Messages in this thread | | | Date | Mon, 21 Dec 1998 07:12:48 -0700 | From | yodaiken@chelm ... | Subject | Re: Should raw I/O be added to the kernel? |
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On Sun, Dec 20, 1998 at 10:56:48PM -0800, Ronald Cole wrote: > Linus Torvalds <torvalds@transmeta.com> writes: > >The only argument for raw disk IO is the caching policy issue > > Exactly right. Without raw disk IO, you couldn't guarantee a database > to always be in a consistent state on the disk (i.e. it isn't very > desirable to have a committed transaction in a cache when the pc loses > power). It makes it impossible to recover the database. And what
So you better not use any drive or controller that does any buffering or reordering. Don't confuse mechanism and policy.
--------------------------------- Victor Yodaiken Department of Computer Science New Mexico Institute of Mining and Technology Socorro NM 87801 Homepage http://www.cs.nmt.edu/~yodaiken PowerPC Linux page http://linuxppc.cs.nmt.edu Real-Time Page http://rtlinux.org
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