kuang@DEVP ~/MyPrograms/Apache_Druid/apache-druid-28.0.1
$ cat ./conf/druid/cluster/_common/common.runtime.properties
## 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.## Extensions specified in the load list will be loaded by Druid# We are using local fs for deep storage - not recommended for production - use S3, HDFS, or NFS instead# We are using local derby for the metadata store - not recommended for production - use MySQL or Postgres instead# If you specify `druid.extensions.loadList=[]`, Druid won't load any extension from file system.# If you don't specify `druid.extensions.loadList`, Druid will load all the extensions under root extension directory.# More info: https://druid.apache.org/docs/latest/operations/including-extensions.html
druid.extensions.loadList=["druid-hdfs-storage", "druid-kafka-indexing-service", "druid-datasketches", "druid-multi-stage-query"]# If you have a different version of Hadoop, place your Hadoop client jar files in your hadoop-dependencies directory# and uncomment the line below to point to your directory.#druid.extensions.hadoopDependenciesDir=/my/dir/hadoop-dependencies## Hostname#
druid.host=localhost
## Logging## Log all runtime properties on startup. Disable to avoid logging properties on startup:
druid.startup.logging.logProperties=true## Zookeeper#
druid.zk.service.host=localhost
druid.zk.paths.base=/druid
## Metadata storage## For Derby server on your Druid Coordinator (only viable in a cluster with a single Coordinator, no fail-over):
druid.metadata.storage.type=derby
druid.metadata.storage.connector.connectURI=jdbc:derby://localhost:1527/var/druid/metadata.db;create=true
druid.metadata.storage.connector.host=localhost
druid.metadata.storage.connector.port=1527
# For MySQL (make sure to include the MySQL JDBC driver on the classpath):#druid.metadata.storage.type=mysql#druid.metadata.storage.connector.connectURI=jdbc:mysql://db.example.com:3306/druid#druid.metadata.storage.connector.user=...#druid.metadata.storage.connector.password=...# For PostgreSQL:#druid.metadata.storage.type=postgresql#druid.metadata.storage.connector.connectURI=jdbc:postgresql://db.example.com:5432/druid#druid.metadata.storage.connector.user=...#druid.metadata.storage.connector.password=...## Deep storage## For local disk (only viable in a cluster if this is a network mount):
druid.storage.type=local
druid.storage.storageDirectory=var/druid/segments
# For HDFS:#druid.storage.type=hdfs#druid.storage.storageDirectory=/druid/segments# For S3:#druid.storage.type=s3#druid.storage.bucket=your-bucket#druid.storage.baseKey=druid/segments#druid.s3.accessKey=...#druid.s3.secretKey=...## Indexing service logs## For local disk (only viable in a cluster if this is a network mount):
druid.indexer.logs.type=file
druid.indexer.logs.directory=var/druid/indexing-logs
# For HDFS:#druid.indexer.logs.type=hdfs#druid.indexer.logs.directory=/druid/indexing-logs# For S3:#druid.indexer.logs.type=s3#druid.indexer.logs.s3Bucket=your-bucket#druid.indexer.logs.s3Prefix=druid/indexing-logs## Service discovery#
druid.selectors.indexing.serviceName=druid/overlord
druid.selectors.coordinator.serviceName=druid/coordinator
## Monitoring#
druid.monitoring.monitors=["org.apache.druid.java.util.metrics.JvmMonitor", "org.apache.druid.server.metrics.ServiceStatusMonitor"]
druid.emitter=noop
druid.emitter.logging.logLevel=info
# Storage type of double columns# ommiting this will lead to index double as float at the storage layer
druid.indexing.doubleStorage=double
## Security#
druid.server.hiddenProperties=["druid.s3.accessKey","druid.s3.secretKey","druid.metadata.storage.connector.password", "password", "key", "token", "pwd"]## SQL#
druid.sql.enable=true# Planning SQL query when there is aggregate distinct in the statement
druid.sql.planner.useGroupingSetForExactDistinct=true## Lookups#
druid.lookup.enableLookupSyncOnStartup=false## Expression processing config#
druid.expressions.useStrictBooleans=true## Http client#
druid.global.http.eagerInitialization=false