—Using the Event Replicator Target Adapter—
You can use the Teradata MultiLoad (MLoad) utility to process and load initial-state data into a Teradata database. The MLoad utility can only be used with the Event Replicator Target Adapter to load initial-state data; it cannot be used for transactional data. It can load UTF8 data.
Note:
The MLoad utility is supported in Windows environments only. In addition, composite keys are not supported when using the MLoad utility with Event Replicator Target Adapter.
This document covers the following topics:
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Prerequisites
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Limitations
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Enabling Teradata MLoad Utility Initial-State Processing
(Video) teradata multiload -
Processing Output
Prerequisites
The following prerequisites must be met before the Teradata MLoad utility can be used to load initial-state data to a Teradata database, via the Event Replicator Target Adapter:
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The Teradata utilities supporting the MLoad utility must be installed on the same machine as the Event Replicator Target Adapter.
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Be sure there is enough space to accommodate the DAT files that will be created by this processing.
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After installing the Teradata MLoad utility, it must be configured. According to Teradata MLoad utility configuration rules, you should add entries in the Windows HOSTS file that map the TDPIDs (Teradata Director Program Identifier) with the Teradata databases and their hosts. When the MLoad utility is invoked for a particular target, the Event Replicator Target Adapter will relay the TDPID provided in the Loader section of the Target Database Options entry definition (in Event Replicator Target Adapter Administration) into the Teradata .login command. For example:
## This is a sample HOSTS file used by Microsoft TCP/IP for Windows.#127.0.0.1 localhostn.n.n.n tdpid tdpidcop1
The following substitutions are used in this example:
Term Description n.n.n.n The specific TCP/IP address for the named TDPID where the Teradata database expected to interact with the MLoad utility is running. tdpid The Teradata Director Program Identifier (TDPID); usually the first eight characters of the Teradata database name or the Teradata service name. Teradata database names can be up to 30 characters long. However, MLoad restrictions for Teradata releases up to Version 12 require that TDPIDs be eight (8) characters or less.
Event Replicator Target Adapter current logic dynamically determines the TDPID using the first eight characters of the Teradata service name specified in the Loader options of the database option definition created using the Event Replicator Target Adapter Administration tool. If you do not supply a service name, the first eight characters of the Teradata database name is used.
Whatever TDPID is used must also be present in the HOSTS file. Be sure that the specifications in the database option definition and the specification in the HOSTS file match.
tdpidcop1 Teradata requires that you specify a second parameter in the format tdpidcop1, where tdpid is the TDPID you specified above and "cop1" is a literal. For example, if you specify "A2345678" as your TDPID, you would specify "A2345678cop1" for this parameter.
Limitations
You can only use the MLoad utility to load initial-state data if:
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Composite keys are not used in the data.
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You are running Event Replicator Target Adapter, Teradata, and the MLoad utility in Windows environments.
(Video) FASTLOAD Utility in Teradata ---Step by Step Explanation
Enabling Teradata MLoad Utility Initial-State Processing
To enable Teradata MLoad utility initial-state processing, complete the following steps:
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Using the Administration tool, configure a target definition for your Teradata database. For more information, read Configuring Target Definitions for Event Replicator Target Adapter.
Note:
If you intend to load UTF-8 data to your Teradata database, be sure you have applied the appropriate Event Replicator Target Adapter hot fix and that you have specified the "CHARSET=utf8" parameter in the data source URL. For more information about the hot fixes that support this, refer to the README file provided with Event Replicator Target Adapter. -
Using the Administration tool, create a specific target processing option definition for your Teradata database. For this definition you must:
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Select the Convert Hyphen option (check it) on the target processing option definition panel.
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In the Loader options area of the target processing option definition panel, select the Use Loader check box (check it).
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In the Loader options area of the target processing option definition panel, specify the Teradata Director Program Identifier (TDPID) in the Oracle Service or Teradata Tdpip field. This is usually the first eight characters of the Teradata database name or the Teradata service name. Teradata database names can be up to 30 characters long. However, MLoad restrictions for Teradata releases up to Version 12 require that TDPIDs be eight (8) characters or less. Event Replicator Target Adapter current logic dynamically determines the TDPID using the first eight characters of the name specified in this field. If you do not supply a name, the first eight characters of the Teradata database name is used. Whatever TDPID is used must also be present in the HOSTS file.
