On 7/14/2013 11:14 AM, Eric Sandeen wrote:
> I guess?
> That's quite a procedure! And I have to say, a slightly strange one at first
> It'd be nice if they said what they were trying to accomplish rather than
> just giving you a long recipe.
> In the end, I think they are trying to create 128AGs and maybe work around
> some mkfs corner case or other.
Or it's just as likely they are laying out these image frames in a
specific manner across 128 directories, assuming 128 AGs exist, to
achieve some specific "on disk" organization of the files. It's simply
not possible to know without more information.
Interestingly, on a 14+2 RAID6 array of 7.2K drives, normally 128 AGs
will decrease parallel performance due to a huge increase in head seek
latency. Thus I'd assume this isn't a parallel workload. Either that
or Autodesk doesn't know XFS as well as they believe.