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From Garren Smith <gar...@apache.org>
Subject Re: [DISCUSS] Implementing Mango Indexes for FoundationDB
Date Mon, 08 Apr 2019 13:21:40 GMT
On Tue, Apr 2, 2019 at 1:38 AM Alex Miller <alexmiller@apple.com.invalid>
wrote:

>
> > On Apr 1, 2019, at 2:21 AM, Will Holley <willholley@gmail.com> wrote:
> >
> > 5. I have a few concerns about the performance given we'll no longer be
> > able to push down filtering to the data storage tier. It sounds [1] like
> a
> > key thing will be the extent to which we can concurrently fetch/filter
> > non-overlapping key ranges from FDB - likely something that will come up
> in
> > relation to views as well. This gets a bit more fun when considering
> > multi-tenancy, and is perhaps something to stew on whilst getting
> something
> > functional together.
> >
> > Will
> >
> > [1]
> https://forums.foundationdb.org/t/secondary-indexing-approaches/792/4
>
> There is an open request to folk writing applications or layers that
> desire predicate pushdown to please add their use case and requirements to
> https://forums.foundationdb.org/t/feature-request-predicate-pushdown/954/2
> , to help guide what the eventual implementation of this feature will be.
> If someone wouldn’t mind adding what Mango would need or desire, it’d be
> much appreciated.


Thanks Alex, I've left a summary of our use case. As I mention in the post,
I think the use case that Ryan defines fits our use case pretty nicely as
well.

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