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OpenTelemetry","\u002Fcompare\u002Fopentelemetry","8.compare\u002F2.opentelemetry",{"title":601,"path":602,"stem":603,"icon":577},"evlog vs LogTape","\u002Fcompare\u002Flogtape","8.compare\u002F3.logtape",{"title":605,"path":606,"stem":607,"icon":577},"evlog vs Winston: formats and request events","\u002Fcompare\u002Fwinston","8.compare\u002F4.winston",{"title":609,"path":610,"stem":611,"icon":577},"evlog vs Consola: reporters and request context","\u002Fcompare\u002Fconsola","8.compare\u002F5.consola",{"id":613,"title":605,"body":614,"description":763,"extension":764,"links":765,"meta":770,"navigation":771,"path":606,"seo":772,"stem":607,"__hash__":773},"docs\u002F8.compare\u002F4.winston.md",{"type":615,"value":616,"toc":756},"minimark",[617,621,626,646,706,710,725,731,735,742,749],[618,619,620],"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.",[622,623,625],"h2",{"id":624},"identify-what-the-configuration-already-does","Identify what the configuration already does",[618,627,628,629,633,634,637,638,645],{},"Winston composes formats through ",[630,631,632],"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 ",[630,635,636],{},"format.json()",". These are reasons to retain it when the pipeline already works. See the ",[639,640,644],"a",{"href":641,"rel":642},"https:\u002F\u002Fgithub.com\u002Fwinstonjs\u002Fwinston",[643],"nofollow","Winston documentation",".",[647,648,649,662],"table",{},[650,651,652],"thead",{},[653,654,655,659],"tr",{},[656,657,658],"th",{},"Existing requirement",[656,660,661],{},"What to check in evlog",[663,664,665,674,682,690,698],"tbody",{},[653,666,667,671],{},[668,669,670],"td",{},"Custom levels",[668,672,673],{},"Map them to four severities and update queries or alerts that depend on the original values.",[653,675,676,679],{},[668,677,678],{},"Format chain",[668,680,681],{},"Decide which transformations become context fields, plugin hooks, or drain serialization.",[653,683,684,687],{},[668,685,686],{},"Custom transport",[668,688,689],{},"Find a matching drain or port the protocol and delivery behavior.",[653,691,692,695],{},[668,693,694],{},"Per-transport level",[668,696,697],{},"Preserve destination-specific filtering explicitly in the delivery configuration.",[653,699,700,703],{},[668,701,702],{},"Exception\u002Frejection handler",[668,704,705],{},"Keep process-level failure handling separate from an individual request's error event.",[622,707,709],{"id":708},"decide-who-assembles-the-final-event","Decide who assembles the final event",[618,711,712,713,716,717,720,721,724],{},"Winston can log a completed object once. The application decides how to collect it. evlog's ",[630,714,715],{},"createLogger()"," provides that accumulator, ",[630,718,719],{},"set()"," adds context, and ",[630,722,723],{},"emit()"," produces the final event. Framework integrations manage that operation lifecycle.",[618,726,727,728,730],{},"Use ",[639,729,51],{"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.",[622,732,734],{"id":733},"migrate-with-observable-checkpoints","Migrate with observable checkpoints",[618,736,737,738,741],{},"Choose one operation and document the output fields consumers require. Configure an evlog ",[639,739,740],{"href":163},"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.",[618,743,744,745,748],{},"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 ",[639,746,747],{"href":562},"Performance reference"," explains the measurements to compare.",[618,750,751,752,755],{},"Use the ",[639,753,754],{"href":575},"logger overview"," to compare the other options before expanding a migration.",{"title":757,"searchDepth":758,"depth":758,"links":759},"",2,[760,761,762],{"id":624,"depth":758,"text":625},{"id":708,"depth":758,"text":709},{"id":733,"depth":758,"text":734},"Compare Winston formats, transports, and custom levels with evlog event accumulation before migrating an existing application.","md",[766],{"label":767,"icon":577,"to":575,"color":768,"variant":769},"Logger overview","neutral","subtle",{},{"icon":577},{"title":605,"description":763},"wYZxB0q4-1bnz_UamuV92YK7vOKEOgM_5Kmsfz28dwg",[775,777],{"title":601,"path":602,"stem":603,"description":776,"icon":577,"children":-1},"Compare LogTape categories, application-owned configuration, context propagation, and testing with evlog request events.",{"title":609,"path":610,"stem":611,"description":778,"icon":577,"children":-1},"Keep Consola for terminal interaction or custom reporters, and evaluate evlog when your application needs accumulated request events.",1791657896249]