Is this reproducable with an open source backend? ** Changed in: nova Status: New => Incomplete
** Also affects: cinder Importance: Undecided Status: New -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to OpenStack Compute (nova). https://bugs.launchpad.net/bugs/1433309 Title: Libvirt: Detaching volume from instance on host with many attached volumes is very slow Status in Cinder: New Status in OpenStack Compute (Nova): Incomplete Bug description: When many volumes are attached to instances on the same compute host (with multipath enabled), volume detach is very slow and get slower as more volumes are attached. For example: 1. compute1 is a compute node with instance1 and instance2. 2. instance1 has 10 volumes attached while instance2 has a single volume attached. 3. Issue a detach for the volume attached to instance2 4. Nova spends >20 minutes executing the 'multipath -ll' command for every device on the hypervisor 5. Finally the detach completes successfully The following log is output in n-cpu many, many times during the detach call. Repeated many times for each volume device. http://paste.openstack.org/show/192981/ Environment details: nova.conf virt driver [libvirt] iscsi_use_multipath = True vif_driver = nova.virt.libvirt.vif.LibvirtGenericVIFDriver inject_partition = -2 live_migration_uri = qemu+ssh://ameade@%s/system use_usb_tablet = False cpu_mode = none virt_type = kvm cinder.conf backend [eseries] volume_backend_name = eseries volume_driver = cinder.volume.drivers.netapp.common.NetAppDriver netapp_storage_family = eseries netapp_storage_protocol = iscsi netapp_server_hostname = localhost netapp_server_port = 8081 netapp_webservice_path = /devmgr/v2 netapp_controller_ips = 10.78.152.114,10.78.152.115 netapp_login = rw netapp_password = xx netapp_storage_pools = DDP use_multipath_for_image_xfer = True netapp_sa_password = password netapp_enable_multi_attach=True To manage notifications about this bug go to: https://bugs.launchpad.net/cinder/+bug/1433309/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : yahoo-eng-team@lists.launchpad.net Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp