Barry Whyte is a 'Master Inventor' working in the Systems & Technology Group based in IBM Hursley, UK. Barry primarly works on the IBM SAN Volume Controller and Storwize V7000 virtual disk systems. Barry graduated from The University of Glasgow in 1996 with a B.Sc (Hons) in Computing Science. In his 16 years at IBM he has worked on the successful Serial Storage Architecture (SSA) and the IBM DS8000 range. Barry joined the SVC development team soon after its inception and has held many positions before taking on his current role as performance architect. Outside of work, Barry enjoys playing golf and all things to do with Rotary Engines. All posts on this blog are (c) Copyright International Business Machines 2012 - reproduction without prior approval is prohibited.
The house is feeling quite Christmas-e, with the tree and lights having been up for a few weeks, the collection of presents under the tree growing and the usual 'spring cleaning' sessions before the big day. One more day to go, and yet another working year draws to a close. I thought I'd take a few... [Continue Reading]
Back in August I posted about the 'Stealth' announcement of Invista 2.0. It seems that our friends over at EMC decided that after almost 6 months, they'd try again and actually tell the world this time. I thought I'd wait till the end of the week to see if the rest of the marketing, analyists and... [Continue Reading]
I guess I didn't really get the message across in my previous post, well certainly not in the way I inteded from the emails and comments here. The main point I was making was with respect to using a "vanilla" Windows install as the base operating system for a storage product, in particular one in... [Continue Reading]
Back in June Chris Mellor stirred up a few people by suggesting that an unnamed source (I'm guessing someone at DataCore with a chip on their shoulder) was claiming IBM and HDS stole, or even reverse engineered the product to produce our respective SVC and USP products. Tony Pearson quite clearly... [Continue Reading]
I can't help it. It seems that every post that Mr Yoshida makes strikes me as being somewhat questionable. I have much respect for how long he has been in the blogging game. I have no respect for his lack of reader comment acceptance - I've long since given up replying as he decides to ignore those... [Continue Reading]
About two years ago when our DVD player packed up we splashed out on a mid-range Sony DVD-R to replace the DVD player and the old VHS video recorder under the TV. This proved quite useful in finally putting those home movies onto DVD and saving the odd film for future viewing. Not to mention... [Continue Reading]
Today we are have made available IBM System Storage SAN Volume Controller (SVC) Version 4.2.1 with more function than previously announced, including new VMware support, and also announced that IBM has passed an historic milestone by shipping its 10,000th SVC node. A press release issued today (see... [Continue Reading]
Just a quick post to let those interested know that the [SVC Best Practices and Performance Guidelines] Redbook has just been made publicly available on the IBM Redbooks website . Many thanks to Jon Tate and his team of able (and pestering) technical writers for all their hard work. Jon and I spent... [Continue Reading]
There is a big difference to "in the switch" network based storage virtualization and "appliance" network based storage virtualization. Hu Yoshida and Dr. Kevin McIsaac, seems to have forgotten that in my comparison series of the three approaches to storage virtualization, both the appliance and... [Continue Reading]
Last week was a long one. The main SVC test-lab in Hursley suffers from the same problems that haunts most machine rooms - lack of power and not enough cooling. Thats not to say that we don't have a lot of both, just that as the support and test requirements have increased over the last five years,... [Continue Reading]
With the GA of IBM SAN Volume Controller (SVC) v4.2.1 only a couple of weeks away, its been the usual last minute rush to get the last few code changes benchmarked on my performance stand. Luckily the set of scripts and tools I inherited, and have modified over the years, allow 24x7 benchmarking,... [Continue Reading]
I promised a bit more detail on the very limited sample set used by EMC's latest blogger Dr Kartik , in response to his analysis that SPC-1 IOPs is directly proportional to the number of drives used by the system under test. So I cannot deny the fact that : larger number of drives = larger IOPs... [Continue Reading]
IBM today announced the next release of SVC - version 4.2.1 - which will be generally available as of November 16th. The key highlights of this release are : Copy Services Enhancements - including Incremental FlashCopy, Cascaded FlashCopy, configurable copy services space Aid business continuity by... [Continue Reading]
Over at The SAN Technologist Steven is making some wild and mostly inaccurate statements, particularly about SVC, as well as some curious associations between startup company failures and storage virtualization. He asks : So why has storage virtualization failed? I wasn't aware it had, and with SVC... [Continue Reading]
With the kids having next week off, its time for the trek back up the M6 to Scotland to take them to see their grandparents. After a few manic weeks at work with calls at both ends of the day, I'm off for some well needed rest back in Glasgow. I will reply to any comments when I return.