Logging chat messages

Guido Medina guido.medina at temetra.com
Mon Oct 22 05:16:52 EDT 2012

Don't overkill it with technology, you could use Riak with a simple 2i 
index (integer index YYYYMMDD for the message date so you can search day 
by day backward), and for the message sequence or identifier you could 
either user ANY SQL database sequence or a UUID generator.



On 22/10/12 10:04, Rapsey wrote:
> On Mon, Oct 22, 2012 at 10:29 AM, Shashwat Srivastava 
> <darklrd at gmail.com <mailto:darklrd at gmail.com>> wrote:
>     Now, each bucket would have conversation between two users or of a
>     room of a site. The conversation rate for (some) rooms is very
>     high, some 20,000 - 30,000 messages per hour. We
>     have observed that users usually don't access conversations past
>     one week. So, if a bucket has conversation of 3 years, then mostly
>     users would access the recent conversation upto a week or month.
>     Can riak handle this easily? Also, would riak use RAM wisely in
>     this scenario? Would it only keep keys and indexes, corresponding
>     to recent messages per bucket, in RAM?
> Leveldb backend should.
>     Finally, what is the best approach for creating keys in a bucket?
>     Earlier, I was planning to use timestamp (in milliseconds). But in
>     a room there can be multiple messages at the same time. As I
>     understand I cannot have a unique incremental message id per
>     bucket (as riak has write capability in all nodes in a cluster so
>     consistency is not guareented). Please correct me if I am wrong.
>     One other way could be to let riak generate key and I use
>     timestamp as a secondary index. But this seems to be a bad design.
>     Also, what would be the best way to achieve pagination for this
>     use case?
> You could use redis for incremental id's.
> Sergej
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