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<div>Hi Mark,</div>
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<div>On 8 May 2014, at 7:39 pm, Mark Anthony Delfin <<a href="mailto:mark@delfin.me">mark@delfin.me</a>> wrote:</div>
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<div dir="ltr">Hi Everyone,
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<div>I have Juniper SRX650 cluster which I want to send Flow data. Average traffic on internet-facing interface is 50 mbps but peaks at 250mbps. Average CPU utilization is 28% (15% user + 13% Kernel). What will you guys recommend for the sampling rate?</div>
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<div>Thank you.</div>
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<div>Mark</div>
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<div>This document is worth a read:
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<div><a href="http://www.juniper.net/us/en/local/pdf/app-notes/3500204-en.pdf">http://www.juniper.net/us/en/local/pdf/app-notes/3500204-en.pdf</a></div>
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<div>It only has figures for an SRX240, but at 64 and 1500 KB packet sizes (worst and best performance respectively). </div>
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<div>If you add a scaling factor of 4x as per almost every other measurement on the data sheet between the 240 and the 650, you probably have a good place to start for the *maximum* throughput at the various sampling ratios.</div>
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<div>There is no need for any extra hardware on the branch platforms for J-FLow, as this is all handled in software on the RE.</div>
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Cheers,<br>
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Ben<br>
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