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In the Loader options area, provide a value for the Path to Loader Executable field, identifying the full path of the Teradata MLoad utility executable. For example:
C:\Program Files\NCR\teradata client\bin\mload.exe
Save the target processing option definition with the same name as the target definition you created in Step 1.
(Video) Teradata Tutorial in 3 Hours | Teradata Tutorial for beginners | Teradata complete training | SQL -
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When all processing options are specified, start initial-state processing, directing the output to the Event Replicator Target Adapter via a GFFT you created (using the Data Mapping Tool or the Adabas Event Replicator Subsystem) for the Teradata database.
For more information on this, read Requesting Initial-State Data.
The Event Replicator Target Adapter will collect the initial-state records and send them to the Teradata MLoad utility to be loaded to your Teradata database.
Note:
Some errors might prevent the MLoad utility from restoring primary and foreign keys, indexes, and the unique index of tables. We recommend that you examine the MLoad utility log files to determine if such an error occurred. For more information, read Processing Output.
Processing Output
The output from this processing includes:
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Various MLoad utility processing files
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MLoad utility log files from the processing
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Data files (.mlddat files) containing the initial-state data received by the Event Replicator Target Adapter prior to being processed by the MLoad utility.
All output files are written to the \logs subdirectory of your Event Replicator Target Adapter installation.
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Processing Files
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Log Files
Processing Files
The Event Replicator Target Adapter’s MLoad utility processing creates three processing files per table loaded. The following processing files are stored in the \logs subdirectory of your Event Replicator Target Adapter installation:
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xxxx.bat (where xxxx is the table name) file: This .bat file is used to run the MLoad utility.
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xxxx.mldctl (where xxxx is the table name) file: This is the control file for the MLoad utility processing.
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One or more xxxx.mlddat (where xxxx is the table name) files: These files contain the data to be loaded to the database tables by the MLoad utility. These files can take a good deal of space, so make sure that there is enough space to accommodate them and be sure to manually delete them when initial-state processing has completed successfully.
Log Files
Two kinds of log files are produced by Event Replicator Target Adapter MLoad utility processing: a primary log file and multiple processing log files. All log files are stored in the \logs subdirectory of your Event Replicator Target Adapter installation.
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The Teradata MLoad utility primary log files make references to the processing log files. The primary log files have names in the format xxxx_yymmdd_hhmmss.out, where xxxx is the table name, yymmdd is the date of the log file, and hhmmss is the time the log file was last updated. We recommend that you review these primary log files carefully to ensure that the MLoad utility had no problems restoring primary and foreign keys, indexes, or the unique index of tables. If MLoad utility processing fails for some reason, we recommend reviewing these primary .out log files first when resolving the problem, proceeding then to the processing log files, as necessary.
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Multiple processing log files are created, one for each MLoad process executed by the Event Replicator Target Adapter. These processing log files have names in the format Multiloadprocess-yyyy-mm-dd-hh-mm-ss-nnnn.log, where yyyy-mm-dd is the processing date (year, month, and day) and hh-mm-ss-nnnn represents the processing time (hours, minutes, seconds, and milliseconds).
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FAQs
How many tables are created during loading a table with Mload utility? ›
It can load up to 5 tables at a time and perform up to 20 DML operations in a script. The target table is not required for MultiLoad.
What is the difference between fast load and Mload? ›267. What is the difference between Multiload & Fastload in terms of Performance? Fastload is used to load empty tables and is very fast, can load one table at a time. Multiload can load at max 5 tbls at a time and can also update and delete the data.
Does MultiLoad have data retrieval capability? ›No data retrieval capability. The Multiload supports five target tables per script. Tables may contain pre-existing data. Ability to do INSERTs UPDATEs, DELETEs and UPSERTs.
What is the difference between FastLoad and MultiLoad in Teradata? ›Fastload can only load into empty tables. Multiload can also load data into populated tables but support only NUSIs on the table. Multiload loads the data into work tables. Prepares the data block wise and apply whole block changes.
