[Gluster-users] GlusterFS 3.1 on Amazon EC2 Questions

[Joshua Saayman]

Thanks Craig, I posted your answers to my blog.

On Fri, Oct 22, 2010 at 4:04 PM, Craig Carl <craig at gluster.com> wrote:

> Joshua -
>    Thanks for the great write-up! To answer Gart's questions -
>
> 1. Ideally you shouldn't have any data on the devices you use for new
> Gluster volumes, we don't test that extensively. It will generally work, the
> self heal process will replicate & distribute the files as necessary, on
> first access. You can kick the self heal process off manually by running 'find
> . | xargs stat' at the top of the Gluster mount point.
>
> 2. You can read from the back end, all writes should go through the Gluster
> mount point.
>
> 3. If I understand the question, he is asking if a clone or snapshot of
> each AMI in the cluster is an effective way to backup Gluster? If so then
> yes, you would want to try and snap each image as close to the same time as
> possible.
>
> Please let me know if you, or any of your readers have any other questions.
>
>
> Thanks,
>
> Craig
>
> -->
> Craig Carl
> Senior Systems Engineer; Gluster, Inc.
> Cell - (408) 829-9953 (California, USA)
> Office - (408) 770-1884
> Gtalk - craig.carl at gmail.com
> Twitter - @gluster
> Installing Gluster Storage Platform, the movie!<http://www.youtube.com/user/GlusterStorage>
> http://rackerhacker.com/2010/08/11/one-month-with-glusterfs-in-production/
>
>
>
> ------------------------------
> *From: *"Joshua Saayman" <joshua at saayman.me>
> *To: *gluster-users at gluster.org
> *Sent: *Friday, October 22, 2010 6:05:24 AM
> *Subject: *[Gluster-users] GlusterFS 3.1 on Amazon EC2 Questions
>
>
> I'll appreciate help with the following questions by Gart on my blog
> (http://goo.gl/8eKn)
>
> Thanks
> Joshua
>
> ----
> Thanks for this accessibly straightforward series. A couple basic
> questions about the way gluster works:
>
> 1) If I do this exercise -exactly- as you have done, but one of the
> instances EBS volume already has files on it, what happens? Will it
> immediately replicate to the other? Will the gluster daemon lazily
> replicate? Do I have to call 'rebalance' to trigger the replication?
>
> 2) Must I perform all file access through the client mount in order to
> have integrity? Or can I read and write to the directories that are
> pointed to by the volume.
>
> 3) One of the finest aspects of AWS is AMI creation. Can I create an
> AMI based on these servers as a way to back up both the server state
> and the file volumes?
> ----
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