Hi, I'm getting closer to commiting to cassandra, and now I'm in system/IT issues and questions. I'm in the amazon EC2 cloud. I previously used this forum to discover the best practice for disk layouts (large instance + the two ephemeral disks in RAID0 for data + root volume for everything else). Now I'm hoping to confirm bits and pieces of things I've read about for snitch/replication strategies. I was thinking of using endpoint_snitch: org.apache.cassandra.locator.Ec2Snitch placement_strategy='org.apache.cassandra.locator.NetworkTopologyStrategy' (for people hitting this from the mailing list or google, I feel obligated to note that the former setting is in cassandra.yaml, and the latter is an option on a keyspace).
But, I'm only in one region. Is using the amazon snitch/networktopology overkill given everything I have is in one DC (I believe region==DC and availability_zone==rack). I'm using multiple availability zones for some level of redundancy, I'm just not yet to the point I'm using multiple regions. If someday I move to using multiple regions, would that change the answer? Thanks! -- Will Oberman Civic Science, Inc. 3030 Penn Avenue., First Floor Pittsburgh, PA 15201 (M) 412-480-7835 (E) ober...@civicscience.com
