Re: general speed differences between 4.1.1-RELEASE and 4.3-RELEASE

[Shannon Hendrix]

On Thu, May 24, 2001 at 11:19:44PM -0700, Doug Barton wrote:

>       The current mood (which I agree with) is to make softupdates the default
> after installation. The problem with the combo of write caching and
> softupdates is that if the power actually goes off the meta-data writes
> that softupdates postpones and are further postponed by the write cache
> will never happen, therefore leaving the file system in a potentially
> unrecoverable state. 

If drives could be counted on to have a synchronous write command, and
the driver interface let you send a flag (cache/no-cache) with each
write, would that be acceptable?

In the XFS miling list at SGI, some were saying that that is what they
wanted for metadata and log writes.

-- 
"Whatever..." -- Kenny Gatdula

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