[GENERAL] create trigger : functions

Hi, I have written a 'C' function to be called during INSERT trigger on a table. Are there any restrictions on the functions that can be called? I know you can call SPI_* functions. But, can I call PQ* functions ? e.g PQsetdb. Is there any document which describes how the

[HACKERS] redundancy and disk i/o

Hi, I have two questions 1. Is it possible to set up a set of redundant disks for a database? one of them being remote from the database? 2. If I want to use my i/o routines for disk i/o, is it possible? does postgres support such APIs? thanks, Sandeep