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_PARALLELSTORE_ENDPOINT=...overrides theEndpointOption(which defaults to "parallelstore.googleapis.com") used byMakeParallelstoreConnection().
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 setGOOGLE_CLOUD_CPP_ENABLE_CLOGto produce any output on the program's console.
See Also
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.
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 2025-09-04 UTC."],[[["\u003cp\u003eThis 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.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eGOOGLE_CLOUD_CPP_PARALLELSTORE_ENDPOINT\u003c/code\u003e environment variable allows users to override the default endpoint used by \u003ccode\u003eMakeParallelstoreConnection()\u003c/code\u003e, enabling connection to alternative services.\u003c/p\u003e\n"],["\u003cp\u003eUsers can enable detailed gRPC call tracing using \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc\u003c/code\u003e, which also requires \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_CLOG\u003c/code\u003e for console output unless a custom logging backend is in place.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eGOOGLE_CLOUD_CPP_TRACING_OPTIONS\u003c/code\u003e can be set to change how the gRPC tracing messages are displayed, such as formatting and truncation, and setting \u003ccode\u003eGOOGLE_CLOUD_CPP_ENABLE_CLOG=yes\u003c/code\u003e will actually turn on logging for the library.\u003c/p\u003e\n"],["\u003cp\u003eA 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.\u003c/p\u003e\n"]]],[],null,["Version 2.31.0keyboard_arrow_down\n\n- [2.42.0-rc (latest)](/cpp/docs/reference/parallelstore/latest/parallelstore-env)\n- [2.41.0](/cpp/docs/reference/parallelstore/2.41.0/parallelstore-env)\n- [2.40.0](/cpp/docs/reference/parallelstore/2.40.0/parallelstore-env)\n- [2.39.0](/cpp/docs/reference/parallelstore/2.39.0/parallelstore-env)\n- [2.38.0](/cpp/docs/reference/parallelstore/2.38.0/parallelstore-env)\n- [2.37.0](/cpp/docs/reference/parallelstore/2.37.0/parallelstore-env)\n- [2.36.0](/cpp/docs/reference/parallelstore/2.36.0/parallelstore-env)\n- [2.35.0](/cpp/docs/reference/parallelstore/2.35.0/parallelstore-env)\n- [2.34.0](/cpp/docs/reference/parallelstore/2.34.0/parallelstore-env)\n- [2.33.0](/cpp/docs/reference/parallelstore/2.33.0/parallelstore-env)\n- [2.32.0](/cpp/docs/reference/parallelstore/2.32.0/parallelstore-env)\n- [2.31.0](/cpp/docs/reference/parallelstore/2.31.0/parallelstore-env) \n\nEnvironment Variables\n=====================\n\nA 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.\n\nEndpoint Overrides\n------------------\n\n- `GOOGLE_CLOUD_CPP_PARALLELSTORE_ENDPOINT=...` overrides the `EndpointOption` (which defaults to \"parallelstore.googleapis.com\") used by `MakeParallelstoreConnection()`.\n\n###### See Also\n\n[`google::cloud::EndpointOption`](https://cloud.google.com/cpp/docs/reference/common/latest/structgoogle_1_1cloud_1_1EndpointOption.html)\n\nLogging\n-------\n\n`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.\n\n###### See Also\n\n[`google::cloud::LoggingComponentsOption`](https://cloud.google.com/cpp/docs/reference/common/latest/structgoogle_1_1cloud_1_1LoggingComponentsOption.html)`GOOGLE_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.\n\n###### See Also\n\n[`google::cloud::GrpcTracingOptionsOption`](https://cloud.google.com/cpp/docs/reference/common/latest/structgoogle_1_1cloud_1_1GrpcTracingOptionsOption.html)`GOOGLE_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.\n\n###### See Also\n\n[`google::cloud::LogBackend`](https://cloud.google.com/cpp/docs/reference/common/latest/classgoogle_1_1cloud_1_1LogBackend.html)\n\n###### See Also\n\n[`google::cloud::LogSink`](https://cloud.google.com/cpp/docs/reference/common/latest/classgoogle_1_1cloud_1_1LogSink.html)\n\nSetting the Default Project\n---------------------------\n\n`GOOGLE_CLOUD_PROJECT=...`: is used in examples and integration tests to configure the GCP project. This has no effect in the library."]]
