On Sun, Feb 02, 2014 at 11:09:11AM -0700, Chris Murphy wrote:
> On Feb 1, 2014, at 2:44 PM, Stan Hoeppner <stan@xxxxxxxxxxxxxxxxx>
> wrote:
> > On 2/1/2014 2:55 PM, Chris Murphy wrote:
> >> On Feb 1, 2014, at 11:47 AM, Stan Hoeppner
> >> <stan@xxxxxxxxxxxxxxxxx> wrote:
> > When nesting stripes, the chunk size of the outer stripe is
> > -always- equal to the stripe width of each inner striped array,
> > as I clearly demonstrated earlier:
>
> Except when it's hardware raid6, and software raid0, and the user
> doesn't know they need to specify the chunk size in this manner.
> And instead they use the mdadm default. What you're saying makes
> complete sense, but I don't think this is widespread knowledge or
> well documented anywhere that regular end users would know this by
> and large.
And that is why this is a perfect example of what I'd like to see
people writing documentation for.
http://oss.sgi.com/archives/xfs/2013-12/msg00588.html
This is not the first time we've had this nested RAID discussion,
nor will it be the last. However, being able to point ot a web page
or or documentation makes it a whole lot easier.....
Stan - any chance you might be able to spare an hour a week to write
something about optimal RAID storage configuration for XFS?
Cheers,
Dave.
--
Dave Chinner
david@xxxxxxxxxxxxx
|