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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)

The Many Places You Can Go with SSD Caching Software

Disruptive technology is a term used to describe an idea or invention that typically disrupts an existing market, often completely displacing an earlier technology.  Sometimes disruptive is great (e.g. digital cameras and cell phones), and sometimes disruptive is not so great (e.g. laser video disks).  SSDs are a disruptive technology in that they are clearly changing the enterprise storage market.  The verdict is still out on just how disruptive SSDs will be; as is the case with many disruptive technologies, it is going to take some time to figure out exactly what to do with SSD... (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)

Effects Of Linux IO Scheduler On SSD Performance

This blog begins a series of blogs which present test results of testing performed at VeloBit to investigate the effects of different Linux IO scheduler algorithms on IO bandwidth when SSDs are operated in a simulated enterprise environment. This series of blogs is similar to the series we previously presented documenting IO bandwidth vs. read/write ratio. This first blog will document the test set up and procedures and present the results from one tested device. In following weeks, I will refer the reader back to this blog for test set up and procedure information and simply p... (more)

Maximize the Advantage of SSD Caching

File System Alignment for SSDs There are many techniques and methods that can be used to tune an IT system to improve overall system performance.  SSD caching is widely being used as a low cost, easy to implement method to quickly increase performance with little or no impact on existing operations.  One thing that needs to be considered when choosing SSD caching is how to configure a file system to maximize the performance increase SSD caching provides. Operating Systems and Block Size In the past few years, the sector size of HDDs has increased from 512 bytes to 4k bytes.  Relat... (more)