Date: Wed, 20 Apr 2016 09:13:51 -0600 From: Warner Losh <imp@bsdimp.com> To: Johan Hendriks <joh.hendriks@gmail.com> Cc: FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: Heads up Message-ID: <CANCZdfp0mK204WnZ%2B41qAGnOSCpa2tZFR-sYw0rU2DMJMZVJ4w@mail.gmail.com> In-Reply-To: <0f6a84a9-4bae-4dc1-4f6e-169c16232cf6@gmail.com> References: <CANCZdfpnYnVrvhNagYUT9RhAuC1AMCrxh=GCt8RKT0bqxuJybw@mail.gmail.com> <CAH7qZftspY=i5MaQ6sNg5L5XXBN7gfCuAMO-NZt=7Qp5zo6u_w@mail.gmail.com> <CAG6CVpXKZJFi7f=uxoXbc-MoHwd6JqZMwh-6m%2BGZvJ9JT95ZOA@mail.gmail.com> <CAH7qZfuA56CxMo9B6-1%2B7hhvugGiAMJG0_O3qW57chesSA_1Kw@mail.gmail.com> <CANCZdfpKmk4%2BmS-xNN0cdCyOb=GN2P5%2BESZpOWwJCTZPkWpm8w@mail.gmail.com> <0f6a84a9-4bae-4dc1-4f6e-169c16232cf6@gmail.com>
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On Wed, Apr 20, 2016 at 1:10 AM, Johan Hendriks <joh.hendriks@gmail.com> wrote: > Op 15/04/16 om 19:30 schreef Warner Losh: > > > Also a horrible name. It's a generic I/O scheduler. It can do lots of > > things. I keep saying that, and categorically refuse to name the more > > expansive scheduler anything that's so limiting. > > > > Warner > Thanks for all the work on this. > > One question? > > If the scheduler can do a lot of things what are the defaults set to? > Are they set to the Netflix load or more like the behauvier of a > standard FreeBSD before this patch. > Mostly neutral. You have to turn on the different steering engines. However, it does favor reads over writes, which may be a problem for write intensive work loads. Warner
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