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Hello Gonzalo, Yes I was thinking same to call lambda as part of UDF . Thanks for confirming this. Just one more thing I would like to ask , will these call to lambda be synchronous .
Lets say if I have 100 rows in dataframe . Then lambda will called 100 times in parallel for each row and whole process gets completed once we get result for each row ( be it correct result or failure ).
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Yes, you can call lambda via boto3 inside your Glue code.
The issue is that if you do it distributed on the data (if you mean Glue for Spark) is a bit more complicated and you are likely to get throttling errors and much higher cost than if you did that same lambda code inside a Glue udf (or even better SparkSQL)
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The parallelism depends on the number of partitions in Spark. It won't complete the job until all are partitions and rows are complete