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Reflections on VMworld 2013

Although I haven’t attended this week, I have been keeping more than a passing eye on the events unfolding at this year’s VMworld 2013.  After having absorbed some of the keynotes, blog posts and tweets, it’s about time I expressed an opinion on some of the announcements so far. The Software Defined Mantra Say it often enough and people will ... Read More »

Further Thoughts on VVOLS (Updated)

Following on from my first post on VVOLs, I did a little research on the two technology previews that had been presented at this and last year’s VMworld – sessions INF-STO2223 & VSP3205 respectively.  The sessions fill in a few background ideas and seem to have evolved slightly over the past 12 months.  Here are some of the contents. I/O ... Read More »

Windows Server 2012 (Windows Server “8″) – Virtual Fibre Channel

This is one of a series of posts discussing the new features in Windows Server 2012, now shipping and previously in public beta as Windows Server 8.  You can find references to other related posts at the end of this article.  This post reviews the new Hyper-V 3.0 feature, Virtual Fibre Channel. Background Virtual Fibre Channel (VFC) enables a Hyper-V ... Read More »

Slides from London VMUG 19th July 2012

Here are my slides from the London VMUG yesterday.  It was a great event and thanks to everyone who attended the session.  Good to meet you all!   Read More »

Hitachi Attacks Migration Costs with Non-Disruptive Migration Feature

Hitachi Non-Disruptive Migration

It’s probably fair to say that data migration is one of the most tedious tasks in storage management.  Moving data from one array to another, simply to decommission a piece of hardware or for load and capacity balancing, doesn’t ever inspire me. But it’s a necessary evil and one I’ve done many times.  Unless the existing storage configuration has been ... Read More »

VAAI Follow Up – VMware Recommend Disabling Thin Reclaim

Last week VMware issued this advisory on their knowledge base, recommending the disabling of VAAI Thin Provisioning reclaim in ESXi 5.0.  Apparently it seems to be causing “poor performance’ during certain vSphere actions like Storage vMotion.  The “cause” section contains the somewhat vague comment as follows: VAAI Thin Provisioning is enabled by default on devices that adheres to T10 standards. ... Read More »