Hi, as I wrote, I don't want to install Hadoop etc. - I want just to use the Thrift API. The core of my question is how does get_indexed_slices function work.
I know that it must get all keys using equality expression firstly - but what about additional expressions? Does Cassandra fetch whole filtered rows, or just columns used in additional filtering expression? Thanks! Augi 2011/6/12 aaron morton <aa...@thelastpickle.com>: > Not exactly sure what you mean here, all data access is through the thrift > API unless you code java and embed cassandra in your app. > As well as Pig support there is also Hive support in brisk (which will also > have Pig support soon) http://www.datastax.com/products/brisk > Can you provide some more info on the use case ? Personally if you have a > read query you know you need to support, I would consider supporting it in > the data model without secondary indexes. > Cheers > > ----------------- > Aaron Morton > Freelance Cassandra Developer > @aaronmorton > http://www.thelastpickle.com > On 11 Jun 2011, at 19:23, Michal Augustýn wrote: > > Hi all, > > I'm thinking of get_indexed_slices function as a simple map-reduce job > (that just maps) - am I right? > > Well, I would like to be able to run simple queries on values but I > don't want to install Hadoop, write map-reduce jobs in Java (the whole > application is in C# and I don't want to introduce new development > stack - maybe Pig would help) and have some second interface to > Cassandra (in addition to Thrift). So secondary indexes seem to be > rescue for me. I would have just one indexed column that will have > day-timestamp value (~100k items per day) and the equality expression > for this column would be in each query (and I would add more ad-hoc > expressions). > Will this scenario work or is there some issue I could run in? > > Thanks! > > Augi > >
