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Peter Velikin

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Top Stories by Peter Velikin

IT Dog getting down and dirty today because that’s what it is going to take to deal with the dirty world of “vendor lock-in.”  There is really no way to dress this up and make it smell nice because it just stinks and although I would roll in something this nasty down at the dog park, I wouldn’t want you to have to live with the smell. I read an excellent article by Chris Mellor at The Register discussing the need to develop a standard for the server flash-storage array interface and it really got me thinking about the vendor lock in issue. “What is EMC up to with Project Lightning?” We all are kind of waiting to find that out now aren’t we?  EMC announced Project Lightning as their foray into the server side flash business, putting it sites on the nice people at FusionI/O, STEC and others.  I am wagging my tail to see EMC recogn... (more)

SDD Cache: Why is Cache Write Through Good?

Whether ‘tis nobler in the mind to suffer the slings and arrows of your IT manager or to take up cache against a sea of data. With apologies to Bill Shakespeare, the IT Dog is discussing two different cache write policies: write through and write back. Let me take a run at telling you what they are, why they are different and what you need to think about when you decide what policy to use. Cache Write Through This is the easier to explain and understand of the two policies discussed here. Cache write through is like having your cake and eating it too. Data is written into cache ... (more)

SSD Performance: Intel X25-V 40 GB

This blog is the third in a series which present test results of extensive testing performed at Velobit to investigate SSD IO bandwidth when SSDs are operated in a simulated enterprise environment.  The test set up and procedure is documented in the first blog post of this series which can be found by clicking here. Test SSD: Intel X25-V SATA based SSD Test 1: 4 KB Data Request Size Figure 1 shows the measured IO bandwidth as read/write ratio is varied when the request size is 4 KB. The data shows that as the read/write ratio goes from 100% reads to even a small percentage of wr... (more)

How to Successfully Deploy SSD in the Enterprise

Register > Solid State Disk (SSD) technology is one of the hottest IT areas in 2012. The promise to eliminate storage IO bottlenecks and increase application performance, enable server virtualization, enable data center growth, and reduce IT costs has prompted 83% of all IT departments to consider SSD. But those planning an SSD deployment face a variety of deployment choices. Moreover, choosing poorly can yield large expense, disruption to existing IT environments, and a complex new set of storage management tasks. Join Brian Garrett, Vice President at the Enterprise Strategy Gro... (more)

Using RAM in SSD Caching

Dr Dog Says “You Need More RAM In Your Cache Diet” Well, I am not really a doctor, but I play one on TV. You may remember (if you are old enough) that line from the 1986 Vicks-44 TV commercial.  Anyway, while I may not be a real doctor, I can certainly tell you about why you need more RAM in you cache diet. “I Think My Cache Diet Is Great” If you were happily running your IT system but needed some additional performance, chances are you turned to some kind of SSD caching solution to improve performance at a lower cost point than adding more servers or storage. You went on what I a... (more)