| |
|
 |
|
 |
|
|
|
| |
|
|
xen-users
RE: [Xen-users] XEN - networking and performance
Jeff Sturm wrote:
One of the traps we've run into when virtualizing moderately
I/O-heavy hosts, is not sizing our disk arrays right. Not in terms
of capacity (terabytes) but in spindles. If each physical host
normally has 4 dedicated disks, for example, virtualizing 8 of these
onto a domU attached to a disk array with 16 drives effectively cuts
that ratio from 4:1 down to 2:1. Latency goes up, throughput goes
down.
Not only that, but you also guarantee that the I/O is across
different areas of the disk (different partitions/logical volumes)
and so you also virtually guarantee a lot more seek activity.
--
Simon Hobson
Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed
author Gladys Hobson. Novels - poetry - short stories - ideal as
Christmas stocking fillers. Some available as e-books.
_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users
|
|
|
| |
|
Home