Category Archives: SAN / WAN - Page 2

Software-Defined Data Center Symposium 2014

SDDC 2014

Tech Field Day plans SDDC Symposium

Being part of the SFD5 gang I was invited to join the Software-Defined Datacenter Symposium as well! This event will feature many key figures from the industry and end-user community, and will include discussions of OpenFlow, software-defined networking (SDN), software-defined storage, converged infrastructure, and the greater software-defined future!

Note that the event capacity is severely constrained. Therefore, the SDDC Symposium is focusing on end-user implementors and encouraging others to participate online by viewing the live video stream on this page!

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Will the new WiFi super antenna change the world?

A Dutch invention will change the WiFi world drastically

At least, that’s what Roel Pieper and Marcel Boekhoorn are convinced of. The revolutionary super antenna should cause all problems concerning the reach of indoor WiFi signals to disappear. Furthermore this new product is supposed to make an end to wireless antennas interfering with each other’s frequencies and smartphones will get a better reception because of this new invention. The new antenna should be better and more advanced than anything else currently known to mankind. On average a smart phone needs about seven different antennas, but with the new invention only a single one is needed. And on top of this using the new antenna more data can be sent and received compared to the existing ones.

Mathematical super-formula

Boekhoorn and Pieper worked together in a company called “Antenna Company”, which will produce these next-gen antennas. The technique is based on a mathematical super-formula made up by Professor Gielis and it’s called the “Super-formula“.

Roel Pieper is appointed as the CEO of the “Antenna Company” and they’re already talking to various multinationals about applying the antenna in cell phones, cars and routers according to the Dutch newspaper “de Telegraaf”. Other applications could be airplanes, medical equipment, weaponry and radar systems, but other equipment that needs to communicate with other equipment, such as central heating thermostats.

World hit

Antenna Company “promises to be my most successful company ever”, according to Boekhoorn in an exclusive interview by Quote. The 3D-optimized antenna can potentially make billions of Euros. “This super antenna will be a hit.” HTC, LG and Samsung are potential customers according to the billionaire. The Antenna Company is already talking to several of these multinationals. Even Cisco is supposedly interested.

High Tech Campus

Production of these super-antennas will start in March. The Antenna Company will settle at the High Tech Campus in Eindhoven in the Netherlands. The Head Quarters is formally located on Curacao. Exactly how much Boekhoorn has invested in the project, he’s unwilling to say..

 

Source: http://www.it-infra.nl/default.aspx?page=7364

Which Cisco NX-OS should I use?

This time a really short reminder-like post. Somehow I often end up trying to locate certain release notes of various equipment, but Cisco organized theirs for the SAN switches in an orderly manner: Release Notes

Every NX-OS version is listed here and in each all supported equipment is named. I found this to be very helpful.

Migrating hosts to new storage ports, LIVE

Migrating hosts to new storage ports, LIVE!

Many SAN administrators will face this challenge from time to time: certain hosts need to start using new storage ports. Reasons vary, but in the EMC Clariion/VNX world this might happen because it’s decided to dedicate the mirrorview ports to mirrorview only instead of allowing hosts to use these ports as well. Obviously having dedicated replication ports will improve replication performance and for synchronous replication this will also improve the production host performance since the write acknowledgement from the remote array will be quicker and the extra latency is limited to a minimum.
So you end up wanting to free the SPA1 and SPB1 ports (most Clarrions) or SPA0 and SPB0 (VNX). But disalowing hosts to use these ports means they will loose access to these paths. This just might be disruptive! Or not?

There’s a way to migrate nondisruptively!

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EMC SAN Copy best practices

SAN Copy zoningEMC SAN Copy best practices

  • Just like with MirrorView ports: don’t use SC ports as host front end ports. Try to use dedicated ports for SC
  • Make sure the zoning is correct between the source SAN Copy port and the target SAN Copy port
  • Don’t use zones with multiple storage array (initiator) ports in them. Try to use SIST whenever you can: Single Initiator, Single Target so you’re certain there can only be 1 initiator in each zone

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Fibre Channel Routing: EMC Ask the Expert on ECN

Fibre Channel Routing

From Monday April the 15th to May 1st 2013 EMC is hosting yet another “Ask the Expert” discussion on ECN. This time it’s about Fibre Channel Routing.

What is it, what’s it used for and how do you know if you want it?

Take a look at the discussion and join me and my friends Allen Ward and Mr Dynamox on ECN!

And although we close the topic on May 1st, we’ll wrap up LIVE from EMC World in Las Vegas in the EMC Elect corner! So if you’re there from May 6 to May 9, make sure to look out for us. As far as I know the Elect corner will be next to the Blogger’s area, close to the Pavillion.

The importance of keeping fibers clean

Fiber patch cables seem to be very forgiving, when light shines through everything is great and everybody’s happy, right? Wrong!!!
You shouldn’t underestimate the importance of keeping the ends of patch cables and the SFPs clean, since the actual diameter of a fiber is either 9 or 50 (or even 62.5) mu (micron).

fiber

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Discussing the challenges of Long Distance Links

On ECN (EMC Community Network) together with Jon Klaus, a colleague of mine, I started a new “Ask the Expert” discussion about long distance links and the challenges you might be facing there. I would like to invite you to join the discussion there:

https://community.emc.com/message/690945

If you’d like to discuss anything here, you’re welcome to do so on ECN, but if you also like Twitter there’s a treat for you as we will be having a LIVE “TweetChat” on Monday November the 26th from 19:00-21:00 CET (1PM-3PM EST, 10AM-12AM PST). The URL you can use to filter out the discussion will be http://tweetchat.com/room/EMCATE.
An earlier anouncements about the TweetChat on Thursday the 22nd proved to be badly chosen because of Thanksgiving, a national holiday in the USA. We didn’t see this coming. Our appologies. I will be online on Thursday the 22nd anyway to welcome anyone who didn’t see the new anouncement.

Let’s join the discussion!