** Also affects: os-win
Importance: Undecided
Status: New
** Changed in: os-win
Assignee: (unassigned) => Lucian Petrut (petrutlucian94)
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https://bugs.launchpad.net/bugs/1372827
Title:
Improve efficiency of Hyper-V attaching iSCSI volumes
Status in OpenStack Compute (nova):
Triaged
Status in os-win:
In Progress
Bug description:
The Hyper-V driver in Nova is not very efficient attaching Cinder
volumes to the VMs.
It always tries to refresh the entire connection to the iSCSI target:
https://github.com/openstack/nova/blob/master/nova/virt/hyperv/volumeutilsv2.py#L87
This is a time consuming task that also blocks additional calls during
this time.
The class should be refactored to work in a more efficient way.
Calling the 'Update' method everytime a volume is attached should be
replaced by a more intelligent mechanism. As reported in
https://bugs.launchpad.net/nova/+bug/1372823 a call to
'self._conn_storage.query("SELECT * FROM MSFT_iSCSISessionToDisk")'
could help.
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