Forgot to mention I am using Cassandra 2.0.13 On Mon, Mar 23, 2015 at 5:59 PM, Anishek Agarwal <anis...@gmail.com> wrote:
> Hello, > > I am using a single node server class machine with 16 CPUs with 32GB RAM > with a single drive attached to it. > > my table structure is as below > > CREATE TABLE t1(id bigint, ts timestamp, cat1 set<text>, cat2 set<text>, lat > float, lon float, a bigint, primary key (id, ts)); > > I am trying to insert 300 entries per partition key with 4000 partition > keys using 25 threads. Configurations > > write_request_timeout_in_ms: 5000 > concurrent_writes: 32 > heap space : 8GB > > Client side timeout is 12 sec using datastax java driver. > Consistency level: ONE > > With the above configuration i try to run it 10 times to eventually > generate around > > 300 * 4000 * 10 = 12000000 entries, > > When i run this after the first few runs i get a WriteTimeout exception at > client with "1 replica were required but only 0 acknowledged the write" > message. > > There are no errors in server log. Why does this error come how do i know > what is the limit I should limit concurrent writes to a single node to. > > > Looking at iostat disk utilization seems to be at 1-3% when running this. > > Please let me know if anything else is required. > > Regards, > Anishek > >
