SQL Storage for fast retrieval from archives

[Ramprasad]

Hi,
  I am trying to use cyrus for my mail archives ( typically 1GB-10GB per
user ) for say 100 users 

What is the best way of storing mails. There will not be much of
add/delete from these archives but retrieval has to be fast on header or
body search. 

Cyrus with the current storage ( one mail per file ) is good enough for
header search , but fails on body search. 

Does cyrus have an option to store in MySQL etc. I think body search
will be much faster with SQL

Thanks
Ram