Re: Is user-space AIO dead?

[David Lloyd <dmlloyd@tds.net>]

On Wed, 11 Jan 2006, Kenny Simpson wrote:

> --- David Lloyd <dmlloyd@tds.net> wrote:
> > Wouldn't nonblocking I/O on regular files be nice?
> Yes it could be.  As I understand it, regular file writes (not O_DIRECT) 
> are only to the page cache and only block when there is memory pressure 
> (so it is more of a throttle).
If you were however using O_DIRECT or O_SYNC, you would then have a 
mechanism to know when your writes have made it to disk, which might be 
useful for transactional systems.
- D
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