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Posted to user@cassandra.apache.org by Jan Algermissen <ja...@nordsc.com> on 2014/10/12 22:25:20 UTC
Re: Exploring Queueing
Hi all,
thanks again for the comments.
I have created an (improved?) design, this time using dedicated consumers per shard and time-based row expire, hence without immediate deletes.
https://github.com/algermissen/cassandra-ruby-sharded-workers
As before, comments are welcome.
Jan
On 06 Oct 2014, at 22:50, Robert Coli <rc...@eventbrite.com> wrote:
> On Mon, Oct 6, 2014 at 1:40 PM, Jan Algermissen <ja...@nordsc.com> wrote:
> Hmm, I was under the impression that issues with old queue state disappear after gc_grace_seconds and that the goal primarily is to keep the rows ‘short’ enough to achieve a tombstones read performance impact that one can live with in a given use case.
>
> The design I pasted does a link to does not include specifics regarding pruning old history. Yes, you can just delete it, if your system design doesn't require replay from the start.
>
> =Rob
>
Re: Exploring Queueing
Posted by DuyHai Doan <do...@gmail.com>.
Excellent initiative. I'll have a look tomorrow and give some feedbacks
On Sun, Oct 12, 2014 at 10:25 PM, Jan Algermissen <
jan.algermissen@nordsc.com> wrote:
> Hi all,
>
> thanks again for the comments.
>
> I have created an (improved?) design, this time using dedicated consumers
> per shard and time-based row expire, hence without immediate deletes.
>
> https://github.com/algermissen/cassandra-ruby-sharded-workers
>
> As before, comments are welcome.
>
> Jan
>
> On 06 Oct 2014, at 22:50, Robert Coli <rc...@eventbrite.com> wrote:
>
> > On Mon, Oct 6, 2014 at 1:40 PM, Jan Algermissen <
> jan.algermissen@nordsc.com> wrote:
> > Hmm, I was under the impression that issues with old queue state
> disappear after gc_grace_seconds and that the goal primarily is to keep the
> rows ‘short’ enough to achieve a tombstones read performance impact that
> one can live with in a given use case.
> >
> > The design I pasted does a link to does not include specifics regarding
> pruning old history. Yes, you can just delete it, if your system design
> doesn't require replay from the start.
> >
> > =Rob
> >
>
>