[ Cloud Computing ] Re: why virtualization?

Jan, you say:

"In a virtualized environments, with sound CPU scheduling, multi-core systems truly allow multiple workloads to consolidate gracefully on single servers."

Not quite since unfortunately today (still):

• as cores/cpu ratio increase performances go down, due to contention on the bus  & clock, etc. Dual-cores may perform globally better than 4+ cores.
• software licensing is a mess, e.g.
  
• Oracle is per core and highest clock are convenient (IBM pSeries may be cheaper than x86!!)
  
• VMware is per Processor, the more cores the cheaper.
  

In conclusion we still depend a lot from the Applications and cpu/mem load associated.

"Blade architectures are an order of magnitude more efficient than traditional 1-U boxes, particularly when it comes to sharing power supplies and cooling fans redundantly.  Unfortunately, they tend to be highly proprietary, but certainly less so than any viable alternative to off-the-shelf Taiwanese parts."

and also when it come to cost per unit and memory scalability the 1U servers are still the winners. In fact as you grow with the number you grow with the CAPEX and that's still the 1st hurdle to  overcome.

Ciao, Mauro



--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google
Groups "Cloud Computing" group.
To post to this group, send email to cloud-computing@googlegroups.com
To unsubscribe from this group, send email to
cloud-computing-unsubscribe@googlegroups.com
To post job listing, send email to jobs@cloudjobs.net (position title, employer and location in subject, description in message body) or visit http://www.cloudjobs.net
To submit your resume for cloud computing job bank, send it to resume@cloudjobs.net.
For more options, visit this group at
http://groups.google.ca/group/cloud-computing?hl=en?hl=en
Posting guidelines:
http://groups.google.ca/group/cloud-computing/web/frequently-asked-qu...
This group posts are licensed under a Creative Commons Attribution-Share Alike 3.0 United States License http://creativecommons.org/licenses/by-sa/3.0/us/
Group Members Meet up Calendar - http://groups.google.ca/group/cloud-computing/web/meet-up-calendar
-~----------~----~----~----~------~----~------~--~---