Re: Which Kernel and QEMU/libvirt version doyourecommend on Ubuntu 12.04 and Centos?

[Neil Levine <neil.levine@xxxxxxxxxxx>]

Yes, use the async one. We will be getting rid of the non-async one soon.

The default Qemu packages in 6.4 doesn't link to librbd whereas these custom packages have been built explicitly with the link.

Hoping to announce some positive news soon about why this should become much simpler in 6.5 and up...

N

On Thu, Aug 1, 2013 at 9:09 AM, Da Chun <ngugc@xxxxxx> wrote:

Neil,

What's the difference between your custom qemu packages and the official ones?

There are two kinds of packages in it:

qemu-kvm-0.12.1.2-2.355.el6.2.cuttlefish.async.x86_64.rpm

qemu-kvm-0.12.1.2-2.355.el6.2.cuttlefish.x86_64.rpm

What's the difference between them? Does the "async" version support aio flush?

------------------ Original ------------------

From:  "Neil Levine"<neil.levine@xxxxxxxxxxx>;

Date:  Thu, Aug 1, 2013 11:13 AM

To:  "Da Chun"<ngugc@xxxxxx>;

Cc:  "ceph-users"<ceph-users@xxxxxxxxxxxxxx>;

Subject:  Re: Which Kernel and QEMU/libvirt version doyourecommend on Ubuntu 12.04 and Centos?

Yes, default version should work.

Neil

On Wed, Jul 31, 2013 at 7:11 PM, Da Chun <ngugc@xxxxxx> wrote:

Thanks! Neil and Wido.

Neil, what about the livirt version on CentOS 6.4? Just use the official release?

------------------ Original ------------------

From: "Neil Levine"<neil.levine@xxxxxxxxxxx>;

Date: Thu, Aug 1, 2013 05:53 AM

To: "Da Chun"<ngugc@xxxxxx>;

Cc: "ceph-users"<ceph-users@xxxxxxxxxxxxxx>;

Subject: Re: Which Kernel and QEMU/libvirt version do yourecommend on Ubuntu 12.04 and Centos?

For CentOS 6.4, we have custom qemu packages available at http://ceph.com/packages/ceph-extras/rpm/centos6 which will provide RBD support.

You will need to install a newer kernel than the one which ships by default (2.6.32) to use the cephfs or krbd drivers. Any version above 3.x should be sufficient.

For Ubuntu 12.04, as per Wido's comments, use the Ubuntu Cloud Archive to get the latest version of all necessary packages.

N

On Wed, Jul 31, 2013 at 7:18 AM, Da Chun <ngugc@xxxxxx> wrote:

Hi List,

I want to deploy two ceph clusters on ubuntu 12.04 and centos 6.4 separately, and test cephfs, krbd, and librbd.

Which Kernel and QEMU/libvirt version do you recommend? Any specific patches which I should apply manually?

Thanks for your time!

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