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telegraf/plugins/inputs/cassandra/README.md

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# Cassandra Input Plugin
Added cassandra plugin to access metrics using jolokia and push them to influxdb.
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chore: Fix readme linter errors for input plugins A-D (#10964)
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**Deprecated in version 1.7**: Please use the [jolokia2](../jolokia2/README.md)
plugin with the [cassandra.conf](../jolokia2/examples/cassandra.conf) example
configuration.
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## Plugin arguments
Deprecate the cassandra input plugin (#4050)
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- **context** string: Context root used for jolokia url
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- **servers** []string: List of servers with the format `<user:passwd@><host>:port`"
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- **metrics** []string: List of Jmx paths that identify mbeans attributes
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## Description
Added cassandra plugin to access metrics using jolokia and push them to influxdb.
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The Cassandra plugin collects Cassandra 3 / JVM metrics exposed as MBean's
attributes through jolokia REST endpoint. All metrics are collected for each
server configured.
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See: [https://jolokia.org/](https://jolokia.org/) and [Cassandra
Documentation][1]
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[1]: http://docs.datastax.com/en/cassandra/3.x/cassandra/operations/monitoringCassandraTOC.html
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chore: Fix readme linter errors for input plugins A-D (#10964)
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## Metrics
Cassandra plugin produces one or more measurements for each metric configured,
adding Server's name as `host` tag. More than one measurement is generated when
querying table metrics with a wildcard for the keyspace or table name.
Added cassandra plugin to access metrics using jolokia and push them to influxdb.
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## Configuration
Added cassandra plugin to access metrics using jolokia and push them to influxdb.
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chore: Embed sample configurations into README for inputs (#11136)
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```toml @sample.conf
Linter fixes for plugins/inputs/[c]* (#9194) * Linter fixes for plugins/inputs/[c]* * Linter fixes for plugins/inputs/[c]* Co-authored-by: Pawel Zak <Pawel Zak>
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# Read Cassandra metrics through Jolokia
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[[inputs.cassandra]]
context = "/jolokia/read"
Linter fixes for plugins/inputs/[c]* (#9194) * Linter fixes for plugins/inputs/[c]* * Linter fixes for plugins/inputs/[c]* Co-authored-by: Pawel Zak <Pawel Zak>
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## List of cassandra servers exposing jolokia read service
servers = ["myuser:mypassword@10.10.10.1:8778","10.10.10.2:8778",":8778"]
## List of metrics collected on above servers
## Each metric consists of a jmx path.
## This will collect all heap memory usage metrics from the jvm and
## ReadLatency metrics for all keyspaces and tables.
## "type=Table" in the query works with Cassandra3.0. Older versions might
## need to use "type=ColumnFamily"
metrics = [
"/java.lang:type=Memory/HeapMemoryUsage",
"/org.apache.cassandra.metrics:type=Table,keyspace=*,scope=*,name=ReadLatency"
]
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```
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## Example Output
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```shell
Added cassandra plugin to access metrics using jolokia and push them to influxdb.
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javaMemory,host=myHost,mname=HeapMemoryUsage HeapMemoryUsage_committed=1040187392,HeapMemoryUsage_init=1050673152,HeapMemoryUsage_max=1040187392,HeapMemoryUsage_used=368155000 1459551767230567084
```
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## Useful Metrics
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Here is a list of metrics that might be useful to monitor your cassandra
cluster. This was put together from multiple sources on the web.
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- [How to monitor Cassandra performance metrics](https://www.datadoghq.com/blog/how-to-monitor-cassandra-performance-metrics)
- [Cassandra Documentation](http://docs.datastax.com/en/cassandra/3.x/cassandra/operations/monitoringCassandraTOC.html)
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### measurement = javaGarbageCollector
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- /java.lang:type=GarbageCollector,name=ConcurrentMarkSweep/CollectionTime
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- /java.lang:type=GarbageCollector,name=ConcurrentMarkSweep/CollectionCount
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- /java.lang:type=GarbageCollector,name=ParNew/CollectionTime
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- /java.lang:type=GarbageCollector,name=ParNew/CollectionCount
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### measurement = javaMemory
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- /java.lang:type=Memory/HeapMemoryUsage
- /java.lang:type=Memory/NonHeapMemoryUsage
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### measurement = cassandraCache
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- /org.apache.cassandra.metrics:type=Cache,scope=KeyCache,name=Hits
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- /org.apache.cassandra.metrics:type=Cache,scope=KeyCache,name=Requests
- /org.apache.cassandra.metrics:type=Cache,scope=KeyCache,name=Entries
