[one-users] infiniband

Tue May 8 21:16:54 PDT 2012

Hi Jamie

Thanks for the info, I am creating a readme and cleaning up the driver
scripts and will be uploading them shortly.

Shank

On Tue, May 8, 2012 at 9:47 AM, Jaime Melis <jmelis at opennebula.org> wrote:

> Hi Shankhadeep,
>
> I think the community wiki site is the best place to upload these drivers
> to:
> http://wiki.opennebula.org/
>
> It's open to registration let me know if you run into any issues.
>
> About the blog post, our community manager will send you your login info
> in a PM.
>
> Thanks!
>
> Cheers,
> Jaime
>
>
> On Mon, May 7, 2012 at 7:42 PM, Shankhadeep Shome <shank15217 at gmail.com>wrote:
>
>> Sure, where and how do I do it? I noticed that you have a community wiki
>> site. Do i upload the driver and make an entry there?
>>
>> Shankhadeep
>>
>>
>> On Mon, May 7, 2012 at 11:54 AM, Jaime Melis <jmelis at opennebula.org>wrote:
>>
>>> Hello Shankhadeep,
>>>
>>> that sounds really nice. Would you be interested in contributing your
>>> code to OpenNebula's ecosystem and/or publishing an entry in opennebula's
>>> blog?
>>>
>>> Regards,
>>> Jaime
>>>
>>>
>>> On Sun, May 6, 2012 at 5:39 AM, Shankhadeep Shome <shank15217 at gmail.com>wrote:
>>>
>>>>
>>>>
>>>> On Sat, May 5, 2012 at 11:38 PM, Shankhadeep Shome <
>>>> shank15217 at gmail.com> wrote:
>>>>
>>>>> Hi Chris
>>>>>
>>>>> We have a solution we are using on Oracle Exalogic hardware (we are
>>>>> using the bare metal boxes and gateway switches). I think I understand the
>>>>> requirement, IB accessible storage from VMs is possible however its a bit
>>>>> convoluted. Our solution was to create a one-to-one NAT from the VMs to the
>>>>> IB IPoIB network. This allows the VMs to mount storage natively over the IB
>>>>> network. The performance is pretty good, about 9Gbps per node with 64k MTU
>>>>> sizes.  We created an open nebula driver for this and I'm happy to share it
>>>>> with the community. The driver handles VM migrations by enabling/diabling
>>>>> ip aliases on the host and can also be used to manipulate iptable rules on
>>>>> source and destination when open nebula moves VMs around.
>>>>>
>>>>> Shankhadeep
>>>>>
>>>>>
>>>>> On Sat, May 5, 2012 at 5:42 PM, Chris Barry <cbarry at rjmetrics.com>wrote:
>>>>>
>>>>>> Reading more, I see that the available methods for block store are
>>>>>> iSCSI, and that the LUNS are attached to the host. From there, a symlink
>>>>>> tree exposes the target to the guest in a predictable way on every host.
>>>>>>
>>>>>> So then to modify my question a bit, are all LUNs attached to all
>>>>>> hosts simultaneously? Or does the attachment only happen when a migration
>>>>>> is to occur? Also, is the LUN put into a read-only mode or something during
>>>>>> migration on the original host to protect the data? Or, must a clustering
>>>>>> filesystem be employed?
>>>>>>
>>>>>> Guess I have a lot to read :)
>>>>>>
>>>>>> Thanks
>>>>>> -C
>>>>>>
>>>>>>
>>>>>> On Sat, May 5, 2012 at 5:23 PM, Chris Barry <cbarry at rjmetrics.com>wrote:
>>>>>>
>>>>>>> Hi Gubda,
>>>>>>>
>>>>>>> Thank you for replying. My goal was to use a single shared iso image
>>>>>>> to boot from, and use an in-memory minimal linux on each node that had no
>>>>>>> 'disk' at all, then to mount logical data volume(s) from a centralized
>>>>>>> storage system. Perhaps that is outside the scope of opennebula's design
>>>>>>> goals, and may not be possible  - I'm just now investigating it.
>>>>>>>
>>>>>>> I see you are using NFS, but my desire is to use block storage
>>>>>>> instead, ideally LVM, and not incur the performance penalties of IPoIB. It
>>>>>>> does sound simple though, and that's always good. Do you have any
>>>>>>> performance data on that setup in terms of IOPs and/or MB/s write speeds?
>>>>>>> It does sound interesting.
>>>>>>>
>>>>>>> Thanks again,
>>>>>>> -C
>>>>>>>
>>>>>>>
>>>>>>> On Sat, May 5, 2012 at 4:01 PM, Guba Sándor <gubasanyi at gmail.com>wrote:
>>>>>>>
>>>>>>>>  Hi
>>>>>>>>
>>>>>>>> I'm using InfiniBand to make shared storage. My setup is simple:
>>>>>>>> the opennebula installdir is shared on NFS with the worker nodes.
>>>>>>>>
>>>>>>>> - I don't understand what you mean on shared image. There will be a
>>>>>>>> copy (or symlink if the image is persistent) on the NFS host and that is
>>>>>>>> that the hypervisor will use over the network. Live migrate is available
>>>>>>>> beacuse you don't move the image only another host will use it from the
>>>>>>>> same spot. With my linux images I have about 30s delay when livemigrate.
>>>>>>>> You can use qcow2 driver for shared image.
>>>>>>>>
>>>>>>>> - I don't understant exactly what you mean on "guest unaware". If
>>>>>>>> you mean storage - host connection it has nothing to do with nebula. You
>>>>>>>> can use any shared filesystem. NFS uses IPoIB connection.
>>>>>>>>
>>>>>>>> 2012-05-05 19:01 keltezéssel, Chris Barry írta:
>>>>>>>>
>>>>>>>> Greetings,
>>>>>>>>
>>>>>>>> I'm interested in hearing user accounts about using infiniband as
>>>>>>>> the storage interconnect with OpenNebula if anyone has any thoughts to
>>>>>>>> share. Specifically about:
>>>>>>>> * using a shared image and live migrating it (e.g. no copying of
>>>>>>>> images).
>>>>>>>> * is the guest unaware of the infiniband or is it running IB
>>>>>>>> drivers?
>>>>>>>> * does the host expose the volumes to the guest, or does the guest
>>>>>>>> connect directly?
>>>>>>>> * I'd like to avoid iSCSI over IPoIB if possible.
>>>>>>>> * clustering filesystem/LVM requirements.
>>>>>>>> * file-based vdisk or logical volume usage?
>>>>>>>>
>>>>>>>> Anything, an experiences at all will be helpful.
>>>>>>>>
>>>>>>>> Thanks
>>>>>>>> Christopher
>>>>>>>>
>>>>>>>>
>>>>>>>>
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>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
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>>>>>>>>
>>>>>>>
>>>>>>
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>>>>>
>>>>
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>>>
>>>
>>> --
>>> Jaime Melis
>>> Project Engineer
>>> OpenNebula - The Open Source Toolkit for Cloud Computing
>>> www.OpenNebula.org | jmelis at opennebula.org
>>>
>>
>>
>
>
> --
> Jaime Melis
> Project Engineer
> OpenNebula - The Open Source Toolkit for Cloud Computing
> www.OpenNebula.org | jmelis at opennebula.org
>
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