Why VSAN and VVOLs are Not Software Defined

homer_doh

Every so often another attempt is made by the vendor community to put a definition to what we call “software defined storage” or SDS.  The current discussion is on VMware Virtual SAN (VSAN) and VVOLs, software features focused on storage within the vSphere hypervisor ecosystem. This seems like a good opportunity for me to review what I’ve written in the past ... Read More »

SFD7 – Primary Data and Data Virtualisation

PrimaryDataGraphic

Storage virtualisation is a technology that is well established in our industry.  In the current “x86″ era, I’ve been using and talking about it for over 10 years, using it to reduce costs, extend the life of older assets and in data migration. All of the original storage virtualisation solutions (with the exception of Invista) sat within the data path and ... Read More »

vSphere vDS SPAN port with Wireshark in 2 minutes

vDS SPAN port with Wireshark-v0.6

I often find myself searching for facts to dispel “hearsay” and guesswork in troubleshooting discussions between the Network and Windows VM teams.  This article is intended to show just how straightforward it is to use the VMware distributed switch SPAN port capability, to put a virtual sniffer on a virtual port on a virtual distributed switch. RSPAN and ERSPAN – ... Read More »

SFD7 – Connected Data, Transporter and Private “Cloud” Storage

ConnectedData

In the IT community I wonder if there is anyone who hasn’t at least tried out (if not heavily used) Dropbox, Box, Google Drive or one of the many other “sync-n-share” cloud storage offerings.  As a refresher for those of us familiar (or new information for those not aware), cloud-based storage solutions provide the ability to store unstructured (file) data in ... Read More »

SFD7 – Catalogic Software Addresses Data Copy Management

Slide05

About 10 years ago I worked on a project for a large bank where we put in place the ability to replicate test data from the production environment to a third array deployed in a lower cost data centre.  The whole design was perhaps overly complex, with scripting required to re-establish replicated LUNs when switching between production sites and to semi-automate ... Read More »

Storage Field Day 7 – Initial Thoughts

IMG_1238

Storage Field Day 7 (11-13 March 2015) proved to be yet another impressive and thought provoking event, with lots of new ideas demonstrating that the storage industry is one of the most innovative and competitive sections of the technology landscape.  Over the next few weeks, I’ll deep dive into some of the more interesting presentations and technologies.  However for now, ... Read More »