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TECHNOLOGIES
Includes iSCSI, Fibre Channel or FC, InfiniBand or IB, SMI-S, RDMA over IP, FCoE, CEE, SAS, SCSI, NPIV, SSD.

All technologies relating to storage and servers are covered in this section. Taneja Group analysts have deep technology and business backgrounds and several have participated in the development of several of these technologies. We take pride in explaining complex technologies in a simple enough manner for IT, the press community and the industry at large to understand.
Hypervisor Shootout: Maximizing Workload Density in the Virtualization Platform (Report)
Twice in 2009, Taneja Group benchmarked the performance of the leading hypervisor platforms, with an eye to understanding which offered the best virtual machine (VM) densities, and we are pleased to update our findings in this new Technology Validation report. Our testing again focused on VM Density, which is our measure of the number of VMs that can run simultaneously—executing a well-defined set of consistent application workloads—on a single hypervisor instance without disruptive performance impact (service-level breach). This time we expanded our testing to include the Red Hat Enterprise Linux 5.5 Kernel-Based Virtual Machine (RHEL 5.5 KVM) in addition to the latest available generation of vendor hypervisors: VMware vSphere 4.1 (ESXi 4.1), Microsoft Hyper-V R2 (Hyper-V) and Citrix XenServer 5.6 (XenServer).
Aug 26, 2010

Increase IT Performance from the Enterprise to the Cloud with WAN Optimization (Profile)
In our 2005 report on WAN optimization, we examined Riverbed’s unique and pioneering technology. Five years later, in the largest datacenters and most complex networks, Riverbed accelerates the greatest number of applications and protocols with the broadest range of optimization appliances and software in the industry. In this updated report, we take a fresh look at the role WAN optimization plays in today’s highly distributed datacenters and cloud computing architectures. Massive consolidation and data mobility, enabled by virtualization, have radically altered how we build servers, design applications, and deploy storage for the emerging “cloud” decade, when IT performance will be constrained, more than ever, by network performance.
Jun 16, 2010

How to Improve Disaster Recovery for the Enterprise:Advanced Replication Powered by WAN Optimization (Profile)
In this profile we examine the business and technology trends that complicate and increase the cost of enterprise-wide DR planning, and we summarize the proven benefits of disk-to-disk backup and replication technologies. We then dive deeper, and explore the critical role WAN optimization plays in unlocking DR efficiencies when deployed along with these data protection solutions. WAN optimization enables the enterprise to do more with its current network capacity—more frequent and faster backups and replication, plus faster recovery—while leveraging new capacity quickly and efficiently. We conclude that a WAN optimization solution, when combined with advanced replication technologies, delivers remarkable flexibility, performance, and cost benefits for multi-datacenter enterprise disaster recovery.
Jan 20, 2010

Evaluating the ESX4 Hypervisor and VM Density Advantage (Report)
In this Technology Validation, Taneja Group reviews the effective performance of VMware ESX 4, Hyper-V R2 (RC) and XenServer 5.5 hypervisors. Based on our hands-on testing, VMware's ESX4 hypervisor continues to carry a marked advantage in VM density - the number of guest VMs a hypervisor can effectively host - versus the competition. Our conclusion, VMware has a VM density advantage of 1.8:1 versus the competition, or can effectively virtualize 80% more guests, even under what we think are conditions representing aggressive workloads. As we've reviewed before, this advantage translates into a lower total cost of acquisition for the VMware virtual infrastructure, making VMware as much as 5% to 29% cheaper than the competition.
Sep 11, 2009

The True Cost of Server Virtualization Solutions (Report)
In this Technology Validation, Taneja Group reviews the effective performance of the Hyper-V and ESXi hypervisors. Based on their performance, we then review the total cost of acquiring Microsoft Hyper-V plus System Center and VMware Infrastructure 3. Based on our findings, VMware wins, with a cheaper cost of acquisition that flies in the face of common misperceptions. VMware has an effective VM density at least 1.5:1 times greater than Microsoft Hyper-V, and comes out ahead in purchase cost by 5% to 29% when compared to Microsoft.
Apr 23, 2009

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