Hu's Blog

Vinod Subramaniam, the founder and CEO of Clearthought Inc.  provided the following comment on my post on Cartesian scaling.

My fellow HDS bloggers Ken Wood and Michael Hay have been using the term Cartesian scaling to describe what I call Scale up and Scale out. Cartesian scaling is the ability to scale in two directions, up and out. I have resisted using this term since I thought it sounded too technical to describe what [...]

Late last night I got an email from  Christopher Kusek asking about FICON Encryption of data at rest.

February 14 marks the start of the Chinese New Year, Year of the Tiger. This year it happens to fall on Valantine’s Day.  Here is a greeting, wishing you all the best for this New Year From the Folks at Hitachi Data Systems.

Hitachi Data Systems was the first vendor to deliver a switch based storage  architecture over ten years ago. Recently we are starting to see storage vendors deliver storage systems that include a switch in their architecture. However, the new switch architectures are designed for loose coupling  of modular storage nodes while the Hitachi architecture is designed for [...]

I recently spoke to two storage analysts about the effect of server virtualization on storage resources. Both agreed that the effect of virtual machines will be to increase the I/O workload coming from the VM hardware platform by the number of VMs that are virtualized and that the resulting I/O would be very random.