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
