>From what I understand, wide rows have quite a bit of overhead, especially if you are picking columns that are far apart from each other for a given row.
This post by Aaron Morton was quite good at explaining this issue http://thelastpickle.com/2011/07/04/Cassandra-Query-Plans/ -Phil On Thu, Jul 5, 2012 at 12:17 PM, Oleg Dulin <oleg.du...@gmail.com> wrote: > Here is my flow: > > One process write a really wide row (250K+ supercolumns, each one with 5 > subcolumns, for the total of 1K or so per supercolumn) > > Second process comes in literally 2-3 seconds later and starts reading > from it. > > My observation is that nothing good happens. It is ridiculously slow to > read. It seems that if I wait long enough, the reads from that row will be > much faster. > > Could someone enlighten me as to what exactly happens when I do this ? > > Regards, > Oleg > > >
