How do I know how many AMPs I have in Teradata?
Query to find the total number of AMPs in Teradata AMPs numbering is starts from zero(0) in Teradata. Since the HASHAMP function will give the maximum AMP number, we have added 1 to find the total number of AMPs.
What is hot AMP in Teradata?
When the workload is not distributed across all the AMPs, only a few AMPs end up overburdened with the work. This is a hot AMP condition. This typically occurs when the volume of data you are dealing with is high and. (a).
What are Teradata AMPs?
Access Module Processor (AMP) − AMPs, called as Virtual Processors (vprocs) are the one that actually stores and retrieves the data. AMPs receive the data and execution plan from Parsing Engine, performs any data type conversion, aggregation, filter, sorting and stores the data in the disks associated with them.
How many AMPs is a Teradata node?
The number of AMPs per node is determined by the available CPU and IO. Usually it’s approx. 1 AMP per logical CPU and each AMP has assigned 2*2 mirrored (RAID1) disks (plus eventually a 1/4 of a SSD).
What is node in Teradata?
Each individual server in a Teradata system is referred as a Node. A node consists of its own operating system, CPU, memory, own copy of Teradata RDBMS software and disk space. A cabinet consists of one or more Nodes.
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.
What is USI in Teradata?
Unique Secondary Index (USI) As the name suggest, USI enforces uniqueness on a column or group of column values. Teradata will create subtable on each amp once you create the USI on a column or group of columns. The subtable will contain below three information:- The secondary index value.