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📄 ZFS-pool-latency-heatmaps-influxdb.json(38.36 KB)

Editing: ZFS-pool-latency-heatmaps-influxdb.json

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              "key": "host",
              "operator": "=~",
              "value": "/^$hostname$/"
            },
            {
              "condition": "AND",
              "key": "name",
              "operator": "=~",
              "value": "/^$poolname$/"
            }
          ]
        }
      ],
      "timeFrom": null,
      "timeShift": null,
      "title": "Async Write Queue",
      "tooltip": {
        "show": true,
        "showHistogram": true
      },
      "type": "heatmap",
      "xAxis": {
        "show": true
      },
      "xBucketNumber": null,
      "xBucketSize": null,
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    {
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      "color": {
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        "colorScale": "sqrt",
        "colorScheme": "interpolateOranges",
        "exponent": 0.5,
        "mode": "spectrum"
      },
      "dataFormat": "tsbuckets",
      "datasource": "${DS_MACBOOK-INFLUX}",
      "description": "Latency histogram for the trim or unmap operations of a ZFS pool",
      "fieldConfig": {
        "defaults": {
          "custom": {}
        },
        "overrides": []
      },
      "gridPos": {
        "h": 8,
        "w": 5,
        "x": 10,
        "y": 20
      },
      "heatmap": {},
      "hideZeroBuckets": false,
      "highlightCards": true,
      "id": 16,
      "legend": {
        "show": false
      },
      "reverseYBuckets": false,
      "targets": [
        {
          "alias": "$tag_le",
          "groupBy": [
            {
              "params": [
                "$__interval"
              ],
              "type": "time"
            },
            {
              "params": [
                "le"
              ],
              "type": "tag"
            },
            {
              "params": [
                "null"
              ],
              "type": "fill"
            }
          ],
          "measurement": "zpool_latency",
          "orderByTime": "ASC",
          "policy": "default",
          "refId": "A",
          "resultFormat": "time_series",
          "select": [
            [
              {
                "params": [
                  "trim"
                ],
                "type": "field"
              },
              {
                "params": [],
                "type": "last"
              },
              {
                "params": [
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                "type": "non_negative_derivative"
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          "tags": [
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              "operator": "=~",
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            {
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              "operator": "=~",
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          ]
        }
      ],
      "timeFrom": null,
      "timeShift": null,
      "title": "Trim Write Queue",
      "tooltip": {
        "show": true,
        "showHistogram": true
      },
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        "colorScheme": "interpolateOranges",
        "exponent": 0.5,
        "mode": "spectrum"
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      "dataFormat": "tsbuckets",
      "datasource": "${DS_MACBOOK-INFLUX}",
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      "fieldConfig": {
        "defaults": {
          "custom": {}
        },
        "overrides": []
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      "gridPos": {
        "h": 8,
        "w": 9,
        "x": 15,
        "y": 20
      },
      "heatmap": {},
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      "highlightCards": true,
      "id": 17,
      "legend": {
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      },
      "reverseYBuckets": false,
      "targets": [
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          "alias": "$tag_le",
          "groupBy": [
            {
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              "type": "time"
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            {
              "params": [
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              "type": "tag"
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            {
              "params": [
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              ],
              "type": "fill"
            }
          ],
          "measurement": "zpool_latency",
          "orderByTime": "ASC",
          "policy": "default",
          "refId": "A",
          "resultFormat": "time_series",
          "select": [
            [
              {
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                ],
                "type": "field"
              },
              {
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                "type": "last"
              },
              {
                "params": [
                  "1s"
                ],
                "type": "non_negative_derivative"
              }
            ]
          ],
          "tags": [
            {
              "key": "host",
              "operator": "=~",
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            },
            {
              "condition": "AND",
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              "operator": "=~",
              "value": "/^$poolname$/"
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          ]
        }
      ],
      "timeFrom": null,
      "timeShift": null,
      "title": "Disk Write Queue",
      "tooltip": {
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        "showHistogram": true
      },
      "type": "heatmap",
      "xAxis": {
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      },
      "xBucketNumber": null,
      "xBucketSize": null,
      "yAxis": {
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        "format": "s",
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        "min": null,
        "show": true,
        "splitFactor": null
      },
      "yBucketBound": "auto",
      "yBucketNumber": null,
      "yBucketSize": null
    },
    {
      "collapsed": false,
      "datasource": "${DS_MACBOOK-INFLUX}",
      "gridPos": {
        "h": 1,
        "w": 24,
        "x": 0,
        "y": 28
      },
      "id": 19,
      "panels": [],
      "title": "About",
      "type": "row"
    },
    {
