On Tue, Dec 6, 2011 at 3:00 AM, Alon
Zeltser
<alonz@emet.co.il>
wrote:
Hi all
i have a situation of a virtual machine running on esx 4.0
over iscsi
this machine (while the user is running his stuff) is using
a lot of
i/o on a very small netapp controller (2020) with only 5 data
disks aggr
and getting very bad latency and eventually getting a lun
reset errors
and the machine freeze for a few minutes
i have increased the timeouts from the windows side but it
doesn't seems
to help
this application don't need so much i/o and can be run a 5.4k
disk on an
old laptop but given the resources of netapp it uses them to
the fullest
it is important to mention that this application is running
over MSSQL
db and the i/o problem goes to rdm lun
my question: is there a way to limit the i/o of this machine
from either
netapp side /vmware side / windows side / network side
i'm aweare of vmware storage i/o control but this is only
supported in
vsphere 4.1 and an upgrade is not an options right now
i'm also aware of flexshare from the netapp side but i don't
think
giving low priority to this volume will help in this case
is there other way you can think of to limit the i/o goes from
vmware
virtual machine through iscsi to an rdm lun or his hosting
volume?
thank you
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