Re: Setup of disk chunks for online under AIX 4.1.3

In article <44vtmo$75q@foible.pix.za> bw000001@pixie.co.za writes: >stu@ham.medlab.co.nz (Stewart Hague) wrote: > >>I know that buy the manual, Informix recommends using raw disk for it's disk >>chunks under online, but our supplier has said that it should be configured >>using "cooked" files. > >>They argue that the AIX operating system is reliable enough to protect the >>disk updates, and the use of "cooked" files makes the set up and mamagment >>much easier. > >Yes, but using cooked files can cause a serious performance >bottleneck. Also, using cooked files means that Informix cannot >guarantee the integrity of the data. I would *seriously* not advise >the use of cooked file - they sound like they're just to lazy to >figure out how to do it! :) > >>I was wondering if anyone had any facts/experiances with this. This is not completely true. Informix OnLine can guarantee the integrity of the data when using cooked files on operating systems which support the O_SYNC flag to open(2). See also write(2). Most (all?) modern unix operating systems do. Scott