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Posted by on Feb 22, 2014 in Featured, vSphere | 2 comments

Upgrading vCenter 4.1 to 5.5 – Lessons learned

Upgrading vCenter 4.1 to 5.5 – Lessons learned

I went “full cowboy” last night and executed an in-place upgrade (to 5.5) of a substantially sized production vCenter. It was running 4.1, contains about 50 UCS hosts, and around 1000 VMs. I ran into essentially every bug/issue along the way, and wanted to document for posterity what I learned. Actually I should say what “we” learned, as I went through the ordeal with a few friends of mine; Scott from Capgemini, and Danby from Honeywell. The vCenter upgrade process is actually fairly simple, (all things considered). You basically just backup your existing database, snapshot (or clone) your existing vCenter (if virtual), mount the ISO and let ‘er rip. I wont go through that process as it already very well documented elsewhere. Looking back the main issue really was just the size of the vCenter database, specifically the vpx_event and vpx_task tables. This was causing DBUHELPER to essentially run out of memory buffer space and crash during the database upgrade. Had I been more careful, we would have either...

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Posted by on Feb 1, 2014 in Featured, Opinion | 0 comments

SDN vs People

SDN vs People

I have been championing the merits of software defined networking (SDN) lately (until I am blue in the face) to pretty much anyone who will listen. I figure that I will either win them over with logic, or they will just get tired of hearing me talk and say, “fine, just shut up and do it already.” I really don’t expect the latter scenario. In my experience the biggest obstacle to new technology and new ideas are the IT veterans themselves. I am just as guilty of this. Steve Jobs has often been quoted as saying that the key to success in this industry is the ability to “think different.” Thinking differently is what drives innovation and moves us forward. It should be clear to almost everyone in this industry that the fundamentals that you understand and cling to today, will not be so fundamental a few years from now. The critical problem that SDN has at the moment is that the network administrator’s thinking (as a whole) lags...

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