For queue approach you would use these commands and a key would contain a list. http://redis.io/commands#list most read commands are destructive, they will retrieve and remove value. There is one that can copy it into another key at the same time if you need to preserve the queue list, 201606011645_processed for example, etc.
> On May 30, 2016, at 1:17 PM, Daniela S <daniela_4...@gmx.at> wrote: > > 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
