NFSv3, ZFS, 10GE performance

[Fabian Keil]

Bob Friesenhahn <bfriesen at simple.dallas.tx.us> wrote:

> On Mon, 26 Mar 2012, Sven Brandenburg wrote:
> >
> > Hopefully, readahead doesn't kill performance for smaller files.. :-)
> 
> You are right to be concerned.  There are plenty of cases where 
> read-ahead damages application performance.  Reading data which is 
> never actually used is expensive.
> 
> It would be useful if FreeBSD would support posix_fadvise() so that 
> applications can specify the type of access they will use, and if this 
> advice can be used by NFS and the filesystem layer to decide if 
> read-ahead should be used, and how much.

posix_fadvise() is already available in FreeBSD 10.0-CURRENT.

Fabian
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 196 bytes
Desc: not available
Url : http://lists.freebsd.org/pipermail/freebsd-fs/attachments/20120326/ab8161d6/signature.pgp