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AWS Service Health Dashboard

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  • 时间:2019-08-13
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简介 AmazonS3AvailabilityEvent:July20,2008Wewantedtoprovidesomeadditionaldetailabouttheproblemweexper

AWS Service Health Dashboard

AmazonS3AvailabilityEvent:July20,2008WewantedtoprovidesomeadditionaldetailabouttheproblemweexperiencedonSunday,:40amPDT,errorrate:50amPDT,errorratesweresi:55amPDT,,wetri,:41amPDT,wedeterminedthatse,AmazonS3usesagossipps,srequest,,wesawalargenumberofserversthatwerespendingalmostalloftheirtimegossipin,AmazonS3wasn:32amPDT,afterexploringseveraloptions,wedeterminedthatweneededtoshutdownallcommunicationbetweenAmazonS3servers,shutdownallcomponentsusedforrequestprocessing,clearthesystemsstate,:05amPDT,allserver-to-servercommunicationwasstopped,requestprocessingcomponentsshutdown,andthesystem:20pmPDT,wedrestoredinternalcommunicationbetweenallAmazonS3serversandbeganreac:57pmPDT,AmazonS3:10pmPDT,:02pmPDT,AmazonS3sUSlocationbegansuccessfullycompletingcustomerrequests,andrequestratesanderrorrateshadreturnedtonormalby4:venowdeterminedthatmessage,wefoundthattherewereahandfulofmessagesonSundaymorningthathadasinglebitcorruptedsuchthatthemessagewasstillintelligible,,forexample,toprevent,detect,andrecoverfromcorruptionthatcanoccurduringreceipt,storage,andretrievalofcustomers,wedidnthavethesameprotectioninplacetodete,whenthecorruptionoccurred,wedidntdetectitencounteredserver-to-servercommunicationissuesofthisscalebeforeand,asaresult,vespentquiteabitoftimeevaluatingwhathappened,howquicklywewereabletorespondandrecover,andwhatwecoulddotopreveretaking:(a)wevedeployedseveralchangestoAmazonS3thatsignificantlyreducetheamountoftimerequiredtocompletelyrestoresystem-widestateandrestartcustomerrequestprocessing;(b)wevedeployedachangetohowAmazonS3gossipsaboutfailedserversthatreducestheamountofgossipandhelpspreventthebehaviorweexperiencedonSunday;(c)weveaddedadditionalmonitoringandalarmingofgossipratesandfailures;and,(d)wereaddingchecksumstoproactivelydetectcorruption,wewantyoutoknowthatwearepassionateaboutprovidingthebeststorageserviceatthebestpricesothatyoucanspendmoretimethinkingaboutyourbusinessratherthanhavingtofocusonbuildingscalable,,weknowthatanydowntimeisunacceptableandwewontbesatis,TheAmazonS3Team。

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