HDFS Metrics

In addition to these base metrics, many aggregate metrics are available. If an entity type has parents defined, you can formulate all possible aggregate metrics using the formula base_metric_across_parents.

In addition, metrics for aggregate totals can be formed by adding the prefix total_ to the front of the metric name.

Use the type-ahead feature in the Cloudera Manager chart browser to find the exact aggregate metric name, in case the plural form does not end in "s".

For example, the following metric names may be valid for HDFS:

  • alerts_rate_across_clusters
  • total_alerts_rate_across_clusters

Some metrics, such as alerts_rate, apply to nearly every metric context. Others only apply to a certain service or role.

For more information about metrics, see Cloudera Manager Metrics and Metric Aggregation.

Metric Name Description Unit Parents CDH Version
alerts_rate The number of alerts. events per second cluster CDH 4, CDH 5
block_capacity The block capacity of the NameNode blocks cluster CDH 4, CDH 5
blocks_total Blocks total blocks cluster CDH 4, CDH 5
blocks_with_corrupt_replicas Blocks with corrupt replicas blocks cluster CDH 4, CDH 5
canary_duration Duration of the last or currently running canary job ms cluster CDH 4, CDH 5
cm_time_since_last_fsimage_fetch Time since last FsImage was fetched by Cloudera Reports Manager seconds cluster CDH 4, CDH 5
cm_time_since_last_fsimage_index Time since last FsImage was indexed By Cloudera Reports Manager seconds cluster CDH 4, CDH 5
dfs_capacity Total configured HDFS storage capacity bytes cluster CDH 4, CDH 5
dfs_capacity_used Storage space used by HDFS files bytes cluster CDH 4, CDH 5
dfs_capacity_used_non_hdfs Storage space used by non-HDFS files bytes cluster CDH 4, CDH 5
events_critical_rate The number of critical events. events per second cluster CDH 4, CDH 5
events_important_rate The number of important events. events per second cluster CDH 4, CDH 5
events_informational_rate The number of informational events. events per second cluster CDH 4, CDH 5
excess_blocks The total number of excess blocks blocks cluster CDH 4, CDH 5
expired_heartbeats The number of expired heartbeats heartbeats cluster CDH 4, CDH 5
files_total The number of files and directories in the HDFS files cluster CDH 4, CDH 5
health_bad_rate Percentage of Time with Bad Health seconds per second cluster CDH 4, CDH 5
health_concerning_rate Percentage of Time with Concerning Health seconds per second cluster CDH 4, CDH 5
health_disabled_rate Percentage of Time with Disabled Health seconds per second cluster CDH 4, CDH 5
health_good_rate Percentage of Time with Good Health seconds per second cluster CDH 4, CDH 5
health_unknown_rate Percentage of Time with Unknown Health seconds per second cluster CDH 4, CDH 5
missing_blocks Missing blocks blocks cluster CDH 4, CDH 5
pending_deletion_blocks The number of replicas pending deletion. replicas cluster CDH 4, CDH 5
pending_replication_blocks The number of blocks with replication pending blocks cluster CDH 4, CDH 5
scheduled_replication_blocks The number of blocks with replication currently scheduled blocks cluster CDH 4, CDH 5
under_replicated_blocks Under-replicated blocks blocks cluster CDH 4, CDH 5
xceivers Transceivers transceivers cluster CDH 4, CDH 5