pentaho kettle

Today encountered a very tangled problem, online find a bunch of information finally to be resolved, in the spirit of the programmer dedication is now the problem and the solution are written out.If you run Webapp,kettle under Eclipse, the initialization method will browse all the jar packages under/eclispe/plugins. This will cause our program to be slow and difficult to accept. The programmer can not tolerate, at this time we only need at runtime in

Kettle in the conversion and execution order of jobs: 1, a conversion within a job, is executed sequentially. 2. The steps within a transition are executed in parallel. 3. The transaction is not supported in the job, the transaction is supported within the conversion. depending on your business needs, it is often necessary to perform the sequence within the conversion, with the following tips: 1. Executing SQL takes precedence over all steps. 2. Use

Some things to note about using Java code modules in kettle in case you forget. First you need to inherit the Processrow method, similar to the Java Main method, where the code starts and reads and saves variables inside. public boolean Processrow (Stepmetainterface SMI, Stepdatainterface SDI) throws Exception { object[] r = GetRow () ; if (r = = null) { setoutputdone (); return false; } R = Createoutputrow (R, Data.outputRowMeta.size

The kettle of ETL tools extracts data from one database into another database: 1. Open the ETL folder, double-click Spoon.bat start Kettle 2. Resource pool selection, Connaught no choice to cancel 3. Select Close 4. Create a new transformation 5. Configure the required database 6. The data table that needs to be extracted, with the table input to get 7. Select the database and table

Kettle Condition Judgment Flow operation 1. Background According to the position information that the customer uploads, download the standard product information in the position to the customer local database, in order to determine whether the id_instrument is an incremental update or a full amount, according to the different results returned by the query client, perform different operations, if the return record data is greater than 0, then increme

Chinese garbled problem solution when extracting data using kettle When using kettle to extract data from different databases, there are sometimes garbled Chinese problems: The solution is as follows: 1. See if the character set of the database is UTF-8 (the most commonly used character set) 2. If the database settings are still garbled in Chinese, it may be because the default encoding set for the clien

Tags: Options import profile preparation Query str user Lin marginIntroduction to ETL: ETL (extract-transform-load abbreviation, that is, the process of data extraction, transformation, loading) Database to Database The following explains: Kettle Tool Implementation method Case Purpose : Import the EMP table from user Scott under User testuser. Preparation: first create a new table with the same structure as the EMP table in the Scott account under th

Error connecting database [MySQL]: org.pentaho.di.core.exception.KettleDatabaseException:Error occurred while trying to connect to the databaseDriver class ' Org.gjt.mm.mysql.Driver ' could not being found, make sure the ' MySQL ' Driver (jar file) is installed.Org.gjt.mm.mysql.DriverOrg.pentaho.di.core.exception.KettleDatabaseException:Error occurred while trying to connect to the databaseDriver class ' Org.gjt.mm.mysql.Driver ' could not being found, make sure the ' MySQL ' Driver (jar file) i

Tags: style class blog Java http comRecent study of Big data processing, due to the needs of project development, using an easy way to import data from Excel into the database, the development of the use of kettle tools. Kettle Tool installation is very simple, after downloading from the official website, directly extracted to the set of the drive letter can be (if you configure the Java environment variabl

1. Ensure that the job $KETTLE _HOME/KITCHEN.SH-FILE=/DATA1/TESTDATA/TESTKJB.KJB or converted $KETTLE _home/pan.sh-file=/data1/testdata/ TESTKTR.KTR can perform normally under LinuxThis step is configured correctly in the JDK (Ps. Optional configuration of the kettle environment variable, primarily the home directory where the locator is located, without having t

Label: Import an Excel file into a database using the Kettle component 1. achieve Goals Import the contents of the Excel file into the target table, then use Java to invoke the Kettle transformation. The contents of an Excel file are only two columns , as shown in the following scales: watermark/2/text/ahr0cdovl2jsb2cuy3nkbi5uzxqvbmv3zwfzdhn1bg==/font/5a6l5l2t/fontsize/400/fill/i0jbqkfcma==/ Disso

Kettle _ creates a carte service for the sub-Server Create carte in kettle as a windows service item Tip: the function of Carte is to remotely monitor the subserver of kettle extraction status. Download from the official website: Copy the extracted files to the kettle installation directory. We can execute the

42SIndexing SQL Server tables, incrementally extracting the data, takes 10mn 50s, and the speed is also possible.So in the Vertica in the establishment of similar index projection, the effect is not ideal, the speed has not seen a significant increase, so no, this tuning is not.Debug 3, Temp table + Run scriptFull-scale extraction, time consuming 32sIncremental extraction, time consuming 1mn 48s, the speed has greatly increased.Some error resolution methods

Term definition: Transformation ----- Conversion Step ---------------- step Hops -------------- jumper One step is the minimum Execution Unit in kettle, which is used to implement a specified single logical task. A conversion is a mesh structure composed of a batch of steps to implement a relatively complete task. The conversion actually defines the data flow. Let's take a look at an example: Is a conversion. It reads data from text files, filters a

It's hard to use kettle to create a database connection and use admin to create other users to log on. After logging out of kettle and restarting, an error is returned: Invalid byte 1 of 1-byte UTF-8 Sequence Depressed, I checked it online. This is generally caused by A. xml file. Why is this problem? It turns out that the file % appdata % \. Kettle \ repos

Original link1, Introduction kettle kitchen and spanThe first two articles mainly about the transformation of the kettle Spoon and the GUI design of the operation and the operation, also give the demo, then in fact, our application mode may require the server to run as a background process of the ETL task, Just as we traditionally use Windows services to process data, how do we do it with

Java to call kettle, in the Lib quoted Kettle-engine.jar, Log4j.jar and other packages, the test found that there is Kettle-engine.jar This package, log will not be able to write to the journal file, but can be printed to the console, to the online search also has a lot of friends encounter similar problems, finally found in their official website problem descri

specific information for the error is kettle: http://jira.pentaho.com/browse/PDI-1827. This problem also toss for a long time, just start how also can't figure out how this function can be used when the error, then had to intercept from the string of year, month, day information. another confusing problem with this step is that clicking the "test Script" button will give you an error, but you won't get an error when you execute the job and transforma

Label:Previously used is PostgreSQL, because of the speed of the reason, so intends to unify the data into the HDFs, but a write to HDFs is very slow, all write to the local file and then to HDFs is also the same slow, so that this article, will be part of the first in the memory database, And then write to HDFs, so that the speed of data extraction and writing over several times! Well, tell me how to use H2 in kettle. Download H2 First, click to down

Thisstepcalculateschecksumsforoneormorefieldsintheinputstreamandaddsthistotheoutputasanewfield. Calculate the verification code for the columns input by the data stream and use the output as a new column. Wiki: wiki. pentaho. comdisplayEAIAdd + a + checksumOption This step calculates checksums for one or more fields in the input stream and adds this to the output as a new field. calculate the verification code for the column entered by the data stream