      "content": "I/O requests that are satisfied by accessing pool devices are managed by the ZIO scheduler.\nThe total latency is measured from the start of the I/O to completion by the disk.\nLatency through each queue is shown prior to its submission to the disk queue.\n\nThis view is useful for observing the effects of tuning the ZIO scheduler min and max values\n(see zfs-module-parameters(5) and [ZFS on Linux Module Parameters](https://openzfs.github.io/openzfs-docs/Performance%20and%20tuning/ZFS%20on%20Linux%20Module%20Parameters.html)):\n+ *zfs_vdev_max_active* controls the ZIO scheduler's disk queue depth (do not confuse with the block device's nr_requests)\n+ *zfs_vdev_sync_read_min_active* and *zfs_vdev_sync_read_max_active* control the synchronous queue for reads: most reads are sync\n+ *zfs_vdev_sync_write_min_active* and *zfs_vdev_sync_write_max_active* control the synchronous queue for writes: \nusually metadata or user data depending on the \"sync\" property setting or I/Os that are requested to be flushed\n+ *zfs_vdev_async_read_min_active* and *zfs_vdev_async_read_max_active* control the asynchronous queue for reads: usually prefetches\n+ *zfs_vdev_async_write_min_active* and *zfs_vdev_async_write_max_active* control the asynchronous queue for writes: \nusually the bulk of all writes at transaction group (txg) commit\n+ *zfs_vdev_scrub_min_active* and *zfs_vdev_scrub_max_active* controls the scan reads: usually scrub or resilver\n\n",
      "datasource": "${DS_MACBOOK-INFLUX}",
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        },
        "overrides": []
      },
      "gridPos": {
        "h": 15,
        "w": 16,
        "x": 0,
        "y": 29
      },
      "id": 21,
      "mode": "markdown",
      "targets": [
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              "type": "time"
            },
            {
              "params": [
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              ],
              "type": "fill"
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          ],
          "orderByTime": "ASC",
          "policy": "default",
          "refId": "A",
          "resultFormat": "time_series",
          "select": [
            [
              {
                "params": [
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                ],
                "type": "field"
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              {
                "params": [],
                "type": "mean"
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            ]
          ],
          "tags": []
        }
      ],
      "timeFrom": null,
      "timeShift": null,
      "title": "About ZFS Pool All Queues Read/Write Latency Histograms",
      "type": "text"
    },
    {
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        "rgba(50, 172, 45, 0.97)",
        "rgba(237, 129, 40, 0.89)",
        "rgba(245, 54, 54, 0.9)"
      ],
      "composites": [],
      "content": "graph LR\nIO((I/O request)) --> SR(sync read queue)\nIO --> SW(sync write queue)\nIO --> AR(async read queue)\nIO --> AW(async write queue)\nIO --> SCRUB(scrub queue)\nIO --> TRIM(trim queue)\nSR --> DISKQ(disk queue)\nSW --> DISKQ\nAR --> DISKQ\nAW --> DISKQ\nSCRUB --> DISKQ\nTRIM --> DISKQ\nDISKQ --> DISK((disk))\n",
      "datasource": "${DS_MACBOOK-INFLUX}",
      "decimals": 2,
      "fieldConfig": {
        "defaults": {
          "custom": {}
        },
        "overrides": []
      },
      "format": "none",
      "graphId": "diagram_23",
      "gridPos": {
        "h": 15,
        "w": 7,
        "x": 16,
        "y": 29
      },
      "id": 23,
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          "useMaxWidth": true
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          "barHeight": 20,
          "fontFamily": "\"Open-Sans\", \"sans-serif\"",
          "fontSize": 11,
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          "leftPadding": 75,
          "numberSectionStyles": 3,
          "titleTopMargin": 25,
          "topPadding": 50
        },
        "logLevel": 3,
        "securityLevel": "loose",
        "sequence": {
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          "bottomMarginAdj": 1,
          "boxMargin": 10,
          "boxTextMargin": 5,
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          "useMaxWidth": true,
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        },
        "startOnLoad": false,
        "theme": "dark"
      },
      "legend": {
        "avg": true,
        "current": true,
        "gradient": {
          "enabled": true,
          "show": true
        },
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        "show": false,
        "total": true
      },
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      "mermaidServiceUrl": "",
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              "type": "fill"
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          ],
          "hide": true,
          "orderByTime": "ASC",
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      "valueOptions": [
        "avg",
        "min",
        "max",
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    }
  ],
  "refresh": false,
  "schemaVersion": 22,
  "style": "dark",
  "tags": [
    "ZFS",
    "Latency",
    "Histogram"
  ],
  "templating": {
    "list": [
      {
        "allValue": null,
        "current": {},
        "datasource": "${DS_MACBOOK-INFLUX}",
        "definition": "show tag values from \"zpool_latency\" with key = \"host\"",
        "hide": 0,
        "includeAll": false,
        "index": -1,
        "label": null,
        "multi": false,
        "name": "hostname",
        "options": [],
        "query": "show tag values from \"zpool_latency\" with key = \"host\"",
        "refresh": 1,
        "regex": "/([-a-zA-Z-0-9]+)/",
        "skipUrlSync": false,
        "sort": 5,
        "tagValuesQuery": "",
        "tags": [],
        "tagsQuery": "",
        "type": "query",
        "useTags": false
      },
      {
        "allValue": null,
        "current": {},
        "datasource": "${DS_MACBOOK-INFLUX}",
        "definition": "show tag values from \"zpool_latency\" with key = \"name\"  where \"host\" =~ /^$hostname/",
        "hide": 0,
        "includeAll": false,
        "index": -1,
        "label": null,
        "multi": false,
        "name": "poolname",
        "options": [],
        "query": "show tag values from \"zpool_latency\" with key = \"name\"  where \"host\" =~ /^$hostname/",
        "refresh": 1,
        "regex": "",
        "skipUrlSync": false,
        "sort": 5,
        "tagValuesQuery": "",
        "tags": [],
        "tagsQuery": "",
        "type": "query",
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  },
  "time": {
    "from": "2020-05-25T21:34:30.137Z",
    "to": "2020-05-25T21:39:54.445Z"
  },
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      "5m",
      "15m",
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      "1d"
    ]
  },
  "timezone": "",
  "title": "ZFS Pool Latency Heatmaps Influxdb",
  "uid": "TbB4-DkGz",
  "variables": {
    "list": []
  },
  "version": 2
}

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