How to load data from one table to another table in Teradata? ›- INSERT INTO table2.
- SELECT (column1, column2, column3) FROM table1;
- or.
- INSERT INTO table2 (columna, column b, column c)
- SELECT (column1, column2, column3) FROM table1;
Upto 5 empty/populated tables can be loaded at a time but delete can be done from single table only. Update operator does not discard duplicate rows, it will be inserted into target table if target table is MULTISET and it will be inserted into error table if target table is SET.
How to fast load in Teradata? ›- LOGON − Logs into Teradata and initiates one or more sessions.
- DATABASE − Sets the default database.
- BEGIN LOADING − Identifies the table to be loaded.
- ERRORFILES − Identifies the 2 error tables that needs to be created/updated.
- CHECKPOINT − Defines when to take checkpoint.
Teradata FastLoad is used to load a large amount of data in an empty table on a Teradata System or load data from the client to the Database system. It allows fast loading of a single empty table with no SIs, JIs, HIs, or RI (FKs) or column partitioning.
What are the different types of loading in Teradata? ›FastLoad: Quickly loads large volumes of data to empty Teradata tables. MultiLoad: Provides parallel loading for high-volume batch files using commands. TPump (Teradata Parallel Data Pump): Loads data one row at a time using row hash locks. Load utility: Invokes FastLoad, MultiLoad, or TPump with Data Services.
What is the advantage of multiload? ›Intrauterine devices like multiload can also be placed within 20 hours of unprotected sexual intercourse if you want to prevent yourself from getting pregnant. These pills help to kill the sperms that would fertilize your egg and result in pregnancy.
Does multiload allow duplicates? ›
You don't have to handle duplicate records when doing fast load on multiset table. FLOAD will reject all the record level duplicate as said by Vivekanand. Whereas MLOAD will allow to insert duplicate on multiset table.
What are the uses of multiload? ›Multiload is a known IUD or intra uterine device which usually helps in contraception. This device is normally placed in the uterus where it slowly releases the hormone in order to prevent pregnancy for five years. This is normally given to a woman who has at least one child.
What are the limitations of FastLoad and MultiLoad? ›Multiload can load at max 5 tbls at a time and can also update and delete the data. Fastload can be used only for inserting data, not updating and deleting. Multiload can at max 5 tables with non unique secondary indexes on them. where as in fastload u cannot have secondary indexes on the table.
Which is better FastLoad or MultiLoad or TPump? ›FastLoad: Quickly loads large volumes of data to empty Teradata tables. MultiLoad: Provides parallel loading for high-volume batch files using commands. TPump (Teradata Parallel Data Pump): Loads data one row at a time using row hash locks. Load utility: Invokes FastLoad, MultiLoad, or TPump with Data Services.
Which modes are available for MultiLoad in Teradata? ›- MultiLoad Import. Each MultiLoad import task can perform multiple INSERT, UPDATE, DELETE, and UPSERT operation on five target tables in parallel. ...
- MultiLoad DELETE. ADVERTISEMENT.
- Select the Hadoop Connection Profile.
- Select the database containing the table you want to load.
- Select the table you want to load then click Next.
- Select the Destination Column Name/Type for each Source column name/type.
- Load the data of a file into table using load command. LOAD DATA [LOCAL] INPATH 'filepath' [OVERWRITE] INTO TABLE tablename.
- You can insert new data into table by using select query. INSERT INTO table tablename1 select columnlist FROM secondtable;
Yes! We can load multiple tables in a dataset. This is the main advantage of using a dataset.
What is the difference between FastLoad and BTEQ? ›(b) FastLoad Vs BTEQ Import: Same as above. BTEQ Import process 1 row at a time, meaning it import 1 row from the source file to the table. FastLoad uses the buffer's size (63 or 64 KB as indicated by the Buffer Size).
What is the difference between Tpump and multiload in Teradata? ›Tpump will need to write the data block once for each update. The advantage that Tpump has over Multiload is that it locks only the rows (actually row hashes) that it's updating whereas Multiload locks the entire table for write while it's updating the data.
