Re: Was able to reproduce "cp: cannot stat file.x: Input/output error"

[Alex Zarochentsev <zam@namesys.com>]

On Tue, Aug 10, 2004 at 04:06:24PM -0500, David Dabbs wrote:
> 
> 
> > 
> > On Tue, Aug 10, 2004 at 03:40:14PM -0500, David Dabbs wrote:
> > >
> > > The solution I proposed is below, and I followed up that the wait should
> > be in the iteration command, but it should probably be moved _after_ all
> > reps as I have it below. This will sync/wait after all the phase
> > iterations have run instead of after each individual phase iteration
> > command. In either case it will not be timed. Sound right, Alex?
> > 
> > one "wait" should be at the old place still.
> > 
> [David Dabbs] 
> I thought so, then second guessed it.
> 
> > but, I don't think we should measure writes w/o final cleaning of the fs
> > cache.
> > 
> [David Dabbs] 
> If you mean at phase end, yes that does sound right for write ops.
> 
> 
> > 
> > Reiser4 had no support for write throttling at some early stages of
> > development, w/o final sync() it might look faster than physical disk
> > drive.
> > 
> > > dd
> > >
> 
> I have been running benchmarks with SYNC=off, as the mongo page recommends
> against doing so. In configs where SYNC=ON we would omit the syncs/wais,
> yes?

not sure. metadata need to be synched still.

> David 

-- 
Alex.