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Last modified by Erik Bakker on 2023/09/29 08:51
From version 15.2
edited by Erik Bakker
on 2023/09/11 13:45
Change comment: Update document after refactoring.
To version 17.1
edited by Erik Bakker
on 2023/09/11 13:56
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1 -advanced-monitoring-eventstreaming-partition-size-and-consumer-lag-exercise
1 +Monitor partition size and consumer lag
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1 1  {{container}}{{container layoutStyle="columns"}}(((
2 -This exercise will provide you with practical guidance on the use of SpEL expressions within the eMagiz platform.
2 +This exercise will provide practical guidance on interpreting the event streaming statistics overview, specifically around partition size and consumer lag.
3 3  
4 4  Should you have any questions, please contact [[academy@emagiz.com>>mailto:academy@emagiz.com]].
5 5  
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6 6  == 1. Prerequisites ==
7 7  
8 8  * Completed previous exercises and microlearnings
9 -* Access to an eMagiz model
9 +* Access to an eMagiz model with an Event Streaming license
10 +* At least one configured topic on which something produces data and some other thing consumes data
10 10  
11 11  == 2. Exercise ==
12 12  
13 -Import the following store elements related to SpEL expressions in a flow and determine what they intend to achieve within the flow.
14 +Navigate to Manage -> Monitoring -> Event Streaming Statistics for the model you selected to execute this exercise. Here, analyze the partition size and consumer lag on at least one topic.
14 14  
15 -* [[Contains>>doc:Main.eMagiz Store.Accelerators.Contains - SpEL.WebHome||target="blank"]]
16 -* [[Current Date Time>>doc:Main.eMagiz Store.Accelerators.Current DateTime - SpEL.WebHome||target="blank"]]
17 -* [[Elvis Operator>>doc:Main.eMagiz Store.Accelerators.Elvis Operator - SpEL.WebHome||target="blank"]]
16 +{{info}}Given that the implementation of the prerequisites can differ, the results of what you see can also differ. We use example data that is part of our Sales Demo model to feed the Vehicle Event topic. An event processor subsequently determines whether a vehicle alert needs to be generated based on the type of event. This accounts for the difference in partition size between both topics. An event processor is a consumer group, and due to the high volume of messages placed on the Vehicle Event topic, we see that a consumer lag is reported.{{/info}}
18 18  
19 19  == 3. Solution ==
20 -In this short movie, you will find the workout of this exercise. Take a moment to review this one and compare it to your solution.
19 +In this short movie, you will find the workout of this exercise. Please take a moment to review this one and compare it to your solution.
21 21  
22 -{{video attachment="advanced-data-handling-spel-expressions.mp4" reference="Main.Videos.Microlearning.WebHome"/}}
21 +{{video attachment="advanced-monitoring-eventstreaming-partition-size-and-consumer-lag-exercise.mp4" reference="Main.Videos.Microlearning.WebHome"/}}
23 23  
24 24  )))((({{toc/}}))){{/container}}{{/container}}