Can we UPDATE multiple tables using UPDATE? ›
By default, the UPDATE statement updates one table at a time. However, you can use a JOIN clause in the UPDATE statement to update two tables in one statement. The JOIN clause allows you to specify a relationship between the two tables that you want to update, based on a common column or set of columns.
What are the limitations of FastLoad in Teradata? ›One of the limitations of fastload is that it does not check for duplicate rows in the input data or the target table. This means that if you run fastload multiple times on the same input file or table, you will end up with duplicate rows in the target table.
How do I select the first 100 rows in Teradata? ›TOP command: sel top 100 * from tablename; This will give the first 100 rows of the table. The TOP command will give you THE SAME results each time you run it.
How to improve performance of Teradata queries? ›- Avoid multiple Joins to the same table. ...
- Avoid Functions in Equi-Join Conditions. ...
- Avoid the Usage of UNION. ...
- Avoid GROUP BY over Expressions. ...
- Divide large SQL Queries into smaller ones. ...
- Consider the Creation of additional Statistics and Indexes.
FastLoad does not have the ability to skip header rows. FastLoad is always looking for records in an input file to adhere to the layout in the DEFINE statement.
How to restart FastLoad in Teradata? ›1 Remove the CREATE TABLE statement and any DROP TABLE and DELETE statements from the Teradata FastLoad job script to prevent the restarted job from dropping the partially loaded Teradata FastLoad table or deleting the entries in the two error tables. 2 Invoke Teradata FastLoad to start the job.
How to remove FastLoad lock in Teradata? ›how do we release the lock on table ,if table has been locked while loading data by using F-load? For fastload we can not release lock, we drop the table and recreate it again. Other way is to run a fastload which contain BEGIN LOADING and END LOADING statement.
What are the three types of loads? ›The loads in buildings and structures can be classified as vertical loads, horizontal loads and longitudinal loads.
What are the methods of data loading? ›There are two main types of data loading processes: a full load and an incremental load.
Which is high performance data loading utility? ›The High-Performance Loader (HPL) utility, which can load data from any ASCII or COBOL file that meets certain format prerequisites, uses parallel processing to perform fast data loading and unloading. However, the HPL requires significant preparation time.
What is the main component in multiload device? ›
Multiload is a type of intrauterine device. It consists of a small plastic rod wound with copper wire. It is provided with two flexible plastic arms. It releases copper ions and prevents the conception.
What is the lifespan of multiload? ›It remains effective for 10-15 years, while the Multiload Cu375 has a life span of only 3-5 years.
What is the difference between multiload and Copper T? ›Multiload lasts for up to 5 years and the Copper T (or TT380R) lasts for up to 10 years. The copper IUD works by: making it harder for sperm to reach and fertilise an egg. changing the lining of the uterus so that if an egg was fertilised, it still wouldn't be able to attach and develop.
What does multiload mean? ›Noun. multiload (plural multiloads) (computing, dated) A computer program that loads its code and data in a number of separate stages, typically to work around memory constraints.
What are the side effects of multiload device? ›Soon after Multiload has been fitted, you may have lower abdominal pain or cramps, but these usually get better quickly. If you have serious or persistent abdominal complaints or heavy bleeding you must tell your doctor. Your heart rate and/or blood pressure may change during, or after insertion or removal of an IUD.
What are the charges for multiload? ›| Offer Price | ₹489.60 |
|---|---|
| You Save | ₹86.40 (15% on MRP) |
| Contains | Surgical(0.0 Mg) |
| Therapy | NOT APPLICABLE |
Multiload 375 - It is an intrauterine device that is a few millimeters in size and is inserted into the uterus of the women to stop the occurrence of pregnancy.
What is multiload 375 function? ›Multiload 375, releases copper, which suppresses sperm motility and thus reduces its fertility capacity.
What does multiload 375 device contain? ›Multiload 375 - It has 375 mm2 of copper wire wound around its stem. The flexible arms are designed to minimize expulsions. The multiload 375 and T cu-380 A are similar in their efficacy and performance. Nova T - It is similar to the CuT-200, containing 200 mm2 of copper.
What is the error limit in Fastload? ›Syntax. Maximum number of records that can be rejected before executing the END LOADING command. The default error limit value is 1000000.
