On 11/08/2013 08:58 AM, Josh Durgin wrote:
On 11/08/2013 03:13 PM, james@xxxxxxxxxxxx wrote:
On 2013-11-08 03:20, Haomai Wang wrote:
On Fri, Nov 8, 2013 at 9:31 AM, Josh Durgin <josh.durgin@xxxxxxxxxxx>
wrote:
I just list commands below to help users to understand:
cinder qos-create high_read_low_write consumer="front-end"
read_iops_sec=1000 write_iops_sec=10
Does this have any normalisation of the IO units, for example to 8K or
something? In VMware we have similar controls for ages but they're not
useful, as a Windows server will through out 4MB IO's and skew all the
metrics.
I don't think it does any normalization, but you could have different
limits for different volume types, and use one volume type for windows
and one volume type for non-windows. This might not make sense for all
deployments, but it may be a usable workaround for that issue.
It is supported by Qemu. You can set both IOps, but also bandwidth for
read, write or total.
I don't know if OpenStack supports it though.
Josh
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