I am building a system that has database operations that has millions of records.I am using Zend Framework in all part of my project.I wanted to use a search indexing technique but have you got any advice on this?which technique should i use?
Thanks in advance
Zend Lucene absolutely unrelevant for "millions of records".
Try to use sphinx http://sphinxsearch.com/docs/manual-1.10.html.
It has many usefull fratures, including clasterization to many servers; smart, customizable result ranking and much more. And it is really fast. PHP API docs: http://www.php.net/manual/en/book.sphinx.php
There is C-version of PHP API http://pecl.php.net/package/sphinx