[openstack-dev] [nova][cinder] Schedule Instances according to Local disk based Volume?
Joshua Harlow
harlowja at fastmail.com
Tue Sep 27 03:39:32 UTC 2016
Huang Zhiteng wrote:
>
>
> On Tue, Sep 27, 2016 at 12:00 AM, Joshua Harlow <harlowja at fastmail.com
> <mailto:harlowja at fastmail.com>> wrote:
>
> Huang Zhiteng wrote:
>
>
> On Mon, Sep 26, 2016 at 12:05 PM, Joshua Harlow
> <harlowja at fastmail.com <mailto:harlowja at fastmail.com>
> <mailto:harlowja at fastmail.com <mailto:harlowja at fastmail.com>>>
> wrote:
>
> Huang Zhiteng wrote:
>
> In eBay, we did some inhouse change to Nova so that our
> big data
> type of
> use case can have physical disks as ephemeral disk for
> this type of
> flavors. It works well so far. My 2 cents.
>
>
> Is there a published patch (or patchset) anywhere that
> people can
> look at for said in-house changes?
>
>
> Unfortunately no, but I think we can publish it if there are enough
> interests. However, I don't think that can be easily adopted onto
> upstream Nova since it depends on other in-house changes we've
> done to Nova.
>
>
> Is there any blog, or other that explains the full bunch of changes
> that ebay has done (u got me curious)?
>
> The nice thing about OSS is that if u just get the patchsets out
> (even to github or somewhere), those patches may trigger things to
> change to match your usecase better just by the nature of people
> being able to read them; but if they are never put out there, then
> well ya, it's a little hard to get anything to change.
>
>
> Anything stopping a full release of all in-house changes?
>
> Even if they are not 'super great quality' it really doesn't matter :)
>
> Apology for sidetracking the topic a bit. While we encourage our
> engineers to embrace community and open source, I think we didn't do a
> good job to actually emphasize that. 'Time To Market' is another factor,
> usually a feature requirement becomes deployed service in 2,3 sprint
> (4~6 weeks), but you know how much can be done in same amount of time in
> community, especially with Nova. :)
Ya, sorry for side-tracking,
Overall yes I do know getting changes done in upstream is not a 4-6 week
process (though maybe someday it could be). In general I don't want to
turn this into a rant, and thankfully I think there is a decent LWN
article about this kind of situation already. You might like it :)
https://lwn.net/Articles/647524/ (replace embedded linux/kernel in this
with openstack and imho it's equally useful/relevant).
-Josh
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