mmap segment underflow

2011-08-27 Thread Chad Johnson
Hi, We periodically get the following exception in our Cassandra cluster. What I mean by periodically is once or twice a week. It always affects the same column family ( containing super columns). The frequency of the problems seems to center on the same couple nodes, but not always. I've been

Bootstrapping

2011-08-10 Thread Chad Johnson
Hi, I have a 15 node cluster with a RF=3 running version 0.7.5. I am planning to perform some filesystem maintenance on each of the nodes. The filesystem happens to be on the partition holding the keyspace data. The maintenance means that all the SSTables for our keyspace will be destroyed. Rat

Some commit logs not deleting

2011-07-24 Thread Chad Johnson
Hello, We are running Cassandra 0.7.5 on a 15 node cluster, RF=3. We are having a problem where some commit logs do not get deleted. Our write load generates a new commit log about every two to three minutes. On average, one commit log an hour is not deleted. Without draining, deleting the remaini