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OpenTelemetry","\u002Fcompare\u002Fopentelemetry","8.compare\u002F2.opentelemetry",{"title":596,"path":597,"stem":598,"icon":572},"evlog vs LogTape","\u002Fcompare\u002Flogtape","8.compare\u002F3.logtape",{"title":600,"path":601,"stem":602,"icon":572},"evlog vs Winston: formats and request events","\u002Fcompare\u002Fwinston","8.compare\u002F4.winston",{"title":604,"path":605,"stem":606,"icon":572},"evlog vs Consola: reporters and request context","\u002Fcompare\u002Fconsola","8.compare\u002F5.consola",{"id":608,"title":600,"body":609,"description":758,"extension":759,"links":760,"meta":765,"navigation":766,"path":601,"seo":767,"stem":602,"__hash__":768},"docs\u002F8.compare\u002F4.winston.md",{"type":610,"value":611,"toc":751},"minimark",[612,616,621,641,701,705,720,726,730,737,744],[613,614,615],"p",{},"Your Winston configuration may encode years of operational decisions: which fields reach a backend, which errors trigger alerts, and which transports receive each severity. Start a migration by preserving those decisions.",[617,618,620],"h2",{"id":619},"identify-what-the-configuration-already-does","Identify what the configuration already does",[613,622,623,624,628,629,632,633,640],{},"Winston composes formats through ",[625,626,627],"code",{},"logform",", supports custom levels, and configures multiple transports with their own levels. It also offers child loggers, profiling, and exception\u002Frejection handlers. JSON output is available through ",[625,630,631],{},"format.json()",". These are reasons to retain it when the pipeline already works. See the ",[634,635,639],"a",{"href":636,"rel":637},"https:\u002F\u002Fgithub.com\u002Fwinstonjs\u002Fwinston",[638],"nofollow","Winston documentation",".",[642,643,644,657],"table",{},[645,646,647],"thead",{},[648,649,650,654],"tr",{},[651,652,653],"th",{},"Existing requirement",[651,655,656],{},"What to check in evlog",[658,659,660,669,677,685,693],"tbody",{},[648,661,662,666],{},[663,664,665],"td",{},"Custom levels",[663,667,668],{},"Map them to four severities and update queries or alerts that depend on the original values.",[648,670,671,674],{},[663,672,673],{},"Format chain",[663,675,676],{},"Decide which transformations become context fields, plugin hooks, or drain serialization.",[648,678,679,682],{},[663,680,681],{},"Custom transport",[663,683,684],{},"Find a matching drain or port the protocol and delivery behavior.",[648,686,687,690],{},[663,688,689],{},"Per-transport level",[663,691,692],{},"Preserve destination-specific filtering explicitly in the delivery configuration.",[648,694,695,698],{},[663,696,697],{},"Exception\u002Frejection handler",[663,699,700],{},"Keep process-level failure handling separate from an individual request's error event.",[617,702,704],{"id":703},"decide-who-assembles-the-final-event","Decide who assembles the final event",[613,706,707,708,711,712,715,716,719],{},"Winston can log a completed object once. The application decides how to collect it. evlog's ",[625,709,710],{},"createLogger()"," provides that accumulator, ",[625,713,714],{},"set()"," adds context, and ",[625,717,718],{},"emit()"," produces the final event. Framework integrations manage that operation lifecycle.",[613,721,722,723,725],{},"Use ",[634,724,51],{"href":52}," to decide whether this model removes code from your handlers. It does not automatically preserve a Winston output schema, and changing several records into one may require new dashboard queries.",[617,727,729],{"id":728},"migrate-with-observable-checkpoints","Migrate with observable checkpoints",[613,731,732,733,736],{},"Choose one operation and document the output fields consumers require. Configure an evlog ",[634,734,735],{"href":158},"drain adapter",", then exercise success and failure against a test destination. Confirm that redaction, severity mapping, retries, and process shutdown meet the same requirements as the existing path.",[613,738,739,740,743],{},"Keep Winston when format composition or custom transports already solve the problem. Consider evlog when accumulated context, structured errors, and its integration lifecycle reduce application code. Neither a library's age nor unequal-output benchmarks establish which is better for your workload. The ",[634,741,742],{"href":557},"Performance reference"," explains the measurements to compare.",[613,745,746,747,750],{},"Use the ",[634,748,749],{"href":570},"logger overview"," to compare the other options before expanding a migration.",{"title":752,"searchDepth":753,"depth":753,"links":754},"",2,[755,756,757],{"id":619,"depth":753,"text":620},{"id":703,"depth":753,"text":704},{"id":728,"depth":753,"text":729},"Compare Winston formats, transports, and custom levels with evlog event accumulation before migrating an existing application.","md",[761],{"label":762,"icon":572,"to":570,"color":763,"variant":764},"Logger overview","neutral","subtle",{},{"icon":572},{"title":600,"description":758},"wYZxB0q4-1bnz_UamuV92YK7vOKEOgM_5Kmsfz28dwg",[770,772],{"title":596,"path":597,"stem":598,"description":771,"icon":572,"children":-1},"Compare LogTape categories, application-owned configuration, context propagation, and testing with evlog request events.",{"title":604,"path":605,"stem":606,"description":773,"icon":572,"children":-1},"Keep Consola for terminal interaction or custom reporters, and evaluate evlog when your application needs accumulated request events.",1791240220181]