what is amp plz explanation
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Answer / tdguy
Access Module Processor stores and retrieves the
distributed data in parallel. Ideally, the data rows of
each table are distributed evenly across all the AMPs.
Their job is to receive the optimized plan steps, built by
the PE after it completes the optimization, and execute
them.
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Answer / rahul
Amp is a virtual process, it performs dml,ddl operations
and also responsible for applying and releasing locks.
amp having some space to perform operations,like storing the
data.
this space can not be shares any other amp in the node.
dats y we call Teradata architecture is shared nothing.
amps are associated with disk,which will invokes controllers
of the disk after completion of its task.
Thanks
Rahul
| Is This Answer Correct ? | 3 Yes | 0 No |
Answer / yuvaevergreen
AMPS are the components which operate in parallel. PE
dispatches the plan to AMP thru BYNET. Each amp is connected
to vdisk. AMPs also perform functions like sorting of rows.
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / vinoth
Adding to the above points,
Rows will be distributed evenly among the AMP's if you specify the Primary Index for a table.
If you able to use the One AMP operation then you will be able to retrieve faster results. If you use all the AMP then it's called as Full table scan and the query results are very slow here.
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Teradata 
