Re: async-io and freebsd

On Thu, Nov 11, 1999 at 09:39:03AM -1000, Clifton Royston wrote:
> On Thu, Nov 11, 1999 at 01:15:36PM -0500, Christopher Stein wrote:
> >
> > Hello Jeff,
> >
> > If you wish to use async-io, be prepared to newfs your entire
> > partition to do recovery. fsck is no longer guaranteed to work
> > to recover your cache.
>
> I think you're confusing the *BSD async file system options (for
> which your comments are correct) with the Squid configure --async-io
> option he was asking about. I believe they're unrelated.
>
> > On Thu, 11 Nov 1999, Jeff Beley wrote:
> >
> > > Does async-io work under FreeBSD, if so how do I get it to work?
>
> async-io requires threads, and I don't believe FreeBSD has thread
> support. (If it does, all the FreeBSD partisans will correct me, so
> you'll get your answer.)

    Partisans? ;-)

    AIO is supported since FreeBSD 3.0.
    
    As I understand it, threads are not necessary for AIO. Linux
    happens to implement AIO by using extra threads, because
    there is no AIO support in kernel land.
    

-- 
          Regards,
                            Sascha Schumann
                                 Consultant