Re: Online V7 and Parallel Queries

At 10:38 AM 11/26/96 GMT, Jeremy Russell wrote: >Is it true that PDQ, parallel queries in OnLine V7.x will use both >primary chunks and mirror chunks to retrieve data concurrently when >performing a query expected to return large volumes of data??? Jeremy - I may be wrong, but I believe that you get 'alternating' reads, regardless of PDQ or fragmentation. This is a plus for using Informix mirroring, however, I believe alot of the available LVM's also perform alternate read operations. I have found that the power/flexibility of using a LVM, far out-way what advantages you get from Informix mirroring. Jon ----------------------------------------------------------------------- Jon C. Vemo jon@etcscan.com Database Administration jvemo@cyberspace.com SCAN/Deluxe Payment Protection Systems, Inc. -----------------------------------------------------------------------