Skip to main content


Showing posts from September, 2014

Storage Sizing: More Detailed

When it comes to measuring a storage system's overall performance, Input/Output Operations Per Second (IOPS) is still the most common metric in use. There are a number of factors that go into calculating the IOPS capability of an individual storage system. In this blog, I provide introductory information that goes into calculations that will help you figure out what your system can do. Specifically, I explain how individual storage components affect overall IOPS capability. Here are three notes to keep in mind when reading the article: ·Published IOPS calculations aren't the end-all be-all of storage characteristics. Vendors often measure IOPS under only the best conditions, so it's up to you to verify the information and make sure the solution meets the needs of your environment. ·IOPS calculations vary wildly based on the kind of workload being handled. In general, there are three performance categories related to IOPS: random performance, sequential performance, and a comb…

Storage Sizing: A start

I credit my knowledge of storage sizing to brad fair (Solution architect)  There are really only two factors in disk performance: How long it takes for the disk to be read from or written to (measured in IOPS), andHow long it takes for an amount of data to get from the initiator to the target (measurement of bandwidth, typically Gb/s)Notice that there's nothing about Fibre Channel vs iSCSI vs FCoE in there. People often make the mistake of generalizing performance, with the solid misconception that Fibre Channel is higher performing that iSCSI - it's simply not true. You might argue that the second factor in performance is where Fibre Channel wins. Thanks to iSCSI's redirect feature and MPIO capabilities, one was as fast as another. Now that 10Gb Ethernet is prevalent in most iSCSI vendors' products, iSCSI has the leg up. IOPS IOPS, or Input/Output Per Second, is made up of two components on all disks but solid state. Those are the spindle speed and the time it takes for …

IBM and HP: Two different tales of Tech Giants

IBM and HP are two Tech Giants for nearly 75 years. These companies have gone transformation so many times that its difficult to recognize its original form.

Times have changes. So many different opportunities are arising daily and new competitors are emerging daily.

Lets discuss how these 2 Giants are doing:

IBM is pioneer in so many things that you cannot count. After nearly going bankrupt in early 1990s, it transformed into a service based company. It work well for more than 2 decades. But now IBM is again facing a huge challenge. Rules of games have changed, but IBM is still resisting to new challenges.

With the rise of cloud computing, IBM is struggling in the new environment. Things are so bad  that as per CNBC, it is a cloud challenged company. Its true. IBM still wants to do the business in old ways of managed services. Manages services is dying. IBM response for cloud is Softlayer. Softlayer is a substandard half cloud technology. IBM is loosing money now. its profits are…