Virtualization has disrupted the I/O path, reducing the value of enterprise storage arrays. But all is not lost: An effort is afoot to make things right by increasing communication between hypervisor and array and demultiplexing data before it is stored. “What we have here is a failure to communicate” The core problem with the I/O blender is that virtual machine disk images … [Read more...] about The I/O Blender Part 3: Behold the Power of the Demultiplexer
Archives for May 2012
Virtualization is a disruptive technology in every sense of the word. By abstracting and simplifying physical resources, virtualization enables dynamic utilization. But this “translation” from physical to virtual disrupts the assumptions that enable performance and flexibility of physical devices such as storage arrays. Your Assumption Is Invalid See Storage Arrays Do A … [Read more...] about The I/O Blender Part 2: What Does Virtualization Do?
Boom! Seagate just responded to Western Digital's acquisitions of Hitachi's Global Storage Technologies subsidiary by acquiring LaCie. The â‚¬49 million transaction solidifies Seagate's presence in the retail space, especially on the Apple side of things. In this way, Seagate will use LaCie to offset Western Digital's G-Tech offerings. To me, this acquisition is all … [Read more...] about Personal Storage Just Got More Interesting: Seagate Acquires LaCie
Back in the day, when data was smaller and servers were machines, I/O followed a predictable pattern. Storage arrays could anticipate requests and RAID was beautiful. Then came virtualization, and with it an end to ye olde storage I/O path. Server = HBA = LUN It was a simpler time back in the 1990's. Each server had a SCSI host bus adapter (HBA) of its own. Maybe two, if … [Read more...] about The I/O Blender Part 1: Ye Olde Storage I/O Path
Storage arrays are big, expensive, and difficult to manage. Plus, concentrating storage in a single device puts everything at risk if there is an outage. So why buy a storage array at all? Arrays do a few things very well, and this often makes up for the difference, on balance. Storage Arrays Accelerate Performance One of the most important advancements in data storage in … [Read more...] about Storage Arrays Do A Few Things Very Well