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Environment VariablesA 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 OverridesGOOGLE_CLOUD_CPP_PARALLELSTORE_ENDPOINT=... overrides the EndpointOption (which defaults to "parallelstore.googleapis.com") used by MakeParallelstoreConnection().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.
google::cloud::LoggingComponentsOptionGOOGLE_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.
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.
GOOGLE_CLOUD_PROJECT=...: is used in examples and integration tests to configure the GCP project. This has no effect in the library.
Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.
Last updated 2025-08-14 UTC.
[[["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 2025-08-14 UTC."],[[["This page details the environment variables available for configuring the behavior of the Parallelstore C++ library, alongside the functions that can perform the same configurations directly in code."],["The `GOOGLE_CLOUD_CPP_PARALLELSTORE_ENDPOINT` environment variable allows users to override the default endpoint used by `MakeParallelstoreConnection()`, enabling connection to alternative services."],["Users can enable detailed gRPC call tracing using `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc`, which also requires `GOOGLE_CLOUD_CPP_ENABLE_CLOG` for console output unless a custom logging backend is in place."],["`GOOGLE_CLOUD_CPP_TRACING_OPTIONS` can be set to change how the gRPC tracing messages are displayed, such as formatting and truncation, and setting `GOOGLE_CLOUD_CPP_ENABLE_CLOG=yes` will actually turn on logging for the library."],["A list of previous versions of the documentation are available, starting from 2.31.0 to the latest release candidate at 2.37.0-rc, with each version having its own documentation."]]],[]]
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