accumulo-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Geoffry Roberts <threadedb...@gmail.com>
Subject Re: Triggers or their equivalent
Date Thu, 21 Dec 2017 16:14:15 GMT
I was un familiar with fluo. Its notifications might be what I need.

Thanks

On Wed, Dec 20, 2017 at 1:31 PM, Keith Turner <keith@deenlo.com> wrote:

> On Wed, Dec 20, 2017 at 12:32 PM, Josh Elser <elserj@apache.org> wrote:
> > Accumulo doesn't provide any mechanism to build a traditional trigger
> like a
> > traditional RDBMS or HBase. Can you share more details about what exactly
> > you want this trigger to do? It's possible we can suggest an alternate
> > approach which would fit naturally.
> >
> > If your trigger is causing other updates to Accumulo or creating some
> remote
> > I/O operation, the general recommendation would be to handle this at a
> > higher-level instead of in Accumulo itself. For generating "follow-on"
> > updates in Accumulo from a single update, Apache Fluo is a good starting
> > point. There are many other tools which you could use to build your own
> kind
> > of system, but this is very dependent on your actual requirements.
>
> Fluo is a good solution if you would like to join existing data with
> new data and update a query table based on the results of the joins.
> If no joins are required, something like Kafka may be a good solution.
> Insert new data into Kafka and have a consumer group that inserts into
> Accumulo.  Have other consumer groups for the actions you want to
> Accumulo triggers to take.
>
>
> >
> >
> > On 12/20/17 11:43 AM, Geoffry Roberts wrote:
> >>
> >> I have need of a trigger mechanism in Accumulo.  My first impulse was to
> >> use an iterator, but the documentation advised against this.  I think I
> can
> >> see why.
> >>
> >> Is there a best practice way of accomplishing this?  Is there any plan
> to
> >> add such functionality in the future?
> >>
> >> --
> >> There are ways and there are ways,
> >>
> >> Geoffry Roberts
>



-- 
There are ways and there are ways,

Geoffry Roberts

Mime
View raw message