Page Comparison

This is not for 3.4 release.

The goal of this page is to document the design of the Tracker Audit Metrics.

Use-Cases

1. As a user of Tracker, I would like to see total number of audit messages by type/subtype in the past T timeframe.
   1. "Show me the total number of reads in the system in the past 1 hour."
2. As a user of Tracker, I would like to see the top N datasets/streams by audit message type/subtype activity in the past T timeframe.
   1. "Show me the 5 datasets with the most writes in the past 24 hours."
   2. "Show me the 5 streams with the most metadata_changes in the past 7 days."
3. As a user of Tracker, I would like to see the top N namespaces with the most type/subtype activity in the past T timeframe.
   1. "Show me the 5 namespaces with the most reads in the past 1 hour."
4. As a user of Tracker, I would like to see the top N programs reading/writing to a specific dataset in the past T timeframe.
   1. "Show me the top 5 programs writing to dataset1 in the past 1 hour."

Initial High Level Plan

• As messages come from the Kafka broker and are written to the AuditLog Table, when a message matches one of the metrics criteria, update metrics in a separate OLAP Cube (but the same dataset) as required.
• In the service layer, expose a new endpoint that allows users to query the data in the metrics table and returns the results in JSON.

Storing Metrics in AuditLog Dataset

• Add an additional Cube table to the AuditLog custom dataset to hold metrics.
• The properties of the cube will be as follows
  • Resolutions: 1h, 6h, 24h, 1w, 1m, 3m, 6m, 1y
  • Aggs: 
    • namespace (default ns1 ns2)
    • namespace,entity_type,entity_name (default,stream,stream1 default,dataset,dataset1)
    • namespace,entity_type,entity_name,program (default,stream,stream1,program1 default,dataset,dataset1,program2)
  • Measurements: 
    • access
    • read
    • write
    • unknown
    • create
    • update
    • truncate
    • delete
    • metadata_change
    • count
• Queries to OLAP cube
  • "Show me the total number of reads in the system in the past 1 hour."

    • {
          "aggregation": "agg2",
          "resolution": 3600,
          "startTs": now,
          "endTs":   now-1h,
          "measurements": {"access_reads": "SUM"},
          "limit": 1
      }

       

  • "Show me the 5 datasets with the most writes in the past 24 hours."

    • {
          "aggregation": "agg2",
          "resolution": 86400,
          "startTs": now,
          "endTs":   now-24h,
          "measurements": {"access_writes": "SUM"},
       "dimensionValues" : { "entity_type" : "dataset" },
       "groupByDimensions": ["namespace","entity_type","entity_name"],
       "limit" : 10000
      }

    • Results then sorted and top 5 returned

  • "Show me the 5 streams with the most metadata_changes in the past 7 days."

    • {
          "aggregation": "agg2",
          "resolution":604800,
          "startTs": now,
          "endTs":   now-7d,
          "measurements": {"metadata_changes": "SUM"},
       "dimensionValues" : { "entity_type" : "stream" },
       "groupByDimensions": ["namespace","entity_type","entity_name"],
       "limit" : 10000
      }

    • Results then sorted and top 5 returned

  • "Show me the 5 namespaces with the most reads in the past 1 hour."

    • {
          "aggregation": "agg2",
          "resolution":86400,
          "startTs": now,
          "endTs":   now-1h,
          "measurements": {"access_reads": "SUM"},
       "groupByDimensions": ["namespace"],
       "limit" : 10000
      }

    • Results then sorted and top 5 returned

Endpoints

[
  {
    "namespace": "default",
    "entityType": "09ed6ccb-fd1a-11e5-a248-0000003b6093",
    "entityName": "AuditMetrics",
    "columnValues": {
      "count": 15,
      "unknown": 15,
      "access": 15
    }
  },
  {
    "namespace": "default",
    "entityType": "b78f346d-fa88-11e5-b588-2ef89310f408",
    "entityName": "AuditLog",
    "columnValues": {
      "count": 12,
      "unknown": 12,
      "access": 12
    }
  },
  {
    "namespace": "default",
    "entityType": "application",
    "entityName": "CDAPToSlack",
    "columnValues": {
      "count": 10,
      "metadata_change": 10
    }
  },
  ...
]