Aw: Re: Pull from Redis

[Daniela S]

I have to pull the entries and to add a specific value to every entry. This value is stored in another database and therefore I would like to make the join. based on some conditions, in Storm. I need this value to build the sum, as the entries do not contain any information for the sum. 

 

What would be very few keys? 

 

Thank you and regards,

Daniela

 

Gesendet: Montag, 30. Mai 2016 um 20:11 Uhr
Von: "Yuri Kostine" <kost...@gmail.com>
An: user@storm.apache.org
Betreff: Re: Pull from Redis

 

Do you pull entries only to sum them up? Why not keep a running total in redis in a time stamped key by minute? Generally speaking redis is not great for pulling all keys unless there are very few keys. 

On May 30, 2016, at 12:49 PM, Daniela S <daniela_4...@gmx.at> wrote:
 

Hi

 

I have a topology that stores entries in Redis. Now I would like to pull all entries from Redis every minute or as soon as a value has changed. How can I do that? Can I add another bolt to my topology for this task or do I have to use a spout or even a new topology? I would like to build a sum over all entries every minute. Do you have any advice for that?

 

Thank you in advance.

 

Regards,

Daniela