How does FastLoad work in Teradata?
How does FastLoad work in Teradata?
Teradata FastLoad utility establishes multiple session i.e., one session per AMP by default, does not use any transient journal during operation, and transfer data using block rather than row to load data into the table. That’s why it is so fast. It loads only one table at a time.
How do you run a FastLoad script?
Executing a FastLoad Script fl, you can run the FastLoad script using the following command in UNIX and Windows. FastLoad < EmployeeLoad. fl; Once the above command is executed, the FastLoad script will run and produce the log.
What is FastLoad and MultiLoad in Teradata?
FastLoad can sort the incoming rows directly into the target table, whereas MultiLoad first sorts the incoming rows into a worktable and then applies the worktable to the target table. MultiLoad fully supports mulltiset tables with duplicate rows.
What is UV table in Teradata?
The first (ET) error table is primarily for errors detected during the Acquisition phase. The second (UV) error table is for most errors detected during the Application phase. In general, this would include Uniqueness or other Constraint violations, or overflow on anything other than PI fields.
Does Fastload allow duplicates?
The Reason behind Fastload not allowing Duplicate rows is the Restart Logic. So when its restarted simply doesn’t know, if a row was duplicate within the data or was sent twice because of a restarted FastLoad (in Application Phase).
How does TPT work in Teradata?
Teradata Parallel Transporter aka TPT is new generation utility tool aim to create one stop tool for all the activities related to loading and exporting of date from/to Teradata database. Teradata advise to prefer TPT over existing utilities such as fastload, fastexport, multiload & tpump.
How many phases are in Fastload in Teradata?
two phases
Fastload has two phases: acquisition phase and application phase. mload has 5 phases(Note: however there is no acquisition phase for mload delete). mload phases: Preliminary,DML Transaction,Acquisition,Application,Cleanup. The name itself is fast load.
How do I restart Fastload?
Fast load has two phases – PHase1(acquisition phase) and Phase 2(application phase). 1) If the job fails in 1st phase and you want to continue the job after fixing the issue then you need to resubmit the job and it will start from last check point.
How do I restart FastLoad?
Why is Fastload not loading duplicates?
The Reason behind Fastload not allowing Duplicate rows is the Restart Logic. So when its restarted simply doesn’t know, if a row was duplicate within the data or was sent twice because of a restarted FastLoad (in Application Phase). …
What is MLoad in Teradata?
Teradata MultiLoad or MLoad is a command-driven load utility for fast, high volume data maintenance on multiple tables or views in Teradata large databases. Each MultiLoad import task can do multiple data insert, update, and delete functions on up to five different tables or views.
