Is the data distribution OK? Have you tried running repairs? Rahul
> On Jan 13, 2015, at 5:01 AM, Batranut Bogdan <batra...@yahoo.com> wrote: > > Hello, > > I have a cluster of 6 C* nodes. All machines have the same hardware. I have > noticed in opscenter that when I start reading a lot from the cluster 2 nodes > have read latencies, but the rest do not have such high values. The > replication factor for the keyspace is 3. Also those 2 nodes have latencies > when measuring the CF Local Read Latency so I know that the reads on the main > col family are slow on these 2 nodes. Partitioning is good since in the > column family there are a few million possible values. > Another thing is that I have stopped these 2 nodes and ran a few selections > for 6000 rows .... those were executed in about 15 seconds. I have changed > the keys so that I avoid caching as much as possible. > Also I have done the same test when running with all nodes and the execution > of the selection was abou 22 seconds.... > > Any ideeas? > > I am thinking on rebuilding the data on the nodes... Stop the node , delete > the data folder and restart... but I don't know the consequences....
