With Composite Column Name, you can even have column composed of sore (int) and userid (uuid or whatever). Empty column value to avoid repeating user UUID.
2011/12/22 R. Verlangen <ro...@us2.nl>: > I would suggest you to create a CF with a single row (or multiple for > historical data) with a date as key (utf8, e.g. 2011-12-22) and multiple > columns for every user's score. The column (utf8) would then be the score + > something unique of the user (e.g. hex representation of the TimeUUID). The > value would be the TimeUUID of the user. > > By default columns will be sorted and you can perform a slice to get the top > 10. > > 2011/12/14 cbert...@libero.it <cbert...@libero.it> > >> Hi all, >> I'm using Cassandra in production for a small social network (~10.000 >> people). >> Now I have to assign some "credits" to each user operation (login, write >> post >> and so on) and then beeing capable of providing in each moment the top 10 >> of >> the most active users. I'm on Cassandra 0.7.6 I'd like to migrate to a new >> version in order to use Counters for the user points but ... what about >> the top >> 10? >> I was thinking about a specific ROW that always keeps the 10 most active >> users >> ... but I think it would be heavy (to write and to handle in thread-safe >> mode) >> ... can counters provide something like a "value ordered list"? >> >> Thanks for any help. >> Best regards, >> >> Carlo >> >> > -- sent from my Nokia 3210