Why Fastload does not support NUSI? ›
A table consists of subtables and ML loads tables and not subtables. As ML supports populated tables there was a need to allow at least NUSIs (which are easy to maintain as they're AMP-local). Just USIs can't be loaded as they're not AMP-local and the overhead inter-AMP communication was probably too large.
Does multiload have data retrieval capability? ›No data retrieval capability. The Multiload supports five target tables per script. Tables may contain pre-existing data. Ability to do INSERTs UPDATEs, DELETEs and UPSERTs.
What is bulk load in Teradata? ›The Teradata Bulk Connection is used for reading and writing large volumes of data at a high speed to an empty table on a Teradata Database via the Input Data Tool and Output Tool. Besides being empty, the target table cannot have defined any secondary indexes.
How can a MultiLoad job be aborted in network attached clients? ›In network-attached environment, if you want to terminate the MultiLoad, please execute LOGOFF/QUIT command and press CTRL+C.
What is load isolation in Teradata? ›Teradata Load isolation was introduced with Teradata 15.10 and allowed us to use committed rows while another transaction changes them simultaneously. Load isolation adds data integrity to the functionality the LOCKING FOR ACCESS modifier already provides.
How many tables are there in Teradata? ›We can materialize up to 2000 global temporary tables per session. Following is the syntax of the Global Temporary table.
How many tables does a database have? ›The number of tables in a database is limited only by the number of objects allowed in a database (2,147,483,647). A standard user-defined table can have up to 1,024 columns. The number of rows in the table is limited only by the storage capacity of the server.
How many types of tables are there in Teradata? ›Teradata classifies the tables as SET or MULTISET tables based on how the duplicate records are handled. A table defined as SET table doesn't store the duplicate records, whereas the MULTISET table can store duplicate records.
How do I list all tables in a database in Teradata? ›To list the tables or views of any database. Select Tools > List Tables. Note: Wildcard characters only function when using an ODBC connection.
How to find row count of all tables in a database in Teradata? ›TablesV view; you likely will want to qualify by "schema" which is referred to as DatabaseName in Teradata. The actual number of rows is not directly available without SELECT COUNT(*) from each table. You can potentially retrieve a RowCount as of the last statistics collection from dbc. StatsV where StatsID=0 .
How to calculate the size of a table in Teradata? ›
- SELECT DATABASENAME, TABLENAME, CAST(SUM(CURRENTPERM) /1024/1024/1024 as DECIMAL (6,0)) as MaxPerm_GB.
- FROM DBC.TABLESIZE.
- WHERE DATABASENAME = '<database>' AND TABLENAME = '<table>'
- GROUP BY DATABASENAME , TABLENAME;
- SELECT table_name FROM INFORMATION_SCHEMA. TABLES WHERE table_type = 'BASE TABLE' SELECT name FROM sys. ...
- -- This returns all the tables in the database system. ...
- -- Lists all the tables in all databases SELECT table_name FROM information_schema.
The following query will show all tables in a MySQL database: SHOW TABLES; To see all the tables, you can run this statement from MySQL Command Line Client, MySQL Shell, as well as from any GUI tool that supports SQL—for example, dbForge Studio for MySQL.
What is the maximum number of tables in a database? ›there are no maximums as far as numbers of tables go.
What are the two types of data tables? ›A data table contains columns and rows of information used to achieve easier visual representation. There are two types of tables within a data model: the lookup table and fact table.
What are the four types of table? ›Dining Table. A dining table, as the name suggests, is a square, rectangular, oval, or round table whose primary function is dining.
What are the five basic types of table? ›- Basic Table Setting.
- Informal Table Setting.
- Formal Table Setting.
- Five-Course Table Setting.
- Buffet Table Setting.
(b) FastLoad Vs BTEQ Import: Same as above. BTEQ Import process 1 row at a time, meaning it import 1 row from the source file to the table. FastLoad uses the buffer's size (63 or 64 KB as indicated by the Buffer Size).
Why the multi load support nusi rather than usi in teradata? ›Teradata MultiLoad Limitations
In MultiLoad, each AMP works in parallel and independently. That's why it supports NUSI but not USI. No Referential Integrity: Referential Integrity (RI) on the target table not supported by the Teradata MultiLoad.