Re: O_DIRECT please; Sybase 12.5

Steve Lord
2001-06-29T15:23:05Z

XFS supports O_DIRECT on linux, has done for a while.

Steve

> At work I had to sit through a meeting where I heard
> the boss say "If Linux makes Sybase go through the page cache on
> reads, maybe we'll just have to switch to Solaris. That's
> a serious performance problem."
> All I could say was "I expect Linux will support O_DIRECT
> soon, and Sybase will support that within a year."
>
> Er, so did I promise too much? Andrea mentioned O_DIRECT recently
> ( http://marc.theaimsgroup.com/?l=linux-kernel&m=99253913516599&w=2,
> http://lwn.net/2001/0510/bigpage.php3 )
> Is it supported yet in 2.4, or is this a 2.5 thing?
>
> And what are the chances Sybase will support that flag any time
> soon? I just read on news://forums.sybase.com/sybase.public.ase.linux
> that Sybase ASE 12.5 was released today, and a 60 day eval is downloadable
> for NT and Linux. I'm downloading now; it's a biggie.
>
> It supports raw partitions, which is good; that might satisfy my
> boss (although the administration will be a pain, and I'm not
> sure whether it's really supported by Dell RAID devices).
> I'd prefer O_DIRECT :-(
>
> Hope somebody can give me encouraging news.
>
> Thanks,
> Dan
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