About this blogThis blog is mostly about my pursuits in Data Science. Previous blog entries also dealt with storage, compute, virtualization and professional services. Currently the focus is on Data Science, including Big Data, Hadoop, Business Intelligence, Data Warehouse, Data Integration and Visualization. From time to time I will blog about other things of interest. The opinions expressed in this blog are entirely my own and should not be taken as the opinion of my employer.
Category Archives: CCIE
Some of you may know me as a sage hacker from the mid 80’s to the early 90’s. Although, if you met me after 1994, most of you probably don’t know that about me at all. It was a previous … Continue reading
One issue to be mindful of when configuring Cisco MDS switches with Brocade switches is that Brocades Per VC Flow Control must be disabled. Cisco MDS 9000 switches do not support Brocades Per VC Flow Control. The flow control will … Continue reading
Anyone who comes from a Fibre Channel background likely has a pretty good understanding of Buffer to Buffer (B2B) Credits. The Fibre Channel network is designed so that all capacity within the system is carefully distributed and not oversubscribed. This … Continue reading
Back when I built my storage lab, I had to build separate physical servers (WIN1, WIN2, WIN3 and MGMT) each with their own fibre channel cards and I/O paths. Today, VMware has VMDirectPath I/O, which allows you to take multiple … Continue reading