/** * 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. */ /** * Distributed cache for syncing state and data between Drillbits. * * The distributed cache defined in this package can be used to make data * available to all of the nodes in a Drill cluster. This is useful in cases * where most of the work of a given operation can be separated into independent * tasks, but some common information must be available to and mutable by all of * the nodes currently involved in the operation. */ package org.apache.drill.exec.cache;