
org.apache.cassandra.locator.SimpleSnitch Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.cassandra.locator;
/**
* A simple endpoint snitch implementation that treats Strategy order as proximity,
* allowing non-read-repaired reads to prefer a single endpoint, which improves
* cache locality.
*/
public class SimpleSnitch extends AbstractEndpointSnitch
{
public static final String DATA_CENTER_NAME = "datacenter1";
public static final String RACK_NAME = "rack1";
public String getRack(InetAddressAndPort endpoint)
{
return RACK_NAME;
}
public String getDatacenter(InetAddressAndPort endpoint)
{
return DATA_CENTER_NAME;
}
@Override
public > C sortedByProximity(final InetAddressAndPort address, C unsortedAddress)
{
// Optimization to avoid walking the list
return unsortedAddress;
}
@Override
public int compareEndpoints(InetAddressAndPort target, Replica r1, Replica r2)
{
// Making all endpoints equal ensures we won't change the original ordering (since
// Collections.sort is guaranteed to be stable)
return 0;
}
}
© 2015 - 2025 Weber Informatics LLC | Privacy Policy