Why does the Napatech card enable writing to one partition? isn't the writing throughput still limited?
Tory
Sent: Thursday, July 31, 2014 at 11:18 AM
From: "Luca Deri" <[email protected]>
To: [email protected]
Subject: Re: [Ntop-misc] Mac Pro and n2disk
From: "Luca Deri" <[email protected]>
To: [email protected]
Subject: Re: [Ntop-misc] Mac Pro and n2disk
Tory,
we have recorders that do 20G to disk, If you use Intel NICs you need to use 2 n2disk instances that write to 2 partitions (hence youi need two controllers). With Napatech cards you can save everything onto the same partition. Note that in the first case, our extraction tools merge the two ports packets, whereas on the second case a dumped pcap is already "ready to use". For 10G you need at least 8x10K RPM SATA drives (10 are better).
Luca
On 07/31/2014 09:35 AM, Tory Backalbat wrote:
we have recorders that do 20G to disk, If you use Intel NICs you need to use 2 n2disk instances that write to 2 partitions (hence youi need two controllers). With Napatech cards you can save everything onto the same partition. Note that in the first case, our extraction tools merge the two ports packets, whereas on the second case a dumped pcap is already "ready to use". For 10G you need at least 8x10K RPM SATA drives (10 are better).
Luca
On 07/31/2014 09:35 AM, Tory Backalbat wrote:
HiThanks Luca for your answer, I think I'll go on the direction of a rack mounted server.So if I want to create a wire-rate recording server with n2disk for 2X10 Gbps, do you think one raid controller would be enough, or should I use 2 seperate controllers?Is there a risk of an I/O bottleneck?Regards,TorySent: Monday, July 28, 2014 at 7:30 PM
From: "Luca Deri" <[email protected]>
To: "[email protected]" <[email protected]>
Subject: Re: [Ntop-misc] Mac Pro and n2diskHi ToryN2disk works on OSX but for 10g you need to use Linux. We know people who have tried thunderbolt and the outcome is that the performance is suboptimal (I have seen a report during the sharkfest conference) so I think OSX is not yet a viable alternative to Linux both in performance and priceRegards Luca
Sent from my iPhone (sorry for typos)Hi guys,I'm trying to assemble a multi-gigabit packet capture machine that is both portable and able to capture traffic of up to 2X10 Gbps.The requirement of portability (small and light) is essential and so the natural choice is the mac pro with it's high performance and small size, using a PCIe cage with thunderbolt and intel's 10 Gbps NIC.Also - wanting to be able to capture highspeed capture I'm aiming at using pf_ring, dna and n2disk. To do that I'll need to run ubuntu/centos natively on the Mac pro.Does anyone have any experience with that kind of setup or with running pf_ring on an apple machine?To the ntop team- do you have experience with using pf_ring, dna on a NIC through a thunderbolt interface? and- has pf_ring been tested on apple devices?Is that theortically possible?Thanks in advance,Tory_______________________________________________ Ntop-misc mailing list [email protected] http://listgateway.unipi.it/mailman/listinfo/ntop-misc_______________________________________________
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