Why don't you use map to store write time as value and data as key? Le 15 nov. 2014 00:24, "Kevin Burton" <bur...@spinn3r.com> a écrit :
> I’m trying to build a histograph in CQL for various records. I’d like to > keep a max of ten items or items with a TTL. but if there are too many > items, I’d like to trim it so the max number of records is about 20. > > So if I exceed 20, I need to removed the oldest records. > > I’m using a set append so each member of the set has a different write > time and ttl. > > But I can’t figure out how to compute the writetime() of each set member > since the CQL write time only takes a column reference. > > Any advice? Seems like I’m an edge case. > > Plan B is to upgrade everything to 2.1 and I can use custom datatypes and > just store the write times myself, but that takes a while. > > -- > > Founder/CEO Spinn3r.com > Location: *San Francisco, CA* > blog: http://burtonator.wordpress.com > … or check out my Google+ profile > <https://plus.google.com/102718274791889610666/posts> > <http://spinn3r.com> > >
