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 Group, Inc. and
Peter Velikin from VeloBit, Inc. for a comprehensive overview of the key
considerations you must make when building your SSD strategy. This webinar is
intended to help IT executives make wise decisions. You will see first-hand
research on the actual vs. perceived benefits organi... (more)
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... (more)
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)
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)
George Crump from Storage Switzerland recently wrote an article, arguing that
it is better to deploy SSDs in a storage array instead of as a server cache.
The article was sponsored by Pure Storage which happens to sell SSD based
George identifies challenges with SSD caching and tiering solutions. While
some of the topics he raised in the article are valid, he does not present
all sides of these topics. As a result, the article contains positions that
overstate the magnitude of the problems and may lead the reader to the wrong
conclusion. I would like to present ... (more)