Subject: Re: Raising NFS parameters for higher bandwith or "long fat pipe"
To: None <firstname.lastname@example.org>
From: YAMAMOTO Takashi <email@example.com>
Date: 12/14/2003 11:00:58
> >> Below is an untested, almost certinaly broken, patch showing how
> >> FreeBSD 4.x does NFS readahead. It' basically two chunks:
> >yes, i agree it's broken. :-)
> >we're not using traditional buffer cache interfaces for VREG's pages.
> So how can we make it non-broken?
do readahead at upper layer (as we're doing now, or even more upper layer.)
maybe put some contexts into files/map entries, and use them to
determine how many pages to fetch?
> Or is adding more readahead
> here just not going to help an app doing dd= ... ?
i think it's worth to try to tweak genfs_rapages/genfs_racount.