On Virtualization

This is going to be a summary of the posts I read in cio, which BTW, are very nice reads:

  • Just because some technology is hot and cool ( 🙂 ), does not mean I am going to use it, says one CIO
  • How to connect physical NICs to virtual switches? Any best practices/recommendations? One guy ponders
  • The end game is management of virtual infrastructure, not hypervisors, says another.

    VMware should continue to integrate its products deeply with its partners’ offerings and leverage their sales channels—a kind of “unite and overcome” strategy. “VMware’s best chance is not to go it alone,”

  • How I/O bottleneck is posing limits on what can be virtualized and what people are doing to solve that problem?
  • One guy says “virtualization is netting him 50 to 60 percent utilization rates, compared to 10 to 15 percent utilization rates on standard servers”. He also says “the company’s IT provisioning has improved by a factor of 65 percent, changing from weeks to days”.
  • A survey on virtualization adoption says:
    • The order of preference of adapting virtualization are: cost cutting with server consolidation, improve disaster recovery, fast provisioning, competitive advantage
    • Politial challenges are as important as technical challenges
    • Balancing workloads without sacrificing performance is the biggest challenge
    • They are not paying enough attention to integrating teams across IT but focusing on delivery
  • Transplace braved and virtualized almost all of their servers when virtualization was relatively new. However, they would still leave the I/O intensive SQL and Exchange server on physical boxes. One advantage, though, they had is that the software is developed in-house so they know how to tune it and what it needs
  • A related note on software licensing says SAP’s policy is good – it licenses based on number of users, not on number of physical/virtual resources
  • On Citrix buying Xen, one guy says, “a rivalry between VMware and Citrix can only be good news, since rivalry equals faster product innovation and more pressure on pricing and support quality”. On having multi-vendor solutions in the data center, he feels, ” Managing less complexity costs less. And the more you buy from one vendor, the better your potential discount. Today, she says, many companies are buying “good enough” functionality from a single virtualization vendor as opposed to best-of-breed functionality from many vendors to get cost savings”
  • David Siles says on of the advantages of having thin clients (virtualized desktops) is security: “We had a couple laptops stolen out of police cars,” Siles says. “Now [with the virtualized thin clients], you essentially just lose a dumb terminal.”. It is also a nice read on how people are benefiting from virtualizing their data centers – better server utilization, server licensing fees, server renewal costs, power saving, IT staffing reduction etc. etc. One of the quotes go “IDC says that there’s $140 billion in excess server capacity sitting around worldwide right now.”. That is too much!
  • There is also a nice article on why we need tools to manage the virtual environment and how different players are gearing up to it.
  • Why storage virtualization matters, for the services and flexibility it offers.
  • Some gotchas of virtualizing IT environments
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