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Categories >> Software >> Data Warehouse >> Teradata
 
 


 

 
 Teradata interview questions  Teradata Interview Questions (183)
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Question
What is the process to restart the multiload if it fails?
 Question Submitted By :: Teradata
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
If Mload failed in the Acquisition phase just rerun the
job.If Mload failed in Application Phase:
a) Try to drop error tables, work tables, log tables,
release Mload if required n submit the job
from .Begin Import onwards.
b) if ur table is fallback protected u need to make sure un
fallback and use RELEASE MLOAD IN APPLY sql.
Then resubmit the job.

Guru,
Advanced Teradata Certified Professional
 
Is This Answer Correct ?    32 Yes 4 No
Guru
 
Answer
# 2
Modification to Answer#3 placed above.
Mload fails in application phase: Then e can not access the
table.

1. The solution is we need to restart the mload job or drop
the original table and worktable and logtable and error
tables.

2. If we remove worktables, errortables and logtables then
we can restart the mload job. If we try to restart then it
gives the error messages saying worktable is missing for
the table. Even release mload also doesn't work.

2. If we don't remove: Then if we restart mload job, then
it will be fine and start from the checkpoint, of the last
block that have updated to disk.
 
Is This Answer Correct ?    10 Yes 3 No
Kumar
 
 
 
Answer
# 3
slight modification in answer 5:
if Mload got failed in Application phase then either you can
restart it by simply resubmitting the job again and it will
be fine and start from the checkpoint, of the last
block that have updated to disk but if you don't want to
restart it then you need to drop the two error tables one
work table one log table and release mload from the target
table.
 
Is This Answer Correct ?    8 Yes 3 No
Jaya
 
Answer
# 4
-->Logtable should be retained in case of a restart.
-->In case of a Teradata failure, TD will automatically
restart multiload once TD is up or just resubmitting will
restart from the checkpoint.
-->In case of a mainframe or any other network failure,
just resubmitting will make the job easier. TD will
automatically restart from the halted point.
 
Is This Answer Correct ?    4 Yes 0 No
Tdguy
 
Answer
# 5
The above ans is only when the MLOAD failed in acquisation phase

To release lock in application phase failure in MLOAD

RELEASE MLOAD <Table Name> .IN APPLY;

----
Hi Friends Got a Best ANS share with us :)
 
Is This Answer Correct ?    11 Yes 9 No
Sat!sh
 
Answer
# 6
Log Table: MultiLoad requires a LOGTABLE. This table keeps
a record of the results from each phase of the load so
that MultiLoad knows the proper point from which to
RESTART. There is one LOGTABLE for each run. Since
MultiLoad will not resubmit a command that has been run
previously, it will use the LOGTABLE to determine the last
successfully completed step.
 
Is This Answer Correct ?    2 Yes 5 No
Lilian
 
Answer
# 7
MULTILOAD will creates 2 error tables, 1 work table

When MULTILOAD fails We have to unlock the Main Table, here
error tables and work tables are not locked like FLOAD

To Unlock the Main Table in Mload

RELEASE MLOAD <TABLE NAME>;

----
Hi Friends Got a Best ANS share with us :)

 
Is This Answer Correct ?    8 Yes 13 No
Sat!sh
 

 
 
 
Other Teradata Interview Questions
 
  Question Asked @ Answers
 
Why FLOAD doesn't supports NUSI? Where as Mload supports NUSI. Please explain in this regard. Thanks in advance. Teradata 4
IS IT POSSIBLE THAT THERE R TWO PRIMARY KEY WILL BE IN A SAME TABLE?PLZ HELP ME BY GIVING THE ANSWER.THANK U.   10
what is the advantages of other etl tool than teradata utilities or vice versa ?(datastage/informatica)   4
I have a table with emp id, emp name, dept id and sal where dept id is NUSI. SEL * FROM EMP WHERE DEPTID = 100. Can any one explain how it will fetch the record.   2
what is the difference between start schma and Fsldm? Intel 5
Is PK concept available in Teradata. If it is how can we create Primary Key for a table in TD Wipro 5
What is the Maximum number of volatile tables that can be created? Mphasis 4
How do you check the performance of Teradata Query and list down the basic Performance Tuning steps you use? IBM 2
where we can use the delimiter in mload? pls let me know Wipro 2
Write a single SQL to delete duplicate records from the a single table based on a column value. I need only Unique records at the end of the Query.   13
On which column will you take primary index???   4
Increasing no of amps will increase performance. Is this true? Infosys 5
 
For more Teradata Interview Questions Click Here 
 
 
 
 
 


   
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