Collectors

There are a number of drivers to support different collector backends:

Redis:

• Overview

  The Redis driver allows profiling data to be collected into a redis database instance. The traces are stored as key-value pairs where the key is a string built using trace ids and timestamps and the values are JSON strings containing the trace information. A second driver is included to use Redis Sentinel in addition to single node Redis.

• Capabilities:

  • Write trace data to the database.
  • Query Traces in database: This allows for pulling trace data querying on the keys used to save the data in the database.
  • Generate a report based on the traces stored in the database.
  • Supports use of Redis Sentinel for robustness.

• Usage:

  The driver is used by OSProfiler when using a connection-string URL of the form redis://<hostname>:<port>. To use the Sentinel version use a connection-string of the form redissentinel://<hostname>:<port>

• Configuration:

  • No config changes are required by for the base Redis driver.

  • There are two configuration options for the Redis Sentinel driver:

    • socket_timeout: specifies the sentinel connection socket timeout value. Defaults to: 0.1 seconds
    • sentinel_service_name: The name of the Sentinel service to use. Defaults to: “mymaster”