Check out our post on how to use TWCS before 3.0. http://thelastpickle.com/blog/2017/01/10/twcs-part2.html
On Sun, Jan 29, 2017 at 11:20 AM John Sanda <john.sa...@gmail.com> wrote: > It was with STCS. It was on a 2.x version before TWCS was available. > > On Sun, Jan 29, 2017 at 10:58 AM DuyHai Doan <doanduy...@gmail.com> wrote: > > Did you get this Overwhelming tombstonne behavior with STCS or with TWCS ? > > If you're using DTCS, beware of its weird behavior and tricky > configuration. > > On Sun, Jan 29, 2017 at 3:52 PM, John Sanda <john.sa...@gmail.com> wrote: > > Your partitioning key is text. If you have multiple entries per id you are > likely hitting older cells that have expired. Descending only affects how > the data is stored on disk, if you have to read the whole partition to find > whichever time you are querying for you could potentially hit tombstones in > other SSTables that contain the same "id". As mentioned previously, you > need to add a time bucket to your partitioning key and definitely use > DTCS/TWCS. > > > As I mentioned previously, the UI only queries recent data, e.g., the past > hour, past two hours, past day, past week. The UI does not query for > anything older than the TTL which is 7 days. My understanding and > expectation was that Cassandra would only scan live cells. The UI is a > separate application that I do not maintain, so I am not 100% certain about > the queries. I have been told that it does not query for anything older > than 7 days. > > On Sun, Jan 29, 2017 at 4:14 AM, kurt greaves <k...@instaclustr.com> > wrote: > > > Your partitioning key is text. If you have multiple entries per id you are > likely hitting older cells that have expired. Descending only affects how > the data is stored on disk, if you have to read the whole partition to find > whichever time you are querying for you could potentially hit tombstones in > other SSTables that contain the same "id". As mentioned previously, you > need to add a time bucket to your partitioning key and definitely use > DTCS/TWCS. > > > > > > -- > > - John > > > > > > > >
