Collection of useful, relevant or inane places on the the Internets for 22 May 11:
- ntop » Packet Capture Performance at 10 Gbit: PF_RING vs TNAPI – Astonishing:
We tested PF_RING vs TNAPI on a low-end server equipped with an entry-level Xeon processor, so that we can test the minimum packet capture performance you can expect. The test result is shown below and it basically says that:
With packets of 512 bytes or more, TNAPI and PF_RING-over-NAPI show a similar performance, and they can operate at wire rate as they capture all available packets.
10Gbps packet capture at wire speed for normal packet mix on an entry level Xeon. That kernel mode network driver for Windows was sure painful to get working and stable but maybe we are seeing the benefits.
- How OpenFlow is changing networking and XenServer » ocb – Citrix Community –
We actually already had a conversation 2 weeks ago about our DVS solution in XenServer and our plans for the future. The reason for this conversation was really so he could be optimally prepared for Interop where Citrix would be part of the InteropNet OpenFlow Lab. Tim also took care of creating a demo environment showing off our DVS implementation, something he had to do anyway for our XenServer DVS presentation at Synergy 2011 in San Francisco.
- Using Perl to connect to remote Cisco devices | Initial Draft – CCIE Blog – Love PERL, wish I had more time to be able to master it. And programming in general.
Perl, is well known for his amazing library (http://search.cpan.org), I used NET::Telnet for this, but it’s up to you to use anything else; Perl motto: TMTOWTDI (pronounced: Tim Toady) “There’s more than one way to do it“.
- Fulcrum Microsystems – Scaling the Cloud – Check these chipsets from Fulcrum Micro. Glue to a board and you have an instant 10G/40G switch with kickass performance.
The FocalPoint FM6000 series is a family of fully-integrated wire-speed 10G Ethernet switch chips that include enhanced features specifically for the modern data center such as low latency, high scalability, L3 routing, Priority Flow Control (PFC), Enhanced Transmission Selection (ETS), Quantized Congestion Notification (QCN), and FCoE, along with support for interconnect topologies such as TRILL and SPB, as well as emerging virtualized networking standards such as 802.1bg (Edge Virtual Bridging) and 802.1bh (Port Extenders). In addition to enhanced functionality, the FM6000 series contains up to 72 10G Ethernet ports and the ability to group ports as 40G MLD interfaces. All of this is accomplished while maintaining the best-in-class latency and throughput demonstrated by the FM2000, FM3000 and FM4000 families of the FocalPoint product line.
- Taking the Advantages of One Junos to the Cloud – J-Net Community – Juniper announces Junosphere – a cloud based terminal emulator for education institutions. Nothing for customers.Disappointed after much pre-release hype. Are customers not important ?
- A quick Office hint, and a request – Mac OS X Hints – I need to restart Word every two hours for it to keep working.
The bug, in itself, is insignificant: the first version of MS Office for the Mac had a limit on the number of documents it could handle without quitting, but the problem was that each save counted as a new document, so Office apps would lock up pretty quick.
The same thing seems to be happening now with the newest version of everything involved.
The hint to get rid of the MS Office apps no longer saving is to quit them often, then re-launch as needed. Yes, it’s a bit simple-minded, but sometimes that’s what you need to do.
- Coding Relic: Just Weld It to the Rack – Chassis based switches are a “lock in” technology. Worth remembering.
There is a mantra amongst network equipment vendors: never let the customer unscrew the chassis from the rack. Replace every component with upgraded equipment, but never upgrade the chassis itself. Doing so often triggers the customer to send the whole thing out for bid to multiple vendors, and you might not win. Somebody else’s chassis might get slotted into the hole you left.
- Wading through the FCoE and data center network fabric hype – Great article on FCoE for storage networks and lack of vendor support. But this quote is a classic.
“FCoE reminds me a lot of Token Ring over ISL,” said Doug Gourlay, vice president of marketing at Arista Networks. “It’s taking one closed system and shoving it into an Ethernet frame, transporting it to its destination and transferring it back into a closed system on the other end. I see much larger growth in global file systems, NFS, NAS and iSCSI. I worry when I see a lot of vendors chasing what Cisco did on FCoE.”
Agree, Cisco (and its partners such as Emulex/QLogic/EMC) is still the only vendor committing large scale resources to FCoE.
Also, what about FCoTR ? No love for the Token Ring ?
Citrix was one of the companies demonstrating their OpenFlow support at Interop. Consider OpenFlow can configure the virtual switches on Citrix as well the physical switches in your network and you will have a new view on why I’m thinking that OpenFlow can cross the adoption gap.