spark-etl | Apache Spark based ETL Engine | Data Migration library
kandi X-RAY | spark-etl Summary
kandi X-RAY | spark-etl Summary
The ETL(Extract-Transform-Load) process is a key component of many data management operations, including move data and to transform the data from one format to another. To effectively support these operations, spark-etl is providing a distributed solution.
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Trending Discussions on spark-etl
QUESTION
I want to use copy command to save multiple csv files in parallel to PostgreSQL database. I am able to save a single csv file to PostgreSQL using copy command. I don't want to save the csv files one by one to the PostgreSQL as it would be sequential and I would be wasting the cluster resources as it has lot of computing happening before it reach this state. I want a way by which I can open the csv files on each partition that I have and run multiple copy commands at the same time.
I was able to find one GitHub repo that does something similar so I tried replicating the code but I am getting the error : Task not serializable
The code that I am using is as below :
Import Statements :
...ANSWER
Answered 2021-Mar-20 at 05:11After spending lot of time I was able to make it work.
The changes or the things that I had to do is as below:
- I had to create an object that extends from Serializable.
- I had to create a function that is performing the copy operation inside foreachpartition inside that object.
- call that function and it was working fine.
Below is the code that I have written to make it work.
QUESTION
I have read here that now Glue provides the ability to rewind job bookmarks for Spark ETL job.
Still, I haven't been able to find any information on how to do that. The sub-options in the "paused" job bookmark option seem to be useful in rewinding a job bookmark, but I can't find how to implement them (I am using Glue console.)
...ANSWER
Answered 2019-Nov-01 at 07:37What you need to pass following parameters in "Job parameters" section. With job bookmarks enabled.
job-bookmark-from
is the run ID which represents all the input that was processed until the last successful run before and including the specified run ID.
job-bookmark-to
is the run ID which represents all the input that was processed until the last successful run before and including the specified run ID. The corresponding input excluding the input identified by the is processed by the job.
QUESTION
I have packaged my application into a jar file, however, when I try to execute it, the application fails with this error:
...ANSWER
Answered 2019-Feb-15 at 09:48Downgrading Scala to 2.11 solved the issues. I guess there are some problems with Kafka dependencies for Scala 2.12
QUESTION
I am using SBT 1.8.0 for my spark scala project in intellij idea 2017.1.6 ide. I want to create a parent project and also its children project modules. So far this is what I have in my build.sbt:
...ANSWER
Answered 2018-Nov-23 at 13:25My multi-module project uses the parent project only for building everything and delegate run to the 'server' project:
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Install spark-etl
sbt clean assembly
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