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.
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.
The SPC contacted SUN regarding violations of the SPC 'fair-use' terms. To that end, John and Valdis have retracted both the newsletter comments and blog posts that claimed 'faster than SVC' therefore the links in this post no longer show their original content. I have left this post in place for... [Continue Reading]
I've been meaning to post this entry in my Storage Virtualization part work for some time now. Day to day work, testing some new functions and customer commitments have left little, if any, time to dump my thoughts. This weekend has proved to be a good respite, and allowed me not only time to catch... [Continue Reading]
This morning one of my colleagues in my office bay started a discussion about the fine line between divulging useful technical information on this blog-o-sphere while maintaining the confidentiality of technical information, product plans and general intellectual property of IBM. I explained to him... [Continue Reading]
There has been much said about the VMware certification process, why isn't SVC fully supported etc; particularly in comments on my blog. Today IBM and VMware jointly announced full certification of SVC 4.2.0 with VMWare ESX 3.0.2. Read the full press release here . As I had previously commented, we... [Continue Reading]
I'd like to at least take my hat off to HDS for once. I have been laying into them with apparently car salesman like maths , but then it had to be said. So why this sudden note of appreciation. For stepping up to the mark and submitting their USP-V to the Storage Performance Council , SPC-1... [Continue Reading]
I've been following the Solid State Disk (SSD) evolution over the last year or two with a selfish eye. Running one of the largest test stands we have in the Hursley SVC lab (from a number of spindles point of view) I too suffer the pain of drive fall-out. Its more of just an annoyance to me though,... [Continue Reading]
Following on from Chris' comments in "Pause for Thoughtput" I had a look around and there are some interesting posts being made. Being one of those close to the "Virtualmania" scene I had a look through the second paper Gear6 have written, "Provisioning for Predictable Performance" . Jumping to the... [Continue Reading]
I must admit that one of the things I have looked forward to this year has been the Saturday qualifying and Sunday race days in the Formula 1 calendar. It's been a great F1 season so far, not just because I'm a Brit (well Scotsman abroad - Coulhtard was always British when he won... ) Nobody, least... [Continue Reading]
I spotted Hu has made a long post about the new mid-range USP, and various articles out there are discussing it. However, it seems my replies to both Hu and Claus fell on deaf ears - yet again they are quoting those incredulous attachment figures. So yet again lets look at the numbers Claus and Hu... [Continue Reading]
It depends... I've been heavily involved with the soon to be published 'SVC Best Practices and Performance' Redbook - I'll post a link as soon as the book is available, but it struck me that when quizzed by the writers for an opinion on X or Y that I found myself starting the reply with... "Well...... [Continue Reading]
Chris posted an interesting solution to provide 3DC disaster recovery , yet only having local virtualization devices. I posted a couple of responses to this question, and commented that this is a complex area of I/O flow and I would describe here how SVC ensures the remote site is - what we call -... [Continue Reading]
Talk to any storage or system administrator and one of their major pain points (after data movement pains) is making A work with B and keeping C at the right firmware level so that A works with C as well as B and so on. Sometimes this just isn’t possible and can lead to infrastructure ‘exceptions’... [Continue Reading]
I find it interesting that v2 of Invista has been so quietly 'introduced' - very unlike EMC. I spotted a reference to it a few months back on Mark's blog, but couldn't find any press or EMC website coverage. The article from CBR covers some interesting points that I wanted to bring up here. I've... [Continue Reading]