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On 7 Nov 2013, at 5:10 pm, hzguanqiang at corp.netease.com wrote:

> Hi guys,
>  
> In Folsom version, availability-zone info is stored in compute_nodes db table, and so can be parsed by JsonFilter.
> I can use JsonFilter to choose which(or except which) availability-zones to build my instance.
>  
> But in Havana version, availability-zone info is stored in aggregatemetadata, and so JsonFilter seems can not filter
> the proper availatiliby-zones as the way in Folsom version.
>  
> So Is there any other existed resolution in H version that can satisfy my demand?

You can use the AvailabilityZoneFilter for this.

Cheers,
Sam