On 03/15/2013 01:20 PM, GGS (linux ha) wrote:

> Virtualization has a huge penalty on performance, specially
> at the IO level. At another place we do Xen and KVM with up to
> 40 VMs/server and when there is any kind of IO (disk specially) going
> on things slow down to a crawl.

I'm yet to find anything that can deal with i/o. I recently spent a
couple of weeks poking at ceph, it doesn't live up to the sales brochure
either... I expect if you can roll out a dedicated 10GBe network for
your iscsis you might get usable i/o speeds. :(

-- 
Dimitri Maziuk
Programmer/sysadmin
BioMagResBank, UW-Madison -- http://www.bmrb.wisc.edu

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