#
# 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.
#

#  syntax: [instance].sink|source.[name].[options]=[value]

#  This file configures Spark's internal metrics system. The metrics system is
#  divided into instances which correspond to internal components.
#  Each instance can be configured to report its metrics to one or more sinks.
#  Accepted values for [instance] are "master", "worker", "executor", "driver",
#  and "applications". A wildcard "*" can be used as an instance name, in
#  which case all instances will inherit the supplied property.
#
#  Within an instance, a "source" specifies a particular set of grouped metrics.
#  there are two kinds of sources:
#    1. Spark internal sources, like MasterSource, WorkerSource, etc, which will
#    collect a Spark component's internal state. Each instance is paired with a
#    Spark source that is added automatically.
#    2. Common sources, like JvmSource, which will collect low level state.
#    These can be added through configuration options and are then loaded
#    using reflection.
#
#  A "sink" specifies where metrics are delivered to. Each instance can be
#  assigned one or more sinks.
#
#  The sink|source field specifies whether the property relates to a sink or
#  source.
#
#  The [name] field specifies the name of source or sink.
#
#  The [options] field is the specific property of this source or sink. The
#  source or sink is responsible for parsing this property.
#
#  Notes:
#    1. To add a new sink, set the "class" option to a fully qualified class
#    name (see examples below).
#    2. Some sinks involve a polling period. The minimum allowed polling period
#    is 1 second.
#    3. Wildcard properties can be overridden by more specific properties.
#    For example, master.sink.console.period takes precedence over
#    *.sink.console.period.
#    4. A metrics specific configuration
#    "spark.metrics.conf=${SPARK_HOME}/conf/metrics.properties" should be
#    added to Java properties using -Dspark.metrics.conf=xxx if you want to
#    customize metrics system. You can also put the file in ${SPARK_HOME}/conf
#    and it will be loaded automatically.
#    5. The MetricsServlet sink is added by default as a sink in the master,
#    worker and driver, and you can send HTTP requests to the "/metrics/json"
#    endpoint to get a snapshot of all the registered metrics in JSON format.
#    For master, requests to the "/metrics/master/json" and
#    "/metrics/applications/json" endpoints can be sent separately to get
#    metrics snapshots of the master instance and applications. This
#    MetricsServlet does not have to be configured.

## List of available common sources and their properties.

# org.apache.spark.metrics.source.JvmSource
#   Note: Currently, JvmSource is the only available common source.
#         It can be added to an instance by setting the "class" option to its
#         fully qualified class name (see examples below).

## List of available sinks and their properties.

# org.apache.spark.metrics.sink.ConsoleSink
#   Name:   Default:   Description:
#   period  10         Poll period
#   unit    seconds    Unit of the poll period

# org.apache.spark.metrics.sink.CSVSink
#   Name:     Default:   Description:
#   period    10         Poll period
#   unit      seconds    Unit of the poll period
#   directory /tmp       Where to store CSV files

# org.apache.spark.metrics.sink.GangliaSink
#   Name:     Default:   Description:
#   host      NONE       Hostname or multicast group of the Ganglia server,
#                        must be set
#   port      NONE       Port of the Ganglia server(s), must be set
#   period    10         Poll period
#   unit      seconds    Unit of the poll period
#   ttl       1          TTL of messages sent by Ganglia
#   dmax      0          Lifetime in seconds of metrics (0 never expired)
#   mode      multicast  Ganglia network mode ('unicast' or 'multicast')

# org.apache.spark.metrics.sink.JmxSink

# org.apache.spark.metrics.sink.MetricsServlet
#   Name:     Default:   Description:
#   path      VARIES*    Path prefix from the web server root
#   sample    false      Whether to show entire set of samples for histograms
#                        ('false' or 'true')
#
# * Default path is /metrics/json for all instances except the master. The
#   master has two paths:
#     /metrics/applications/json # App information
#     /metrics/master/json       # Master information

# org.apache.spark.metrics.sink.GraphiteSink
#   Name:     Default:      Description:
#   host      NONE          Hostname of the Graphite server, must be set
#   port      NONE          Port of the Graphite server, must be set
#   period    10            Poll period
#   unit      seconds       Unit of the poll period
#   prefix    EMPTY STRING  Prefix to prepend to every metric's name
#   protocol  tcp           Protocol ("tcp" or "udp") to use

## Examples
# Enable JmxSink for all instances by class name
#*.sink.jmx.class=org.apache.spark.metrics.sink.JmxSink

# Enable ConsoleSink for all instances by class name
#*.sink.console.class=org.apache.spark.metrics.sink.ConsoleSink

# Polling period for the ConsoleSink
#*.sink.console.period=10
# Unit of the polling period for the ConsoleSink
#*.sink.console.unit=seconds

# Polling period for the ConsoleSink specific for the master instance
#master.sink.console.period=15
# Unit of the polling period for the ConsoleSink specific for the master
# instance
#master.sink.console.unit=seconds

# Enable CsvSink for all instances by class name
#*.sink.csv.class=org.apache.spark.metrics.sink.CsvSink

# Polling period for the CsvSink
#*.sink.csv.period=1
# Unit of the polling period for the CsvSink
#*.sink.csv.unit=minutes

# Polling directory for CsvSink
#*.sink.csv.directory=/tmp/

# Polling period for the CsvSink specific for the worker instance
#worker.sink.csv.period=10
# Unit of the polling period for the CsvSink specific for the worker instance
#worker.sink.csv.unit=minutes

# Enable Slf4jSink for all instances by class name
#*.sink.slf4j.class=org.apache.spark.metrics.sink.Slf4jSink

# Polling period for the Slf4JSink
#*.sink.slf4j.period=1
# Unit of the polling period for the Slf4jSink
#*.sink.slf4j.unit=minutes

# Enable JvmSource for instance master, worker, driver and executor
#master.source.jvm.class=org.apache.spark.metrics.source.JvmSource

#worker.source.jvm.class=org.apache.spark.metrics.source.JvmSource

#driver.source.jvm.class=org.apache.spark.metrics.source.JvmSource

#executor.source.jvm.class=org.apache.spark.metrics.source.JvmSource
