Gargi-jais11 commented on code in PR #10609:
URL: https://github.com/apache/ozone/pull/10609#discussion_r3585027156
##########
hadoop-ozone/dist/src/main/compose/common/grafana/dashboards/Ozone - Disk
Balancer.json:
##########
@@ -0,0 +1,358 @@
+{
+ "annotations": {
+ "list": [
+ {
+ "builtIn": true,
+ "enable": true,
+ "hide": true,
+ "name": "Annotations & Alerts",
+ "type": "dashboard"
+ }
+ ]
+ },
+ "editable": true,
+ "fiscalYearStartMonth": 0,
+ "graphTooltip": 1,
+ "id": null,
+ "links": [],
+ "liveNow": false,
+ "panels": [
+ {
+ "id": 2,
+ "title": "Disk Space Convergence Profile (Historical Before vs After)",
+ "type": "timeseries",
+ "description": "Shows how full each disk is over time. When the balancer
is running, you should see these lines slowly move closer together until they
meet in the middle.",
+ "gridPos": { "x": 0, "y": 0, "w": 12, "h": 7 },
+ "datasource": { "type": "prometheus", "uid": "${datasource}" },
+ "targets": [
+ {
+ "expr": "sum({__name__=~\"volume_info_metrics_.*_ozone_used\",
instance=~\"$datanode.*\"}) by (instance, storagedirectory)",
+ "legendFormat": "{{storagedirectory}}",
+ "refId": "A"
+ }
+ ],
+ "fieldConfig": {
+ "defaults": {
+ "unit": "decbytes",
+ "color": { "mode": "palette-classic" },
+ "custom": {
+ "drawStyle": "line",
+ "lineInterpolation": "smooth",
+ "lineWidth": 2
+ }
+ }
+ }
+ },
+ {
+ "id": 3,
+ "title": "Current Disk Space Allocation Skew (Max - Min Volume Gap)",
+ "type": "bargauge",
+ "description": "The exact size of the data gap between your most full
disk and your emptiest disk right now. The balancer's goal is to shrink this
number down to zero.",
+ "gridPos": { "x": 12, "y": 0, "w": 12, "h": 7 },
+ "datasource": { "type": "prometheus", "uid": "${datasource}" },
+ "targets": [
+ {
+ "expr": "max(sum({__name__=~\"volume_info_metrics_.*_ozone_used\",
instance=~\"$datanode.*\"}) by (instance, storagedirectory)) by (instance) -
min(sum({__name__=~\"volume_info_metrics_.*_ozone_used\",
instance=~\"$datanode.*\"}) by (instance, storagedirectory)) by (instance)",
+ "instant": true,
+ "refId": "A"
+ }
+ ],
+ "fieldConfig": {
+ "defaults": {
+ "unit": "decbytes",
+ "max": 5368709120
+ }
+ },
+ "options": {
+ "displayMode": "lcd",
+ "orientation": "horizontal",
+ "reduceOptions": { "calcs": ["lastNotNull"] }
+ }
+ },
+ {
+ "id": 5,
+ "title": "Active Balancing Throughput Speed",
+ "type": "stat",
+ "description": "The live speedometer. This shows exactly how fast data
is physically copying from one disk to another across the node.",
+ "gridPos": { "x": 0, "y": 7, "w": 6, "h": 7 },
+ "datasource": { "type": "prometheus", "uid": "${datasource}" },
+ "targets": [
+ {
+ "expr":
"rate(disk_balancer_service_metrics_success_bytes{instance=~\"$datanode.*\"}[1m])",
+ "refId": "A"
+ }
+ ],
+ "fieldConfig": {
+ "defaults": {
+ "unit": "Bps"
+ }
+ },
+ "options": {
+ "graphMode": "area",
+ "textMode": "value",
+ "reduceOptions": { "calcs": ["lastNotNull"] }
+ }
+ },
+ {
+ "id": 7,
+ "title": "Unscheduled Target Backlog",
+ "type": "stat",
+ "description": "The remaining amount of data the balancer still needs to
queue up to reach perfect balance.",
+ "gridPos": { "x": 6, "y": 7, "w": 8, "h": 7 },
+ "datasource": { "type": "prometheus", "uid": "${datasource}" },
+ "targets": [
+ {
+ "expr":
