Field.Keyword("entity","product"));
doc.add(Field.Text("name", name));
doc.add(Field.Text("shortDescription", (shortDesc.equals("") ? "" :
shortDesc)));
doc.add(Field.Text("longDescription", (longDesc.equals("") ? "" :
longDesc)));
doc.add(Field.Text("content", content));
try
{
writer.addDocument(doc);
}
catch (IOException e)
{
log.error("Error adding document: " + e.getMessage());
}
Where could I be slowing down the indexing process? Is it because I am
indexing the longDescription as a Field.Text? (longDescription could
have a fair amount of text averaging about 4000 words).
Any ideas?
Thanks,
Mufaddal.
-----Original Message-----
From: Daniel Herlitz [mailto:[EMAIL PROTECTED]
Sent: Tuesday, April 19, 2005 2:16 PM
To: java-user@lucene.apache.org
Subject: Re: Lucene bulk indexing
Agree. We run an index with about 2.5 million documents and around 30
fields. The indexing itself of 20000 items should only take a few
seconds on a reasonably fast machine.
/D
Kevin L. Cobb wrote:
>I think your bottleneck is most likely the DB hit. I assume by 20000
>products you mean 20000 distinct entries into the Lucene Index, i.e.
>20000 rows in the DB to select from.
>
>I index about 1.5 million rows from a SQL Server 2000 database with
>several fields for each entry and it finishes in about twenty minutes
so
>you should be able to index 20000 rows in a few seconds.
>
>Make sure your database table(s) are indexed appropriately according to
>your select statements. Indexing correctly will be the biggest
>performance improvement you will see.
>
>Best of luck.
>
>KLCobb
>
>-----Original Message-----
>From: Mufaddal Khumri [mailto:[EMAIL PROTECTED]
>Sent: Tuesday, April 19, 2005 2:11 PM
>To: java-user@lucene.apache.org
>Subject: Lucene bulk indexing
>
>Hi,
>
>I am sure this question must be raised before and maybe it has been
even
>answered. I would be grateful, if someone could point me in the right
>direction or give their thoughts on this topic.
>
>The problem:
>
>I have approximately over 20000 products that I need to index. At the
>moment I get X number of products at a time and index them. This
process
>takes about 26 minutes (Am indexing the database id, product name,
>product description).
>
>I was thinking of ways to make this indexing faster. For this I was
>thinking about writing a threaded module that would index X number of
>products simultaneously. For instance I could spawn (Number of
>products/X) number of threads and do the indexing. I am guessing this
>would be faster but by what factor would this be faster? (I understand
>the writes to the index are synchronized by lucene).
>
>Is there any other approach by which I could speed up the indexing?
>Thoughts? Suggestions?
>
>Thanks,
>Mufaddal.
>
>
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