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- /org.apache.cassandra.metrics:type=Cache,scope=KeyCache,name=Size
- /org.apache.cassandra.metrics:type=Cache,scope=KeyCache,name=Capacity
- /org.apache.cassandra.metrics:type=Cache,scope=RowCache,name=Hits
- /org.apache.cassandra.metrics:type=Cache,scope=RowCache,name=Requests
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- /org.apache.cassandra.metrics:type=Cache,scope=RowCache,name=Entries
- /org.apache.cassandra.metrics:type=Cache,scope=RowCache,name=Size
- /org.apache.cassandra.metrics:type=Cache,scope=RowCache,name=Capacity
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### measurement = cassandraClient
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- /org.apache.cassandra.metrics:type=Client,name=connectedNativeClients
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### measurement = cassandraClientRequest
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- /org.apache.cassandra.metrics:type=ClientRequest,scope=Read,name=TotalLatency
- /org.apache.cassandra.metrics:type=ClientRequest,scope=Write,name=TotalLatency
- /org.apache.cassandra.metrics:type=ClientRequest,scope=Read,name=Latency
- /org.apache.cassandra.metrics:type=ClientRequest,scope=Write,name=Latency
- /org.apache.cassandra.metrics:type=ClientRequest,scope=Read,name=Timeouts
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- /org.apache.cassandra.metrics:type=ClientRequest,scope=Write,name=Timeouts
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- /org.apache.cassandra.metrics:type=ClientRequest,scope=Read,name=Unavailables
- /org.apache.cassandra.metrics:type=ClientRequest,scope=Write,name=Unavailables
- /org.apache.cassandra.metrics:type=ClientRequest,scope=Read,name=Failures
- /org.apache.cassandra.metrics:type=ClientRequest,scope=Write,name=Failures
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### measurement = cassandraCommitLog
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- /org.apache.cassandra.metrics:type=CommitLog,name=PendingTasks
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- /org.apache.cassandra.metrics:type=CommitLog,name=TotalCommitLogSize
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### measurement = cassandraCompaction
Added cassandra plugin to access metrics using jolokia and push them to influxdb.
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- /org.apache.cassandra.metrics:type=Compaction,name=CompletedTasks
- /org.apache.cassandra.metrics:type=Compaction,name=PendingTasks
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- /org.apache.cassandra.metrics:type=Compaction,name=TotalCompactionsCompleted
- /org.apache.cassandra.metrics:type=Compaction,name=BytesCompacted
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### measurement = cassandraStorage
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- /org.apache.cassandra.metrics:type=Storage,name=Load
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- /org.apache.cassandra.metrics:type=Storage,name=Exceptions
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### measurement = cassandraTable
chore: Fix readme linter errors for input plugins A-D (#10964)
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Using wildcards for "keyspace" and "scope" can create a lot of series as metrics
will be reported for every table and keyspace including internal system
tables. Specify a keyspace name and/or a table name to limit them.
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- /org.apache.cassandra.metrics:type=Table,keyspace=\*,scope=\*,name=LiveDiskSpaceUsed
- /org.apache.cassandra.metrics:type=Table,keyspace=\*,scope=\*,name=TotalDiskSpaceUsed
- /org.apache.cassandra.metrics:type=Table,keyspace=\*,scope=\*,name=ReadLatency
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- /org.apache.cassandra.metrics:type=Table,keyspace=\*,scope=\*,name=CoordinatorReadLatency
- /org.apache.cassandra.metrics:type=Table,keyspace=\*,scope=\*,name=WriteLatency
- /org.apache.cassandra.metrics:type=Table,keyspace=\*,scope=\*,name=ReadTotalLatency
- /org.apache.cassandra.metrics:type=Table,keyspace=\*,scope=\*,name=WriteTotalLatency
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### measurement = cassandraThreadPools
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- /org.apache.cassandra.metrics:type=ThreadPools,path=internal,scope=CompactionExecutor,name=ActiveTasks
- /org.apache.cassandra.metrics:type=ThreadPools,path=internal,scope=AntiEntropyStage,name=ActiveTasks
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- /org.apache.cassandra.metrics:type=ThreadPools,path=request,scope=CounterMutationStage,name=PendingTasks
- /org.apache.cassandra.metrics:type=ThreadPools,path=request,scope=CounterMutationStage,name=CurrentlyBlockedTasks
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- /org.apache.cassandra.metrics:type=ThreadPools,path=request,scope=MutationStage,name=PendingTasks
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- /org.apache.cassandra.metrics:type=ThreadPools,path=request,scope=MutationStage,name=CurrentlyBlockedTasks
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- /org.apache.cassandra.metrics:type=ThreadPools,path=request,scope=ReadRepairStage,name=PendingTasks
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- /org.apache.cassandra.metrics:type=ThreadPools,path=request,scope=ReadRepairStage,name=CurrentlyBlockedTasks
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- /org.apache.cassandra.metrics:type=ThreadPools,path=request,scope=ReadStage,name=PendingTasks
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- /org.apache.cassandra.metrics:type=ThreadPools,path=request,scope=ReadStage,name=CurrentlyBlockedTasks
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- /org.apache.cassandra.metrics:type=ThreadPools,path=request,scope=RequestResponseStage,name=PendingTasks
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- /org.apache.cassandra.metrics:type=ThreadPools,path=request,scope=RequestResponseStage,name=CurrentlyBlockedTasks