We have begun looking at using nntpcache in our ISP operation. I have read the FAQ, and begun studying code. I was wondering if there is a known modification or version of the program that does not use mmap. We use the Qnx OS in our operation. It's implementation of mmap() does not appear to be completely compatible with nntpcache's requirements. Is there a way to redirect the mmap() code to use physical file i/o instead? I understand their may be a performance penalty, but with good hardware disk cache, I believe we can minimize the effect. --- Jim C., President | C a r r o l l - N e t, Inc. 201-488-1332 voice | New Jersey's Premier Internet Service Provider 201-487-5717 dialup | http://www.carroll.com | Ask about our Business Web Services