Author Archives: Humair

Python – Implementing Caching in Your Applications via Dictionaries

Posted on April 6, 2012 by Humair

In this blog I demonstrate how you can implement and take advantage of caching in your Python scripts/applications. Caching allows you to complete tasks more rapidly by storing and reusing results for repeated operations using the same criteria. For example, … Continue reading →

Posted in Chemistry, Programming Languages, Python, Science, Technology, Tips & Tricks | Tagged amu, atomic mass, atomic mass unit, atomic masses, cache, caching, caching scheme, chemistry, compound, dictionaries, dictionary, dictionary cache, element, formula mass, h2o, mass, molecular mass, molecule, Python, python dictionary, python dictionary cache, water | Leave a comment

Coding a XenServer Client in Python – Monitoring Multiple VMs via Multiple Threads

Posted on March 30, 2012 by Humair

In some prior blogs I had written about developing an ESXi client in Java which could connect to a VMware ESXi server and perform some management tasks. In this blog, I will describe developing a Cirtrix XenServer Client in Python … Continue reading →

Posted in Networking, Programming Languages, Protocols, Python, Technology, Virtualization and Cloud Computing | Tagged Citrix, Citrix Xen, Citrix Xen API, Citrix XenAPI, Citrix XenServer, HueXenClient, ICMP, ICMP packets, Network Monitoring, ping, PMW, port, ports, PyDev, PyDev plug-in, Python, Python megawidgets, Python megawidgets library, python pmw, thread, threads, Tkinter, Tkinter GUI library, VM Monitoring, VM Network Monitoring, Xen, XenAP, XenCenter, XenClient, XenServer, XenServer 6.0, XenServer pool | Leave a comment

EIGRP – Best Path Selection

Posted on March 27, 2012 by Humair

By default EIGRP uses bandwidth and delay of the line to determine the best path to a remote network. However, if desired, EIGRP can use a composite of four metrics: bandwidth, delay, reliability, and load. Maximum transmission unit (MTU) is … Continue reading →

Posted in Cisco, Labs, Networking, Protocols | Tagged bandwidth, Cisco, Cisco 3725, Cisco 3725 router, Cisco 3725 routers, delay, delay of the line, EIGRP, EIGRP calculation, eigrp load balancing, Enhanced Interior Gateway Routing Protocol, equal cost load balancing, load balancing, router, routing table, topology table | Leave a comment

Setting-up Basic iBGP and eBGP on Cisco Routers

Posted on March 15, 2012 by Humair

The Border Gateway Protocol (BGP) is a protocol used to make core routing decisions on the Internet. BGP is commonly mislabeled or referred to as an IP routing protocol. However, it is not a routing protocol; rather, it is a … Continue reading →

Posted in Cisco, Networking, Protocols, Technology | Tagged AS, Autonomous Number, Autonomous Numbers, BGP, BGP table, Border Gateway Protocol, Cisco, Cisco 3725, Cisco 3725 router, eBGP, established, established state, External BGP, iBGP, Internal BGP, Multihomed, neighbor, neighbor relationship, Neighbors, ping, prefxes, redistribute connected, redistribute static, redistribution of static and connected routes into BGP, show ip bgp, show ip bgp summary, state | Leave a comment

Single/Dual and Multihomed Connections

Posted on March 12, 2012 by Humair

Network engineers will sometimes speak of connections to their ISP(s) in terms of single homed, dual homed, single multihomed, and dual multihomed. Here is a breakdown and clarification of what this terminology means: – Single Homed (1 link per ISP, … Continue reading →

Posted in Networking, Protocols, Technology | Tagged BGP, Border Gateway Protocol, connection redundancy, dual homed, dual multihomed, internet redundancy, isp, isp redundancy, redundancy, single homed, single multihomed | 1 Comment

Expanding the Java vSphere Client Code Example (HueVIClient 2.0 – Connecting to VMware ESXi)

Posted on February 27, 2012 by Humair

In a previous blog I demonstrated using the VMware VI (vSphere) Java API with VMware ESXi (see prior blog Using the VI Java API with VMware ESXi). I’ve decided to add to this code to provide further functionality and demonstrate … Continue reading →

Posted in Java, Programming Languages, Technology, Virtualization and Cloud Computing | Tagged ESXi, HueVIClient, HueVIClient 2.0, Java VI client, VI Client, VI Java API, vmware, VMware ESXi, VMware VI vSphere Java API, vSphere Client, vSphere Java API | 2 Comments

Cloud Computing and the Pace of Technological Innovation

Posted on February 23, 2012 by Humair

Everyone knows for the most part that technology, especially in Silicon Valley, is a fast moving beast. Nowadays, it’s not a field for people to get into halfheartedly; otherwise, you may find yourself being eatin’ alive by the competition. It’s … Continue reading →

Posted in Business, Humair's News Releases, Technology, Technology, Virtualization and Cloud Computing | Tagged Cloud Computing, geek, Silicon Valley, tech, tech junky, Technology, virtualization | Leave a comment

The Commoditization of the Hypervisor

Posted on February 22, 2012 by Humair

It’s amazing; since the introduction of hardware based virtualization made possible with processor technology such as the Intel-VT and AMD-V (see prior blog The Power of Virtualization – a competitive edge), everyone and their mother is coming out with a … Continue reading →

Posted in Business, Technology, Technology, Virtualization and Cloud Computing | Tagged AMD-V, Citrix, commodity, hypervisor, Intel VT, Live Migration, live storage migration, Microsoft, Oracle, oVirt, paravirtualization, Red Hat, Storage VMotion, virtualization, vMotion, vmware, Xen, XenServer | Leave a comment

Demonstrating Python’s String “replace” Method via the Command-line

Posted on February 21, 2012 by Humair

Python’s String “replace” method returns a copy of the string in which the occurrences of the old substring are replaced with the new substring. You can optionally restrict the number of replacements to a max amount by adding another number … Continue reading →

Posted in Programming Languages, Python, Technology | Tagged command-line, command-line input, Ctrl-Z, end-of-input indicator for Windows, Python, read comand-line input, replace, string, string replacement, substring, substring replacement | Leave a comment

EIGRP and OSPF Redistribution on Cisco Routers

Posted on February 7, 2012 by Humair

This was a quick lab I threw together which I thought was pretty cool. In this lab I use five Cisco 3725 routers [IOS 12.4(15)T10] in which I have two groups of routers each on a different subnet and running … Continue reading →

Posted in Cisco, Labs, Networking, Protocols, Technology | Tagged Cisco, Cisco 3725, Cisco 3725 router, cisco router, EIGRP and OSPF Redistribution, EIGRP Redistribution, EIRGP, OSPF, Redistribution, router | Leave a comment