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From "Wido den Hollander (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CLOUDSTACK-8239) Add support for VirtIO-SCSI for KVM hypervisors
Date Wed, 11 Feb 2015 09:39:11 GMT

    [ https://issues.apache.org/jira/browse/CLOUDSTACK-8239?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14315895#comment-14315895
] 

Wido den Hollander commented on CLOUDSTACK-8239:
------------------------------------------------

All new Linux versions support virtio-scsi, so I think we can safely switch to virtio-scsi
for all new Linux Instances.

Quick check is that Ubuntu 14.04 and CentOS 7 both support it. So it shouldn't be a big problem
to change their XML defitinitions and choose VirtIO-SCSI for those guests.

> Add support for VirtIO-SCSI for KVM hypervisors
> -----------------------------------------------
>
>                 Key: CLOUDSTACK-8239
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-8239
>             Project: CloudStack
>          Issue Type: New Feature
>      Security Level: Public(Anyone can view this level - this is the default.) 
>          Components: KVM, Storage Controller
>    Affects Versions: 4.6.0
>         Environment: KVM
>            Reporter: Andrei Mikhailovsky
>            Assignee: Wido den Hollander
>            Priority: Critical
>              Labels: ceph, kvm, rbd, storage_drivers, virtio
>
> It would be nice to have support for virtio-scsi for KVM hypervisors.
> The reason for using virtio-scsi instead of virtio-blk would be increasing the number
of devices you can attach to a vm, have ability to use discard and reclaim unused blocks from
the backend storage like ceph rbd. There are also talks about having a greater performance
advantage as well.



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