A number of environment variables can be used to configure the behavior of the library. There are also functions to configure this behavior in code. The environment variables are convenient when troubleshooting problems.
Endpoint Overrides
GOOGLE_CLOUD_CPP_DATA_MIGRATION_SERVICE_ENDPOINT=... overrides the EndpointOption (which defaults to "datamigration.googleapis.com") used by MakeDataMigrationServiceConnection().
GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc: turns on tracing for most gRPC calls. The library injects an additional Stub decorator that prints each gRPC request and response. Unless you have configured your own logging backend, you should also set GOOGLE_CLOUD_CPP_ENABLE_CLOG to produce any output on the program's console.
See Also
google::cloud::TracingComponentsOptionGOOGLE_CLOUD_CPP_TRACING_OPTIONS=...: modifies the behavior of gRPC tracing, including whether messages will be output on multiple lines, or whether string/bytes fields will be truncated.
See Also
google::cloud::GrpcTracingOptionsOptionGOOGLE_CLOUD_CPP_ENABLE_CLOG=yes: turns on logging in the library, basically the library always "logs" but the logging infrastructure has no backend to actually print anything until the application sets a backend or they set this environment variable.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-03-21 UTC."],[[["This document outlines environment variables and configuration options for the data migration library, with version 2.37.0-rc being the latest version available."],["You can override the default endpoint for the `DataMigrationService` using the `GOOGLE_CLOUD_CPP_DATA_MIGRATION_SERVICE_ENDPOINT` environment variable."],["The document details how to enable gRPC call tracing and configure its behavior through the `GOOGLE_CLOUD_CPP_ENABLE_TRACING` and `GOOGLE_CLOUD_CPP_TRACING_OPTIONS` environment variables, respectively."],["Logging within the library can be activated using the `GOOGLE_CLOUD_CPP_ENABLE_CLOG` variable, allowing for troubleshooting."],["The list includes a range of versions available, starting from the latest 2.37.0-rc down to 2.11.0."]]],[]]
