Which Lucene search syntax is faster

[johnmunir]

Hi,


Given the following Lucene document that I’m adding to my index(and I expect to 
have over 10 million of them, each with various sizes from 1 Kbto 50 Kb:


<add>
  <doc>
    <fieldname="doc_type">PDF</field>
    <fieldname="title">Some name</field>
    <fieldname="summary">Some summary</field>
    <fieldname="owner">Who owns this</field>
    <fieldname="price">10</field>
    <fieldname="isbn">1234567890</field>
  </doc>
  <doc>
    <fieldname="doc_type">DOC</field>
    <fieldname="title">Some name</field>
    <fieldname="summary">Some summary</field>
    <fieldname="owner">Who owns this</field>
    <fieldname="price">10</field>
    <fieldname="isbn">0987654321</field>
  </doc>
  <!-- and more doc's -->
</add>



My question is this: what Lucene search syntax will give meback result the 
fastest?  If my user is interestedin finding data within “title” and “owner” 
fields only “doc_type” “DOC”, shouldI build my Lucene search syntax as:
 
1) skyfall ian fleming AND doc_type:DOC
2) title:(skyfall OR ian OR fleming) owner:(skyfall OR ian ORfleming) AND 
doc_type:DOC
3) Something else I don't know about.


Of the 10 million documents I will be indexing, 80% will be of "doc_type" PDF, 
and about 10% of type DOC, so please keep that in mind as a factor (if that 
will mean anything in terms of which syntax I should use).


Thanks in advanced,
 
- MJ