Re: [fuse-devel] write size stuck at 32k?

[JT O. <jt...@xn...>]

On Fri, Jun 1, 2012 at 1:05 AM, JT Olds <jt...@xn...> wrote:
> Hey everyone,
>
>  First off, this is one of the most helpful mailing lists I've been on
> recently, so I just wanted to say thanks to all of you.
>
> A quick question about write sizes: I'm on Linux 3.2.0 with FUSE
> 2.8.6, using the low-level API. I am using FUSE_USE_VERSION 26. I've
> tried every possible combination of enabling direct_io when a file is
> opened, and providing big_writes as a mount option. No matter what I
> do, write requests clock in at 32K every time. I've actually gotten
> performance to a pretty good place, but I'm a little confused why I
> can't seem to tweak this value.
>
> What might I be doing wrong? I also have max_read and max_write set at 128K.
>
> -JT


Uh, I also tried
  conn->want |= FUSE_CAP_BIG_WRITES;
on init, but I'm neither sure that did anything or I'm even doing that right.