Re: Raw vs. cooked

From: Ronald Cole <ronald@forte-intl.com> > >"Obnoxio The Clown" <obnoxio@hotmail.com> writes: > > Jeez, imagine that, a Sun sales engineer who believes that their >filesystem > > is faster than raw IO. > >Linux has no raw block devices. The prevailing wisdom is that O_SYNC >is good enough. Of course, this means that for crash recovery, you >must use a filesystem that supports O_SYNC, like ext2fs. Does the >Informix Linux port use O_SYNC like the Oracle Linux port does? I >don't know. Jeez, I must have had a rough night last night. Last time I looked, Scott MacNeally (sp?) wasn't even supporting Linux on Sun, now it's the official OS of Sun. :-p Oh, it was just a bad segue... :-) If my rather aged memory serves correctly, Informix does use the O_SYNC flag. There was certainly some discussion of it of late... >One can always make a cooked device smoke a raw device by stirring in >liberal amounts of cache policy. However, I suspect that database >consistency and crash recovery aren't high on the list of benchmark >priorities. You're kidding, aren't you? You're not seriously implying that someone would actually have the termerity to cook a benchmark? (if you'll forgive the pun! :-) I really shouldn't post after drinking so much, forgive me. ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com