[one-users] Distributed storage, local copy

[Frédéric Dreier]

Hi Marshall,

It all depends on how you will use you cloud.

For example in the last setup I worked on we tried distributed
storage. But we just hit the IOPS maximum of our storage (see IOPS on
wikipedia for more info). It is due to the fact that we have a lot of
VM and no SATA / SAS / iSCSI with or without RAID was able to provide
the number of IOPS we needed. Result was : very slow disk operations
in VM (apt-get upgrade could last hours). Some smart guys just tune
the whole with a centralized NFS (Openindiana, ZFS, RAMDISK + extra
DDRDRIVE) and now it rocks.

Good luck,

Frederic







2012/3/13 Marshall Grillos <mgrillos at optimalpath.com>:
> We are planning an OpenNebula deployment for a private cloud setup.
>
>
>
> I recently read an article on the opennebula blog on storage:
> http://blog.opennebula.org/?p=2187
>
>
>
> This article discusses a “Distributed storage local copy” solution that
> seems to scale the best.  However it does not contain any information or
> hints on how to configure this type of setup.  I have a few questions:
>
>
>
> 1)      Will this setup allow live migrations?
>
> 2)      Can someone point me to some configuration examples?
>
> 3)      Does this require the VMWare hypervisor (we were looking at KVM or
> XEN deployment)?
>
>
>
> Does anyone know what the general architecture would look like?  We were
> planning on attaching a large storage array to the OpenNebula controller to
> house VM images and setting up enough storage on each node to house running
> images to reduce network latency.  I found this article useful in that it
> afforded faster deployment times than the traditional Non-shared filesystem.
>
>
>
> Any tips/information on how to test this deployment would be great.
>
>
>
> Thanks,
>
> Marshall
>
>
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