From the VP of Online Marketing at VeloBit

Peter Velikin

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Top Stories by Peter Velikin

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 am calling a “cache diet” (no, not the “crash diet” you went on last year to lose a few lbs).  You may think your cache diet is great.  “Dog, we got some performance improvement and the applications guys are not bothering me anymore, at least for now.”  And it is true, you did see some perfor... (more)

Doggin’ It with VDI

Hey there; the IT Dog back with some color commentary on our VDI experience. When I first heard the name, I thought VDI was the latest model Volkswagen diesel, but as the guy with the suit explained in the last blog, VDI is Virtual Desktop Infrastructure.  Now that you know what VDI means, I am sure you know all there is to know about it, right?  Well, I wish it was that easy for me. Where Do I Begin? I guess I’ll start from the beginning.  At my company, my IT guys were at their wits end trying to manage the 1000 or so desktops, spread out over four different locations, with va... (more)

SSDs: The Beginning of the End for RAM Caching?

For years, the solution to IO bottlenecks has been pretty consistent: (1) add spindles to decrease seek time and increase throughput, and (2) add as much RAM as you can so your filesystems and applications can cache hot data and avoid disk access entirely.  These brute-force attempts to gain performance are inherently flawed and costly.  The price of increasing the number of disks in an array adds up quick, to say nothing of the investment in additional JBODs when you run out of slots in your array.  And although the cost of consumer-grade memory has fallen, relying upon RAM for... (more)

Why Content Locality Caching Shines in Virtual Environments

Virtualization has been used for many years to maximize the usage and value of installed server hardware. It allows resource sharing of single computer among many users through virtual machines (VM) that are securely isolated and highly reliable. In recent years, companies like VMware has been extremely successful in deploying virtualization products to help many existing IT installations increase performance without physically increasing their hardware investment. One disadvantage of a virtualized environment however is the traditional primary storage architectures were not desi... (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)