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Re: Questions about XFS

To: stan@xxxxxxxxxxxxxxxxx, xfs@xxxxxxxxxxx
Subject: Re: Questions about XFS
From: Eric Sandeen <sandeen@xxxxxxxxxxx>
Date: Sat, 26 Oct 2013 22:29:06 -0500
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <526B9C55.9000707@xxxxxxxxxxxxxxxxx>
References: <CAD+1EGPG1G9Q8kwaSUjxVjvx73UByLb3G0rmUbgJr+zD-CnjEw@xxxxxxxxxxxxxx> <20131025164255.46d2829c@xxxxxxxxxxxxxxxxxxxx> <526A86F2.9070400@xxxxxxxxxxx> <526B9C55.9000707@xxxxxxxxxxxxxxxxx>
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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

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