My group is seeing the same thing and also can not figure out why its happening.
On Mon, Mar 23, 2015 at 8:36 AM, Anishek Agarwal <anis...@gmail.com> wrote: > 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 >> >> > -- http://about.me/BrianTarbox
