Best background refresh strategy

Hi,

I'm trying monetdb as a bigtable for calendar based queries. I've created a 338 million rows / 54 columns table and ran queries in ms. That's perfect! I wonder to see if monetdb is suitable for a search service with high traffic (several hundred request per second) and which will the best data update strategy because during the "updates/insert/copy into" actions everything gets blocked. I would like to know how cluster mode will help as well.

Thanks, Gustavo Brian