Teradata
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The document summarizes the architecture of a Teradata database system. It consists of nodes that each contain a parsing engine, BYNET messaging layer, and access module processors (AMPs). The parsing engine receives queries, prepares execution plans, and returns results. BYNET passes data between the parsing engine and AMPs. AMPs store and retrieve data from disks and perform query operations like filtering and aggregation. Records are distributed evenly among AMPs.
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Teradata
- 1. TERADATA DBA
- 2. Teradata architecture is based on Massively Parallel Processing (MPP) architecture.The major components ofTeradata are Parsing Engine, BYNET andAccess Module Processors (AMPs).The following diagram shows the high level architecture of a Teradata Node.
- 4. Node Parsing Engine Message Passing Layer Access Module Processor (AMP)
- 5. It is the basic unit inTeradata System. Each individual server in aTeradata system is referred as a Node. A node consists of its own operating system, CPU, memory, own copy ofTeradata RDBMS software and disk space. A cabinet consists of one or more Nodes.
- 6. Receive the SQL query from the client Parse the SQL query check for syntax errors Check if the user has required privilege against the objects used in the SQL query Check if the objects used in the SQL actually exists Prepare the execution plan to execute the SQL query and pass it to BYNET Receives the results from the AMPs and send to the client
- 7. Message Passing Layer called as BYNET, is the networking layer inTeradata system. It allows the communication between PE and AMP and also between the nodes. It receives the execution plan from Parsing Engine and sends to AMP. Similarly, it receives the results from the AMPs and sends to Parsing Engine.
- 8. AMPs, called asVirtual 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. Records from the tables are evenly distributed among the AMPs in the system. Each AMP is associated with a set of disks on which data is stored. Only that AMP can read/write data from the disks.
- 9. When the client runs queries to insert records, Parsing engine sends the records to BYNET. BYNET retrieves the records and sends the row to the targetAMP. AMP stores these records on its disks. Following diagram shows the storage architecture ofTeradata
- 11. Oracle training in marathahalli http://www.traininginmarathahalli.in