[Twg] LNET channel bonding

[John Carrier]

Liang,

Do you think the HLD provides enough guidance that a vendor could respond to an RFP to design _and_ implement the feature?  Or do we still need to design and implement separately, as has been proposed at our last meeting?

Thanks,

--jc

From: Liang Zhen [mailto:liang at whamcloud.com]
Sent: Wednesday, September 26, 2012 12:12 AM
To: John Carrier
Cc: twg at lists.opensfs.org; discuss at lists.opensfs.org
Subject: Re: [Twg] LNET channel bonding

Hi John,

I think most of the design is still valid, but I wouldn't suggest to skip the design phase for a few reasons:
- it's a HLD, not a DLD. OpenSFS project process has both HLD and DLD in design phase.
- the HLD described this feature as a single project, I'm wondering if it's possible to have multiple phases for it (or sub-projects), which will make it more manageable.
- it's worked out three years ago and core LNet has been changed a lot, it could be worth taking time to review it and consider if there's any new complexity or issue based on the latest LNet, i.e: Any potential SMP performance issue if adding this feature.

Regards
Liang

On Sep 21, 2012, at 4:38 AM, John Carrier wrote:


Hi all,

Since LNET channel bonding has made it to the TWG's short list of requirements for 2013, I would like to remind the community that Cray already funded the design of such a requirement in 2009.  The high level design document is available here:
http://wiki.lustre.org/images/e/ee/Channel_Bonding_06_15_09.pdf

Is this design still valid?  What else would need to be done?  If the design still looks good, then I suggest that the RFP for this requirement should move directly to implementation and avoid the cost of another design phase.

Please post comments to the reflectors.

Thanks,

--jc
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