VPLEX is quite a unique beast in that there are numerous failure opportunities (as I like to call them) a host can walk away from unscathed. There are also some it cannot. I have gotten this question a lot lately and sometimes to the bewilderment of the intended receiver. As magical as VPLEX is, in a lot of cases failover is not automated which implies why VMware SRM integration is in the not so distant future. Below I have gathered information from a few sources that speak on the topic so just maybe we can all get it straight in our head.
To preface that, I wanted to mention two types of volumes from a VPLEX Metro configuration, they are Distributed Virtual Device/Volumes and a Virtual Volumes with remote access. The two are very different. DVV’s as we’ll call them have two copies of the data, one leg at each site. The VV is only one copy of the data, at Site A or Site B, the remote access allows you to make visible that data to hosts at the opposite location to where the data lives. Meaning if you have a VV at Site A you can enable remote access so hosts at Site B can access that VV over the VPLEX transport. In this scenario, you could lose an entire array at Site B and still maintain host uptime because the data is being served up from Site A.
With DVV’s, hosts are actually accessing their local leg for data access, but its done at the head level for the DVV. Considering the two volumes that make up the DVV are mirrored and identical, you could lose either volume, one or the other, not both, and still maintain host connectivity. Where it gets squirrelly is at the loss of VPLEX itself. In single engine scenarios your SPoF is now that single engine. Yes there are two directors within each engine, but loss of a single engine would most likely cause data unavailability depending on what site it failed at. There are a few ways around that. As I mentioned earlier by zoning all hosts at Site A to Site B’s mirror leg and providing standby pathing access, you could survive the loss of a Site A VPLEX engine. Models like such get incredibly complex, especially from a zoning perspective, so be careful out there.
Consider the loss of each from the hosts POV, if there are other scenarios you would like clarification on let me know…
On Saturday I made my way to the first TEDx event in the Wilmington area, dub as TEDxHampstead. Hampstead is a small community north of Wilmington, to which a few of the cofounders and board members live. TEDxWilmington happened to be taken (damn you Delaware), hence the name. What has always grabbed me about the TED(x) movement is the notion of life long learning. Its part of the human makeup. Being highly social and curious creatures, we have a thirst for knowledge. This thirst has no age limit, although you’ll see below, perhaps the younger generation needs a little push…
The general flow of the event was as follows below. There are number of guidelines the charter has to adhere to to be legit. I imagine this will be the same format in your area if you attend.
The speakers themselves were very diverse which added to the appeal and interest. From a Communications Professor at UNCW to one of the cofounders of the Full Belly Project, all had a message and their experiences to bring. The audience, frankly, was sparse. Filled mostly with geriatrics, distinguished suits, a smattering of College ed’s and me (I certainly didn’t hit the crowd demographic) Maybe 30 to 40 with crew and speakers. After each speaker there was Q&A which rounded out each speech to around 20 to 25 minutes a piece.
Formality’s aside, what brought me there was the speaker David Pell. I somehow stumbled upon his communal contributions, of which he humbly calls a Taste of Guitar, a few months ago. Which in turn led me to TEDx. His vision is to create a forum for young musicians to showcase their talents. Beginning and advanced musicians must audition to perform, preferably solo, with several songs premiered. This free event brought together elder musicians in the area who provided sound equipment and mentorship. Also as part of the event was a guest artist, usually someone of stature and relevance in the music industry, who would play and teach.
So I guess at this point you are trying to make sense of the Subject of this post, “1+1 can be”. Pell’s speech was called “Being Creative” and drew upon his/this recipe for creativity. As a teacher, he explains, his students today are only interested in mimicking their musical idols. The creativity to create their own music seems..well distant, unobtainable. Its with this background that he created “1+1 can be”. The idea is simple, when you look at this (1+1) what do see? Do you see the number 2? Or do you see ||||, or 1 > 1 or 1 < 1. All at their root are 4 lines. Think about how many different patterns and variations there are with 4 lines. Its with this, he explains how every element, every song can be broken down into its core elements. Its from these elements, creativity is alive.
All in all, if you looking to have your soul stirred in this soul stew we call life, TEDx fits the bill. But if you are looking to be more creative, then focus on all the wonderful ways 1+1 can be…
If you’re like me the word DevOps may seem quite foreign, although it shouldn’t. To simplify the explanation, its nothing more than tighter collaboration and communication between Development and Operations within an organization. With this tighter collaboration, comes greater efficiencies and reduction in risk when deploying software products and services. Development/Developers are paid change agents. Their job is to respond quickly to a businesses’ needs. Counter to that is Operations. Their job is to resist change for fear of instability. And their lies the problem. These different organizational structures, goals, mindsets and tools all lead to silos of frustration between both sides.
