etl | fast Expression Templates Library with GPU support | Machine Learning library
kandi X-RAY | etl Summary
kandi X-RAY | etl Summary
Blazing-fast Expression Templates Library (ETL) with GPU support, in C++
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QUESTION
I'm currently building an etl pipeline that pulls data from large oracle tables to mongodb, i want to know exactly what's the difference between JdbcCursor Item reader and Jdbc Paging item reader. which one of them is best suited for large tables. are they thread safe ?
...ANSWER
Answered 2021-Jun-15 at 09:05JdbcCursorItemReader
uses a JDBC cursor (java.sql.ResultSet
) to stream results from the database and is not thread-safe.
JdbcPagingItemReader
reads items in pages of a configurable size and is thread-safe.
QUESTION
I'm doing some ETL, using the standard "Pre-Load" partition pattern: Load the data into a dated partition of a loading
table, then SWITCH that partition into the live
table.
I found these options for the SWITCH command:
...ANSWER
Answered 2021-Jun-15 at 06:44Looks the question was solved by @Larnu's comment, just add it as an answer to close the question.
If you are using Azure SQL Database, then what the error is telling you is true. Azure SQL Databases are what are known as Partially Contained databases; things like their USER objects have their own Password and the LOGIN objects on the server aren't used for connections. The CONNECTION permission is a server level permission, and thus not supported in Azure SQL Databases.
QUESTION
I'm trying to collect on my notebook using xperf. The .etl file is generated. i'm using the "Diag" that includes precise and sampled CPU profiles.
But, when open .etl on WPA, it did not show the "sampled" grap, just precise. Doing some searches, I found this can be related to Hardware Counters used to the sampled timing.
But, my xperf show that pmcsource timing is available:
[![xperf pmcsources output][1]][1]
Does someone have some idea how I can troubleshoot this missing sampled grap? [1]: https://i.stack.imgur.com/fVnNl.png
...ANSWER
Answered 2021-Jun-11 at 14:18According to Microsoft, it was caused by Windows Defender:
We have identified an underlying issue in Windows Defender which we believe to be the root cause for most folks. The fix has already been deployed to Windows Update, the steps to get / verify are below:
- From PowerShell run
Get-MpComputerStatus
Verify AntivirusSignatureVersion is >= 1.341.82.0 a.- If the signature version is < 1.341.82.0 run Windows Update to get the latest version and then reverify
- Reboot
After this profiling should work in ETW based profilers.
QUESTION
I use Nife 1.13.2 for build ETL process between Oracle and PostgresQL.
There is an ExecuteSQL processor for retrieving data from Oracle and a PutDatabaseRecord processor for inserting data to PostgresQL's table. In PostgresQL's processor there configured INSERT_IGNORE option. The name of key column in both tables is DOC_ID. But due to insert operation, from some reason, Nifi generate mistaken name of the column as it is seen from follow line: ON CONFLICT (DOCID) DO NOTHING
Here is whole error:
...ANSWER
Answered 2021-Jun-10 at 11:07QUESTION
I have a hive external partitioned table with following data structure:
...ANSWER
Answered 2021-Jun-08 at 12:06max_version
is of type org.apache.spark.sql.DataFrame
its not Double
. You have to extract value from the DataFrame.
Check below code.
QUESTION
My project is undergoing a transition to a new AWS account, and we are trying to find a way to persist our AWS Glue ETL bookmarks. We have a vast amount of processed data that we are replicating to the new account, and would like to avoid reprocessing.
It is my understanding that Glue bookmarks are just timestamps on the backend, and ideally we'd be able to get the old bookmark(s), and then manually set the bookmarks for the matching jobs in the new AWS account.
It looks like I could get my existing bookmarks via the AWS CLI using:
...ANSWER
Answered 2021-Jun-03 at 14:38I was not able to manually set a bookmark or get a bookmark to manually progress and skip data using the methods in the question above.
However, I was able to get the Glue ETL job to skip data and progress its bookmark using the following steps:
Ensure any Glue ETL schedule is disabled
Add the files you'd like to skip to S3
Crawl S3 data
Comment out the processing steps of your Glue ETL job's Spark code. I just commented out all of the dynamic_frame steps after the initial dynamic frame creation, up until
job.commit()
.
QUESTION
I completed my ETL part in SSIS. Now for data visualization i installed Power BI for dashboards and reports. Also i read research papers and I didn't find anyone related to power Bi. Lastly, Do i need to implement SSAS and SSRS package as well.
...ANSWER
Answered 2021-Mar-29 at 09:21Power BI's strength is data visualisation, and it is likely to be well suited for for using on top of you retail data warehouse.
I'm not sure which research paper you are referring to, but Microsoft has been topping Gartner's Magic Quadrant for Analytics and Business Intelligence Platform for several years now, followed by Tableau and Qlik. If you are interested in reading further around the various platforms, you can download from https://info.microsoft.com/ww-Landing-2021-Gartner-MQ-for-Analytics-and-Business-Intelligence-Power-BI.html?LCID=EN-US
Power BI does not require SSAS or SSRS to run. If you already have SSAS, Power BI can use SSAS as a data source, and it works very well with a live connection, alternatively you can model the semantic layer directly within Power BI itself. Power BI, especially now Paginated reports are included is seen as a cloud based alternative to SQL Server Reporting Server
QUESTION
I'm creating a column in a dataframe that is an array of 4 structs. Any of them could be null, but since I need to have a fixed number of items in this array, I need to clean out the null items after the fact. I'm getting an error when trying to use a UDF to remove the null items though. Here's an example:
Create the data frame, notice one of the "a" value is None
...ANSWER
Answered 2021-May-28 at 13:52No need for UDF. You can use Spark SQL filter
QUESTION
I'm trying to figure out why is output for git diff [branch_name] [hash] different from git diff [hash] while standing on [branch_name]? (Note SHARED folder for diff with [hash] and DWH4DMS folder for diff with [branch_name] and [hash]) Example as follows:
...ANSWER
Answered 2021-May-28 at 12:37Because when you use a single revision, you are not comparing with HEAD
, you compare with what you have on the working tree.
Second theory: There was a renamed file so it is displaying the file path for 2 different revisions.
QUESTION
I am writing a unit test for my ETLs and as a process, I want to test all Dags to make sure that they do not have cycles. After reading Data Pipelines with Apache Airflow by Bas Harenslak and Julian de Ruiter I see they are using DAG.test_cycle(), the DAG here is imported from the module airflow.models.dag but when I run the code I get an error that AttributeError: 'DAG' object has no attribute 'test_cycle'
Here is my code snippet
...ANSWER
Answered 2021-May-27 at 18:39In Airflow 2.0.0
or greater, you could use test_cycle()
function that takes a dag
as argument:
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