"max({__name__=~\"volume_info_metrics_data_disk[0-9]+_ozone_used\",
instance=~\"$datanode.*\"}) by (instance) -
avg({__name__=~\"volume_info_metrics_data_disk[0-9]+_ozone_used\",
instance=~\"$datanode.*\"}) by (instance)",
+ "instant": true,
+ "refId": "A"
+ }
+ ],
+ "fieldConfig": {
+ "defaults": {
+ "unit": "decbytes"
+ }
+ },
+ "options": {
+ "graphMode": "none",
+ "textMode": "value",
+ "reduceOptions": { "calcs": ["lastNotNull"] }
+ }
+ },
+ {
+ "id": 8,
+ "title": "Est. Time for Unscheduled Backlog",
+ "type": "stat",
+ "description": "A rough estimate of how many minutes are left before the
balancer finishes balancing.",
+ "gridPos": { "x": 14, "y": 7, "w": 10, "h": 7 },
+ "datasource": { "type": "prometheus", "uid": "${datasource}" },
+ "targets": [
+ {
+ "expr":
"((sum(max({__name__=~\"volume_info_metrics_data_disk[0-9]+_ozone_used\",
instance=~\"$datanode.*\"}) by (instance) -
avg({__name__=~\"volume_info_metrics_data_disk[0-9]+_ozone_used\",
instance=~\"$datanode.*\"}) by (instance)) /
(sum(rate(disk_balancer_service_metrics_success_bytes{instance=~\"$datanode.*\"}[1m]))
> 0)) / 60) or vector(0)",
+ "instant": true,
+ "refId": "A"
+ }
+ ],
+ "fieldConfig": {
+ "defaults": {
+ "unit": "m"
+ }
+ },
+ "options": {
+ "graphMode": "none",
+ "textMode": "value",
+ "reduceOptions": { "calcs": ["lastNotNull"] }
+ }
+ },
+ {
+ "id": 6,
+ "title": "Container Migration Latency Profile (Processing Duration)",
+ "type": "timeseries",
+ "description": "How much time it takes the system to successfully copy,
verify, and finalize a single container.",
+ "gridPos": { "x": 0, "y": 14, "w": 24, "h": 7 },
+ "datasource": { "type": "prometheus", "uid": "${datasource}" },
+ "targets": [
+ {
+ "expr":
"{__name__=~\"disk_balancer_service_metrics_copy_success_latency|disk_balancer_service_metrics_copy_failure_latency|disk_balancer_service_metrics_move_success_time_avg_time\",
instance=~\"$datanode.*\"}",
+ "legendFormat": "{{__name__}}",
+ "refId": "A"
+ }
+ ],
+ "fieldConfig": {
+ "defaults": {
+ "unit": "ms",
+ "color": { "mode": "palette-classic" }
+ }
+ }
+ },
+ {
+ "id": 11,
+ "title": "Overall Move Success Rate",
+ "type": "gauge",
+ "description": "The percentage of container moves that finished
perfectly.",
+ "gridPos": { "x": 0, "y": 21, "w": 5, "h": 6 },
+ "datasource": { "type": "prometheus", "uid": "${datasource}" },
+ "targets": [
+ {
+ "expr": "(sum(disk_balancer_service_metrics_success_count) /
(sum(disk_balancer_service_metrics_success_count) +
sum(disk_balancer_service_metrics_failure_count) + 0.00001)) * 100",
+ "instant": true,
+ "refId": "A"
+ }
+ ],
+ "fieldConfig": {
+ "defaults": {
+ "unit": "percent",
+ "min": 0,
+ "max": 100,
+ "thresholds": {
+ "mode": "absolute",
+ "steps": [
+ { "value": 0, "color": "green" },
+ { "value": 80, "color": "red" }
+ ]
+ }
+ }
+ },
+ "options": {
+ "reduceOptions": { "calcs": ["lastNotNull"] }
+ }
+ },
+ {
+ "id": 12,
+ "title": "Total Lifetime Container Moves",
+ "type": "stat",
+ "description": "The total number of individual data blocks (containers)
successfully relocated by the balancer.",
+ "gridPos": { "x": 5, "y": 21, "w": 4, "h": 6 },
+ "datasource": { "type": "prometheus", "uid": "${datasource}" },
+ "targets": [
+ {
+ "expr":
"max_over_time(disk_balancer_service_metrics_success_count{instance=~\"$datanode.*\"}[1h])",
+ "instant": true,
