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Dead Letter Queue(DLQ) Handler Service
Dead Letter QueueA Dead Letter Queue (DLQ) is a service implementation utilised in message-based systems to store messages that could not be processed or delivered.For consumer, there may be scenarios in which incoming messages cannot be fully pro...…
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Debug in distributed system (Splunk)
SplunkSplunkindex=application_na sourcetype=fs_newarch_qa source=*gfs-feaid-services*Response Time: index=application_na sourcetype=fs_newarch_prod source=*fs-utilities* eventType=END OR eventType=ERROR | timechart avg(duration)tps:index=applicat...…
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Failure detection and handling in distributed system
Failure detectionIn distributed system, it requires at least two independent sources of information to mark a server dowm. One server is not enough. (It’s not enough to simply say because your node can’t contact another node that the other node is...…
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System design Basic - scale up system
Scale Route1. Single server2. Database (separate Data tier and web traffic tier)Choose which database to use, Nosql or relational databaseNon-relational database might be the right choice if (easy to scale, no join operations): app requires super...…
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kafka & redis
Kafka & Redis cacheKafka Workflow(Two type of events: bulk load & change data) DB2 mainframe | retrieve data bulk load | ...…
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OOD learning
OODmanagement system OODGym, Parking lot, Hotel, Library, Restaurant, etc.When get the problem, think about if there is a management role in the system. If yes, it belongs to management system.This kind of questions are frequently asked in intervi...…
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JavaScript questions
What is ES6?ECMAScript 6 is also known as ES6. It is used to create web applications. It is a programming language based on scripts that supports object-oriented and functional programming styles.ECMA is the standard, JS is the language in practic...…
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Working English
Clarify things when you do not understandI am sorry, I wanted to confirm my understanding of your email below.Are you stating that xxxxx?I just want to ensure I understand your response correctly.Get POC from other propleIf you can't help on this...…
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Daily English
Aug 12, 2024街边Almost stripped on the curb, 差点被马路牙子绊倒now I'm walking on the sidewalk, 人行道 （crosswalk 人行横道）street pole, 街边杆子pedestrain 行人alley 小巷dumpster 超大的那种垃圾箱，fire hydrant消防栓bike racks,停自行车的间隙lifeguard 救生员cones, 圆锥桶，路边封路用的beach unbrella 遮阳伞May 2...…
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Set up Basic Spring Boot Environment
Create a Spring Boot ProjectOpen IntelliJ IDEA, click Create New Project and select Spring Initializr. Then click Next.For the add on dependencies, we can add them later. Click Next and Finish.Change the Java version to your current Java version.A...…
