Technologies/Elasticsearch/elasticsearch.node.fs.disk.total
ElasticsearchElasticsearchMetric

elasticsearch.node.fs.disk.total

Total disk space bytes
Dimensions:None
Available on:DatadogDatadog (9)OpenTelemetryOpenTelemetry (1)DynatraceDynatrace (2)

Summary

Reports the total disk capacity of the filesystem where Elasticsearch data is stored. This static value provides the denominator for calculating disk utilization percentages. Monitoring this alongside available disk space is essential for predicting when disk watermarks will be triggered, potentially causing shard relocation storms or read-only index enforcement.

Interface Metrics (12)
DatadogDatadog
The disk space used by the node's shards.
Dimensions:None
DatadogDatadog
The total percentage of disk space in use. Calculated as disk.used / disk.total.
Dimensions:None
DatadogDatadog
The total disk space for the node including in-use and available space.
Dimensions:None
DatadogDatadog
The total disk space in use.
Dimensions:None
DatadogDatadog
The total I/O operations on the file store [v1.0+].
Dimensions:None
DatadogDatadog
Total bytes used for all I/O operations on the file store [v1.0+].
Dimensions:None
DatadogDatadog
The total bytes read from the file store [v1.0+].
Dimensions:None
DatadogDatadog
The total bytes written to the file store [v1.0+].
Dimensions:None
DatadogDatadog
The total size in bytes of the file store.
Dimensions:None
OpenTelemetryOpenTelemetry
The amount of disk space across all file stores for this node.
Dimensions:None
DynatraceDynatrace
Filesystem size in bytes
Dimensions:None
DynatraceDynatrace
Amount of disk IO operations per second
Dimensions:None
Sources
elasticsearch.disk.indicesgithub.com
elasticsearch.disk.percentgithub.com
elasticsearch.disk.totalgithub.com
elasticsearch.disk.usedgithub.com
elasticsearch.fs.total.disk_io_opgithub.com
elasticsearch.fs.total.disk_io_size_in_bytesgithub.com
elasticsearch.fs.total.disk_read_size_in_bytesgithub.com
elasticsearch.fs.total.disk_write_size_in_bytesgithub.com
elasticsearch.fs.total.total_in_bytesgithub.com
elasticsearch.node.fs.disk.totalgithub.com
elasticsearch_filesystem_data_size_byteswww.dynatrace.com
Related Insights (1)
Disk Watermark Shard Relocation Stormwarning

When any node crosses the low disk watermark (85% full by default), Elasticsearch starts relocating shards. Multiple nodes hitting watermarks simultaneously can trigger cascading relocations that overload cluster I/O and delay recovery.

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