TDVAN5 Vantage Administration Exam Questions and Answers

Filters in Teradata workload management allow the Administrator to define rules that restrict or block certain types of queries or connections based on specific criteria, such as the username, query client, or other attributes. In this case, the Administrator can use a filter to prevent queries from specific clients using the application's username, enforcing the security policy.

Option A (Flex Throttle) is used to manage query concurrency and system resources dynamically but is not designed to enforce security policies like user restrictions.

Option B (Utility Session) controls the number of utility sessions but does not help with filtering query clients based on usernames.

Option C (Exception) handles query workload exceptions based on certain thresholds or behaviors but doesn't directly enforce user or client restrictions.

Teradata Active System Management (TASM) allows the system administrator to control and manage query workload in real-time. A TASM system filter can be used to prevent or deprioritize certain types of queries, such as product joins or poorly written queries, that are consuming excessive resources. This approach ensures that problematic queries do not harm the overall system performance.

Query Spotlight Viewpoint portlet focuses on identifying and managing individual queries but does not provide the same level of proactive filtering and control as TASM system filters.

Flex Throttle is useful for controlling the concurrency of queries, but it doesn't specifically address preventing or managing product joins in a way that would directly resolve the issue with poorly written SQL.

Query Log Viewpoint portlet would help in identifying and aborting harmful queries, but it's a reactive approach rather than a proactive solution like using TASM system filters.

User-Defined Event is the appropriate event type in TASM (Teradata Active System Management) for dynamically triggering actions based on custom triggers, such as the completion of an event-driven batch window. This event type allows the administrator to define specific conditions or API calls to trigger changes in the system, such as switching to a reporting planned environment.

The other options:

API Event is not a defined event type in TASM.

System Event is used for events triggered by system-level occurrences, such as system state changes or alerts, but not for custom triggers like batch window completion.

Period Event is based on predefined, fixed time intervals, which wouldn't work for the variable timing of the batch window in this scenario.

Merge step issues often occur when a large amount of data is being processed during the table creation, especially if the system is trying to simultaneously create the table and insert data.

By using "WITH NO DATA", the table structure is created first, without the actual data being inserted during the table creation process. The *"INSERT ... SELECT " command can then be used afterwards topopulate the table in a more controlled way, reducing the load on the system during the creation phase and potentially improving the efficiency of the merge step.

Specifying a good distribution for the primary index can help overall performance, but it doesn't directly address the issue with the merge step in this scenario.

Specifying the MERGEBLOCKRATIO isn't typically a solution for this specific problem; the merge block ratio is more about the optimization of data block merges rather than the creation of tables.

Moving the creation to off-peak hours may help if the environment is busy, but it doesn't directly address the core issue of the merge step getting stuck.

WIO (Work in I/O) is at 25%, which indicates that the system is spending a significant amount of time waiting for I/O operations to complete. This suggests that I/O is the most constrained resource in this scenario. A high WIO typically points to I/O bottlenecks, causing delays in processes like data loading.

The other resources appear to be less constrained:

CPU: The system is busy with 75% CPU usage, which indicates the CPU has available capacity (not fully utilized).

BYNET: With 10% BYNET usage, there is no indication of network congestion.

Parallelism: Inter-AMP parallelism is at 90%, which suggests that parallel processing is functioning well and not the bottleneck.

Thus, the data load slowdown is likely due to I/O constraints, making I/O the most constrained resource in this case.