SUMMARY: UFS direct I/O

[DAUBIGNE Sebastien - BOR ( SDaubigne@bordeaux-bersol.sema.slb.com )]

Thanks to Cyril Plisko, Casper Dik, Kevin Buterbaugh, Jagannath
Gopalakrishnan.

UFS doesn't provide a public ioctl() interface for per-file Direct I/O, as
VxFS does.
Though, it provides a library function that issue the private ioctl call :
directio()   (man directio)

Note that activating directio on an opened file will affect all other
processes accessing this file.

---
Sebastien DAUBIGNE
sdaubigne at bordeaux-bersol.sema.slb.com
<mailto:sdaubigne at bordeaux-bersol.sema.slb.com>  - (+33)5.57.26.56.36
SchlumbergerSema - SGS/DWH/Pessac

	-----Message d'origine-----
	De:	DAUBIGNE Sebastien  - BOR (
SDaubigne at bordeaux-bersol.sema.slb.com )
[SMTP:SDaubigne at bordeaux-bersol.sema.slb.com]
	Date:	mercredi 19 mars 2003 15:09
	@:	sunmanagers at sunmanagers.org;
'veritas-vx at mailman.eng.auburn.edu'
	Objet:	UFS direct I/O

	Is there any method to activate UFS direct I/O on a per-file basis
(not on
	per-filesystem basis with the forcedirectio option)..
	I know VxFS has an ioctl call for this (VX_DIRECT), but I didn't
find the
	equivalent UFS option.
	I will summarise.

	---
	Sebastien DAUBIGNE
	sdaubigne at bordeaux-bersol.sema.slb.com
	<mailto:sdaubigne at bordeaux-bersol.sema.slb.com>  -
(+33)5.57.26.56.36
	SchlumbergerSema - SGS/DWH/Pessac
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