In part one of this Write Amplification (WA) series, I examined how WA works in basic solid-state drives (SSDs). Part two now takes a deeper look at how SSDs that use some form of data reduction technology can see a very big and positive impact on WA.
Data reduction technology can master data entropy
The performance of all SSDs is influenced by the same factors â€“ such as the amount of over provisioning and levels of random vs. sequential writing â€“ with one major exception: entropy.
One of the most simultaneously exciting and frightening times in a recent gradâ€™s life is the much anticipated yet all-too-sudden transition from student to real-world employee. The first summer after college graduation differs for each person. Some travel abroad, some relax at home, and others jump straight into careers. In my case, I was fortunate enough to be one of 120 interns hired around the world at LSI Corporation this year.
As a business marketing graduate, I was intimidated, to say the least, coming into a company in the high-tech industry.
Every year I diligently get in line for my annual flu (or more technically accurate â€śseasonal influenzaâ€ť) shot.Â Iâ€™m not particularly fond of needles, but I have seen what the flu can do and the how many die each year from this seasonal virus.
When you get the flu shot â€“ or, now, the nasal mist â€“ you and I are trusting a lot of people that what you are taking will actually help protect you. According to the CDC (Centers for Disease Control and Prevention), there are 3 three strains, (A, B &C Antigenic) of influenza virus and of those three types, two cause the seasonal epidemics we suffer through each year.
Have you ever seen the old BBC TV show â€śConnectionsâ€ť? Itâ€™s a little old now, but I loved how it followed threads through time, and I marveled at the surprising historical depth of important â€śinventions.â€ť I think we need to remember that as engineers and technologists. We get caught up in the short-term tactical delivery of technology. We donâ€™t see the sometimes immense ripples in society from our work â€“ even years later.
I got a flurry of emails yesterday, arranging an anniversary get-together in August at the Apple campus.
When I was growing up, my parents always had words of wisdom like â€śEat your vegetables!â€ť or â€śSit up straight!â€ť and â€śDonâ€™t stare at the sun!â€ť But I donâ€™t recall them ever saying to me, â€śTake all of your vacation!â€ť
Of course, my parents didnâ€™t know how important vacation would be to me as an adult. Actually, Iâ€™ve discovered that vacation is important to all of us. The health benefits of getting away from it all canâ€™t be overstated. We all need to strike a balance between work and play; but unfortunately, many of us donâ€™t do that.
We all watch the local weather and wonder how forecasters predict (or in some cases mis-predict) the future of weather.Â While they may not all agree on the forecast, they do agree that the more current and historical data you have, the better your ability to predict what might happen over the next hours, days and weeks.
A term used to describe this growing amount of information is Big Data, and more and more of it leverages Hadoop, a flexible architecture that provides the analysis tools and scalability required to comb through and utilize all available data.Â
In todayâ€™s solid state drives (SSDs), the NAND flash memory must be erased before it can store new data. In other words, data cannot be overwritten directly as it is in a hard disk drive (HDD). Instead, SSDs use a process called garbage collection (GC) to reclaim the space taken by previously stored data. This means that write demands are heavier on SSDs than HDDs when storing the same information.
This is bad because the flash memory in the SSD supports only a limited number of writes before it can no longer be read.
I’ve just been to China. Again. Â Itâ€™s only been a few months since I was last there.
I was lucky enough to attend the 5th China Cloud Computing Conference at the China National Convention Center in Beijing. You probably have not heard of it, but itâ€™s an impressive conference. Itâ€™s â€śthe oneâ€ť for the cloud computing industry. It was a unique view for me â€“ more of an inside-out view of the industry. Everyone whoâ€™s anyone in Chinaâ€™s cloud industry was there.
All employees deserve a work environment that enables them to be comfortable, motivated and productive. Maintaining a healthy workplace is also good for business. At LSI, we have zero tolerance for anything that compromises our workplace â€“ including harassment.
Often in society, itâ€™s intentional, but many times people are unaware that their behavior is actually harassment. From off-color jokes to inappropriate physical contact, harassment can take many forms. Whether the offenders are aware or unaware of their actions, there really is no excuse for it.
In preparation for the development of Windows ServerÂ® 2012, Microsoft polled customers and found that features that make high availability easier to configure and more affordable are critical. Little wonder. The features are pennies from heaven to the vast universe of smaller IT shops that often have found traditional high-availability solutions too expensive and difficult to install and maintain.
In a recent video, John Loveall, principal program manager for the Windows Server Division of Microsoft, discusses how MicrosoftÂ® Windows Server 2012 and the LSIÂ® Syncroâ„˘ CS solution can make it easier for organizations of all sizes to deploy high availability.