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The "StorageConfiguration" page has been changed by JonHermes. http://wiki.apache.org/cassandra/StorageConfiguration?action=diff&rev1=49&rev2=50 -------------------------------------------------- * '''dynamic_snitch''' and '''endpoint_snitch''' - !EndPointSnitch: Setting this to the class that implements {{{IEndPointSnitch}}} which will see if two endpoints are in the same data center or on the same rack. Out of the box, Cassandra provides {{{org.apache.cassandra.locator.RackInferringSnitch}}} which will assume that the 2nd and 3rd octets of the IP contain the datacenter and rack, {{{org.apache.cassandra.locator.SimpleSnitch}}} which will do nothing, {{{org.apache.cassandra.locator.PropertyFileSnitch}}} which will read from cassandra-topology.properties to give explicit proximities, and {{{org.apache.cassandra.locator.EC2Snitch}}} which will read the region and zone from the ec2 node and use them as datacenter and rack. + !EndPointSnitch: Setting this to the class that implements {{{IEndPointSnitch}}} which will see if two endpoints are in the same data center or on the same rack. Out of the box, Cassandra provides 4 such Snitches, found in {{{org.apache.cassandra.locator}}} : + + a. {{{org.apache.cassandra.locator.SimpleSnitch}}} which will do nothing, + a. {{{org.apache.cassandra.locator.RackInferringSnitch}}} which will assume that the 2nd and 3rd octets of the IP contain the datacenter and rack, + a. {{{org.apache.cassandra.locator.PropertyFileSnitch}}} which will read from cassandra-topology.properties to give explicit proximities, and + a. {{{org.apache.cassandra.locator.EC2Snitch}}} which will read the region and zone from the ec2 node and use them as datacenter and rack. Dynamic Snitch is a boolean that controls if the above snitch is wrapped with a dynamic snitch, which will monitor read latencies and avoid reading from hosts that have slowed.