What really put this in perspective for me is this article by Damon Edwards at dev2ops.org. The name of the post says it all, “DevOps is not a technology problem. DevOps is a business problem”. Without proper collaboration between all business entities, the process of a taking an idea from inception, to market literally becomes an up hill battle. This the very essence of DevOps, business enablement. Without the business, we’re all nothing more than glorified hobbyists.
The 3 primary principles of DevOps as defined by Gene Kim, founder of the IT Revolution Press and Tripwire fame are as follows…
Do you work in an environment where these principles are working?
For the last two years I like to recap the year with events that have been instrumental in Varrow’s success. Although there are many, I document only what comes to me in my stream of consciousness (mostly recapping Varrow.com). Hope you enjoy, and have time to reflect on this whirling dervish we call Varrow…Here’s to a successful, and customer focused 2013!
Varrow Madness 2012 – Certainly the largest partner event in the Carolinas, #vm never disappoints. Labs, sessions, keynotes, beer and basketball, what’s not to like? Whats got me most excited about this year is more engineering participation for the sessions. I like to think ToT was a catalyst for this but maybe its the new blood pushing the old blood : )
Company Support of Home Labs – As eddy would say from Christmas Vacation, this truly is the gift that keeps on giving. It’s a fact engineers are naturally more hands on, to this point home labs have excelled the learning process here at Varrow. Investing in training has been a huge focus this year, and it shows. Engineers are more confident, customers are more comfortable, trust is built, lifers they become. Its that simple.
More vExperts added – VMware vExperts that is, and its VMware’s way of showing support for those in the community that contribute, promote and evangelize their products. Jason Nash and I were the lone rangers for the last two years but 2012 introduced Martin Valencia, Andrew Miller and Phillip Jones (by acquisition) to the list. Remember, anyone can apply, you can nominate yourself! Just contribute and be prepared to document. 2013 nominations will be here before you know it…
TrainSignal Exposure – I don’t know how he has time for it but Nash has produced both the vSphere Advanced Network Training and the soon to be released vCenter Operations Manager course over the last year. The latter of which I served as tech reviewer. Not only do you get to experience Jason’s witty knack for teaching but both are jammed pack with useful, practical and detailed technical goodies. Huge exposure for Jason and Varrow!
VMware View focused partner of the Year – For one that delivered the first View implementations at Varrow, I couldn’t be happy about this. VMware has provided funds to develop and grow our View business. For many years we were on the fence as to whether or not VDI would be core to growing our business. With these funds, the right leadership and engineers in place, we’ve shown that VDI indeed is a pillar of this organization.
EMC Velocity Services Quality Award again – This award from EMC is based on what every services organization should strive for, Customer Satisfaction. We’ve accomplished this year over year. Blood, sweat and tears, it ain’t easy but its what drives us to do better.
Top Storage Practice in Nation so says CRN and me : ) - I’m not even sure what this really means or what its based on, but CRN gave us an award for it. I always knew this, I’m glad others have recognized the overwhelming talent in this group.
4 Presenters at VMworld 2012 - Brian Boyd, Jason Nash, Greg Camp and Myself, if you didn’t know. This was a big deal for me, really pushing my comfort zone. But I learned a lot and realized the obvious. Public speaking is easy if you practice, have a mastery of your subject, and memorize your starting and ending statements. Everything in between is all you. And that is what everyone comes to see and listen to, you!
Inc 500 awarded number 447, CRN’s Fast Growth 100, #1 in Triad FAST 50 again, and CRN’s 2012 List of Tech Elite 250 – Yep there are more, these are but a few. These will come and go and ultimately are a byproduct of our rocket growth. At days end, the service quality awards are what gives our foundation.
2 office moves – GSO and CLT have moved entirely and the Raleigh office expanded. I, being 100% remote have not seen any of the spaces in person, but I understand this was a much needed expansion. Varrow has dressed up and taking it to a new level. I’m so proud of what we have built.
10’s of new faces – I’m not even sure how many Varrow-ites (39 it seems) we have added this year, but just remember I’m number 5 : ) And if I haven’t said it, Welcome!
Teachers of Tech (ToT) introduced – Really glad this is getting traction in 2012. My suspicions are that we were all thinking about this avenue. Sometimes it just takes someone to own it. I for one, look forward to many great sessions over 2013. For those outsiders, ToT is a weekly internal webinar on a particular process or technology that the engineers host. You simply sign up for a slot and speak for an hour on whatever “technical” topic you want. Their recorded and posted on online for those that can’t attend. We hope to expand this externally, so look for more info to come…
I can only imagine what we’ll accomplish together next year. 2012 was big, but 2013 will be bigger…