6. The search system as set forth in claim 5 , wherein, after said reflection processing of said first updated document against said second search index began, said index search controller to clear said first updating candidate document storage device, said index search controller to store data of an updated document relating to a new update request in said first updating candidate document storage device, said string pattern matching controller to store said document ID of said updated document relating to said new update request into said first and second document ID managers, and said string pattern matching controller to store said data of said updated document relating to said new request is stored in said first and second pattern matching document storage devices.
5. The search system as set forth in claim 4 , wherein, before said reflection processing of said first updated documents against said second search index begins, said index search controller to store data of an updated document relating to a new update request into said first and second updating candidate document storage devices, said string pattern matching controller to store a document ID of said update document relating to said new update request into said first document ID manager, and said string pattern matching controller to store said data of said updated document relating to said new update request in said first pattern matching document storage device.