+ "refId": "A"
+ }
+ ],
+ "fieldConfig": {
+ "defaults": {
+ "noValue": "0",
+ "unit": "short"
+ }
+ },
+ "options": {
+ "graphMode": "none",
+ "textMode": "value",
+ "reduceOptions": { "calcs": ["lastNotNull"] }
+ }
+ },
+ {
+ "id": 14,
+ "title": "Total Lifetime Data Balanced",
+ "type": "stat",
+ "description": "The total physical weight of all the data successfully
shifted across the disks since the balancer started.",
+ "gridPos": { "x": 9, "y": 21, "w": 5, "h": 6 },
+ "datasource": { "type": "prometheus", "uid": "${datasource}" },
+ "targets": [
+ {
+ "expr":
"max_over_time(disk_balancer_service_metrics_success_bytes{instance=~\"$datanode.*\"}[1h])",
+ "instant": true,
+ "refId": "A"
+ }
+ ],
+ "fieldConfig": {
+ "defaults": {
+ "noValue": "0",
+ "unit": "decbytes"
+ }
+ },
+ "options": {
+ "graphMode": "area",
+ "textMode": "auto",
+ "reduceOptions": { "calcs": ["lastNotNull"] }
+ }
+ },
+ {
+ "id": 15,
+ "title": "Failed Container Moves",
+ "type": "stat",
+ "description": "The number of times a move was aborted due to error.
This should ideally stay at 0.",
+ "gridPos": { "x": 14, "y": 21, "w": 4, "h": 6 },
+ "datasource": { "type": "prometheus", "uid": "${datasource}" },
+ "targets": [
+ {
+ "expr":
"max_over_time(disk_balancer_service_metrics_failure_count{instance=~\"$datanode.*\"}[1h])",
+ "instant": true,
+ "refId": "A"
+ }
+ ],
+ "fieldConfig": {
+ "defaults": {
+ "noValue": "0",
+ "thresholds": {
+ "mode": "absolute",
+ "steps": [
+ { "value": 0, "color": "green" },
+ { "value": 1, "color": "red" }
+ ]
+ }
+ }
+ },
+ "options": {
+ "graphMode": "area",
+ "textMode": "auto",
+ "reduceOptions": { "calcs": ["lastNotNull"] }
+ }
+ },
+ {
+ "id": 13,
+ "title": "Balancer Idle Reason",
+ "type": "piechart",
+ "description": "Shows why the balancer is taking a break. 'Target
Reached' means the disks are already balanced. 'Throttled' means it's slowing
down on purpose so it doesn't overload the server.",
+ "gridPos": { "x": 18, "y": 21, "w": 6, "h": 6 },
+ "datasource": { "type": "prometheus", "uid": "${datasource}" },
+ "targets": [
+ {
+ "expr":
"sum(increase(disk_balancer_service_metrics_idle_loop_no_available_volume_pair_count[15m]))",
+ "instant": true,
+ "legendFormat": "Target Reached",
+ "refId": "A"
+ },
Review Comment:
The descritpion and title does not match what the metric is actually for.
Please update as below.
```suggestion
"id": 13,
"title": "Why DiskBalancer Did Not Move Data",
"type": "piechart",
"description": "Counts scheduler loops where DiskBalancer is still
running but did not queue any container move. 'No Suitable Volume/Container'
increments when the policy cannot find a valid source/destination volume pair
with a movable container (for example, disks are already even, density is below
threshold, or no container matches the allowed states). 'Throttled' increments
when the scheduler deliberately waits because the configured bandwidth limit
was reached.",
"gridPos": { "x": 18, "y": 21, "w": 6, "h": 6 },
"datasource": { "type": "prometheus", "uid": "${datasource}" },
"targets": [
{
"expr":
"sum(increase(disk_balancer_service_metrics_idle_loop_no_available_volume_pair_count[15m]))",
"instant": true,
"legendFormat": "No Suitable Volume/Container",
"refId": "A"
},
```
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