Re: AIO vp...

In article <35FD5009.2B91@bloomberg.net>, Art S. Kagel <kagel@bloomberg.net> writes >Arun Shastry 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. >> > >> >> IDS uses kernel AIO only on raw devices ONLY if the OS supports it. >> All I/O on cooked files is via AIO VP's. > >Actually some ports without kernel asynch I/O support (notably the >DG/UX port for one) implement KAIO using the KAIO thread directly >anyway. > I wish DG/U would hurry up and implement KAIO in the kernel, even SCO has it with the suds package...then we could benchmark it for your setup (better it's faster.. :->>>). >Art S. Kagel -- David Williams Maintainer of the Informix FAQ Primary site (Beta Version) http://www.smooth1.demon.co.uk Official site http://www.iiug.org/techinfo/faq/faq_top.html I see you standin', Standin' on your own, It's such a lonely place for you, For you to be If you need a shoulder, Or if you need a friend, I'll be here standing, Until the bitter end... So don't chastise me Or think I, I mean you harm... All I ever wanted Was for you To know that I care