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Re: Questions about XFS

To: xfs@xxxxxxxxxxx
Subject: Re: Questions about XFS
From: Stan Hoeppner <stan@xxxxxxxxxxxxxxxxx>
Date: Sat, 26 Oct 2013 05:41:25 -0500
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References: <CAD+1EGPG1G9Q8kwaSUjxVjvx73UByLb3G0rmUbgJr+zD-CnjEw@xxxxxxxxxxxxxx> <20131025164255.46d2829c@xxxxxxxxxxxxxxxxxxxx> <526A86F2.9070400@xxxxxxxxxxx>
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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"?  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.


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