[j-nsp] Qfabric

[Keegan Holley]

I would have taken that as an excuse to use NFS.  I've never done such
testing but 30% is horrendous.


On Thu, Feb 24, 2011 at 1:00 PM, Jensen Tyler <JTyler at fiberutilities.com>wrote:

> In my tests I have seen as much as a 30% drop in Windows file sharing
> performance with 2 ms of latency vs <1ms. This was in a large radiology
> application. Applications like FTP work without any issues. Some
> applications are more sensitive(SMB). Low latency to me is measure in
> microseconds not milliseconds(mostly layer 2).
>
> -----Original Message-----
> From: juniper-nsp-bounces at puck.nether.net [mailto:
> juniper-nsp-bounces at puck.nether.net] On Behalf Of Jeff Cadwallader
> Sent: Thursday, February 24, 2011 11:31 AM
> To: Doug Hanks
> Cc: Juniper-Nsp List
> Subject: Re: [j-nsp] Qfabric
>
> I deal with a lot of those issues also and usually when I ask what do they
> mean by low latency the response comes back with sub-25ms. My data center
> is
> all 1-2ms max on an aging platform.
>
> The other question I have is what happens to that entire logical device
> when
> it fails in spectacular ways.
>
> I also agree that a sub-ms approach is needed in certain areas, however a
> tiered approach has its advantages also.
>
> We are looking and evaluating replacing our aging platform in the data
> center and will be following this closely.
>
> Jeff Cadwallader
>
> On Thu, Feb 24, 2011 at 11:15 AM, Doug Hanks <dhanks at juniper.net> wrote:
>
> > A lot of our customers require low latency:  financial, higher education,
> > HPC environments and utility.
> >
> > Juniper has taken the time to solve more than just the low latency
> problem.
> >  We're trying to solve larger problems such as how do you manage an
> entire
> > campus or data center as one logical device; that's able to scale; and
> > delivers performance and low latency.
> >
> > Doug
> >
> >
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