What RF? Is the update and read immediately after the delete and insert, or is the read after doing all the updates?
Is the delete and insert done with a single batch? -- Jack Krupansky On Thu, Dec 25, 2014 at 4:14 AM, <yhq...@sina.com> wrote: > Hi, all > I write a program to test the cassandra2.1. I have 6 nodes cluster. > First, I insert 1 million row data into cassandra. the row key from 1 to > 1000000. > > Then I run my test program. My test program first delete(use batch > mutate) the row and insert (use batch mutate) that row, > > then read (use gen_slice_range) the same row. After that check > whether the read data is same with the insert data or not. > The consistency level used is quorum. > > I found there some cases that not the same. About 1/10000. In this error > cases, some column is not same. > > Then I use cassandra-cli to check the data, found that column is not > exist. It seems insert partly. > My test program has 20 threads. the QPS 800 about > > What's wrong with cassandra?? > > > Thanks! >
