Load Balancing with NFS and Round-Robin DNS

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Those of you who have been using NFS with vSphere over the past number of years will be aware that VMware currently only supports NFS v3 over TCP. There is no multipathing with this version of NFS, and although NIC teaming can be used on the virtual switch, this is for failover purposes only. To Read more...

VDS Best Practices – Operational aspects (Part 6 of 6)

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Operational best practices After customers successfully design the virtual network infrastructure, the next challenge for the customer is how to deploy the design and how to keep the network operational. VMware provides various tools, APIs, and procedures to help customers deploy and manage their network infrastructure effectively. Following are some key tools that are available Read more...

Storage DRS and Storage Array Feature Interoperability

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We've had a number of queries recently about how Storage DRS works with certain array based features. The purpose of this post is to try to clarify how Storage DRS will behave when some of these features are enable on the array. The first thing to keep in mind is that Storage DRS is not Read more...

VDS Best Practices – Blade Server Deployments (Part 5 of 6)

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Blade Server in Example Deployment Blade servers are server platforms that provide higher server consolidation per rack unit along with benefits of lower power and cooling costs. Blade chassis that hosts the blade servers have proprietary architectures and each vendor has its own way of managing resources in the blade chassis. It is difficult to Read more...

A question about slot sizes…

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By Duncan Epping, Principal Architect, VMware Yesterday I received a question on twitter: Hi, to settle an argument in the office, if no reserves are in place, does number of vCPU’s affect slot size in vSphere 4? Thx First of all, what is a slot? The availability guide explains it as follows A slot is Read more...

VMware's Software FCoE (Fibre Channel over Ethernet) Adapter

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Introduction In vSphere 5.0, VMware introduced a new software FCoE (Fibre Channel over Ethernet) adapter. This means that if you have a NIC which supports partial FCoE offload, this adapter will allow you to access LUNs over FCoE without needing a dedicated HBA or third party FCoE drivers installed on the ESXi host. The FCoE Read more...

VDS Best Practices – Rack Server Deployment with Two 10 Gigabit adapters (Part 4 of 6)

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Rack Server with Two 10 Gigabit Ethernet network adapters The two 10 Gigabit Ethernet network adapters deployment model is becoming very common because of the benefits they provide through I/O consolidation. The key benefits include better utilization of I/O resources, simplified management, and reduced CAPEX and OPEX. While this deployment provides these benefits, there are Read more...

IBM's VASA Implementation for the XIV Storage Array

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IBM recently announced their first implementation of vSphere Storage APIs for Storage Awareness (VASA). At its most basic, VASA enables vCenter to see underlying storage capabilities. To learn more about VASA, please take a moment to read my previous posts on the subject here and here. What follows is a brief description of IBM's VASA Read more...

Nice vmkfstools feature for Extents

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Troubleshooting issues with extents has never been easy. If one extent member went offline, it has been difficult to find which physical LUN corresponds to the extent that went offline. vSphere 5.0 introduces the ability, via vmkfstools, to check which extent of a volume is offline. For example, here is a VMFS-5 volume I created Read more...