Re: mount options when using direct i/o?

Hi,

You can try this:
http://www.sun.com/blueprints/1003/817-3835.pdf

from my experience (Sun V880 Solaris 9) it makes a lot of difference if you are working on internal drives. If I use some storage array it makes things only worse.

As you will see from the paper mentioned erlier it is advisable to use forcedirect only if the primary user of partition if oracle database. Otherwise for operations like tar, cration of files etc. it makes thing mouch worse - since those operations are not buffered.

Good Luck
Remigiusz Boguszewicz
championsleeper wrote:
> hi,
>
> we're benchmarking the database of our application and are looking at
> direct i/o versus buffered i/o. From what I've read the parameter
> filesystemio_options is important - as are the parameters in mount
> options for the filesystem. can anyone point me towards a
> reference/document that discusses the relative merits of this feature
> and provides some information on a unix o/s variant basis regarding
> what can and cannot be done or set ?
Received on Tue Nov 09 2004 - 03:16:22 CST