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Showing posts from June, 2014

Citrix -Provisioning Services Architecture

In a XenServer-only implementation, virtual disk files for each virtual machine are stored in a storage location. Organizations with a significant number of virtual machines incur an increase in storage cost, as well as maintenance costs. Provisioning Services complements XenServer by providing simplified virtual machine management and reduced storage requirements. Provisioning Services allows an engineer to create one standard virtual machine image that is stored and updated. This standard image is streamed to server or desktop target devices. Resource mappings stored on a Provisioning Services server identify which virtual machine images are assigned to each target device. Workloads can easily be repurposed by updating a vDisk mapping and rebooting the target device.
Provisioning Services vDisk changes can be stored in a cache file. Storing changes for each target device that shares a common virtual machine image requires far less storage space than individual virtual machine files …

XenApp Installation and Configuration

We are assuming that,  virtual machines are hosted using Citrix XenServer. Each virtual machine is an independent system called a guest operating system. Citrix XenCenter allows you to connect to the XenServer environment and administer guest operating systems
This is also applicable in case of Hyper-V and VMware Environments,
First We need to Create XenApp Farm SQL Database
1. Create a VM for SQL database. It will host XenApp Farm SQL database. Let’s name it as     ABC-SQL1 2.    Start the virtual machines in the following order: a.     ABC-DMC1 b.    FILER1 c.     ABC-SQL1 d.    ABC-PVSRV1 e.     ABC-PVSRV2 Wait until each virtual machine is completely powered on and at the authentication screen before powering on the next virtual machine. 7.    Log on as a domain administrator to the ABC-SQL1 virtual machine. 8.    Click Start > All Programs > Microsoft SQL Server 2005 > SQL Server Management Studio . The Connect to Server screen appears. 9.    Click Connect to connect to the ABC-SQL1 …

Green Datacenter

Note: This blog is written with help of my friend Rajanikanth Katikitala


Green IT •       Use servers with less power demands. The lower the PUE, the more efficient data center infrastructure Power Usage Efficiency =       Total facility Power          -------------------------------                   Total IT equipment Power •       Floor space reduction by moving to high density blade servers •       Use hot & cold aisle containments to avoid mixing of hot air with cold air •       Use rack  or row cooling instead of traditional CRAC units •       Use free cooling. Retrofit outside air supply where possible •       Right size the cooling requirement as per the IT load to avoid over sizing cooling. •       use high density area to focus on cooling •       Distribute high-density racks throughout the layout to mitigate hot •       spots; use spot rack cooling as necessary



Data Center Infrastructure Standards The Uptime Institute “tiers”  The uptime Institute classifies data centers a…