Re: AIO vp...

Posted in 1998

Stefan Weideneder — Tue, 15 Sep 1998 07:44:40 +0100 — source: Informix-list mailing list archive (1991-1998)

Art S. Kagel wrote: > > SUNIL S. SINGH wrote: > > > > Hi all !!! > > > > I have a little doubt here abt AIO vp. > > One of the informix manual says tht IDS uses kernel AIO (kio) I/o method, > > ie performing I/O through operating system, if chunk is UNIX raw device > > and it relies on AIO vp for performing I/O directly if chunk is UNIX > > cooked file. > > > > How far is it correct ?? > > I think it is other way round. > > No that is correct. By default, on most platforms, RAW device chunks > are handled by KAIO threads and COOKED device/file chunks are handled > by AIO VPs. > > Art S. Kagel ... on most platforms, except some platforms, i.e. HP-UX. Bye Stefan Weideneder