Re: Questions about XFS

Eric Sandeen
2013-10-27T03:29:12Z

On 10/26/13 5:41 AM, Stan Hoeppner wrote:
> On 10/25/2013 9:57 AM, Eric Sandeen wrote:
>
>> allocator, but it doesn't have GRIO (Guaranteed Realtime I/O) like
>> IRIX does.
>
> Wasn't it called "Guaranteed-Rate I/O"?

Yeah, you are right. Brain fart.

> And required the Origin ccNUMA
> hardware including the HUB and XBow ASICs? IIRC this had no real-time
> guarantee, but simply reserved X amount of bandwidth from the XBow
> through the HUB to the processor, and finally the kernel and process.
> Whether the attached disks could sustain the reserved bandwidth was
> another matter.

There were 2 versions, implemented in very different ways...

Anyway, if Harry would "prefer designing and implementing" it for Linux,
I'll just let him get started. :)

-Eric