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An update of a very large table was in progress when the system experienced an unplanned restart. After restarting, the system is available, but Recovery Manager shows it may be many hours before a large table is available for use. The Administrator needs to make the table available sooner.
Which option should be used to achieve this goal?
When a system experiences an unplanned restart during an update operation, the rollback process can take a significant amount of time, especially for very large tables. Canceling the rollback will stop the system from attempting to undo the incomplete transactions.
After canceling the rollback, the table can be restored from a backup, which is a much faster way to recover the table and make it available for use again.
The other options are less effective:
Use Workload Manager to elevate the rollback to the SLG tier: While this may prioritize the rollback, it doesn't significantly reduce the time required for a large table rollback.
Use MultiLoad to execute a DROP of the table, and restore it from backup: MultiLoad is not typically used for dropping tables, and this adds unnecessary complexity.
Drop the transaction journal, and set RollbackPriority to TRUE: Dropping the transaction journal could lead to data inconsistencies, and setting RollbackPriority to TRUE does not directly make the table available sooner.
A Vantage instance includes the following four databases:
Tables Database contains base tables and associated index subtables
Upsert_Database: contains views and other objects to support base table modifications
Query Database: contains views and other objects supporting queries and reporting
Development_Database: contains objects supporting development of new data applications
The Administrator needs to add a new user that will perform batch-level functions.
Which action should the Administrator take to achieve this goal?
Batch-level functions often involve creating and modifying tables as part of large data loads or updates. To allow the new user to perform these functions, the Administrator should assign them a profile that grants appropriate permissions, such as the CREATE TABLE privilege on the Tables_Database, where base tables are stored.
Profiles are a common way to manage and control resource and security settings for users in Teradata, and assigning a profile with the CREATE TABLE privilege ensures that the user can create tables in the specified database without granting excessive privileges.
Option A (Grant the CHECKPOINT privilege on the Tables_Database): The CHECKPOINT privilege is related to checkpointing transactions, which is not directly relevant to batch-level functions involving table creation or modification.
Option B (Set the user's default role to one that has the CREATE TABLE privilege): While setting a default role can grant privileges, using a profile is a more scalable way to manage user resource and privilege settings, especially if the profile already exists with the necessary permissions.
Option D (Grant the CHECKPOINT privilege on the Tables_Database to the new user's profile): Again, the CHECKPOINT privilege is not directly related to the batch-level activities such as creating tables.
How can an Administrator monitor the data volume that is transferred for a Data Mover job via Viewpoint?
The Data Mover portlet in Viewpoint provides specific functionality for managing and monitoring Data Mover jobs. By accessing the log tab within the Data Mover portlet, the Administrator can review detailed logs, including the data volume that was transferred during the job execution.
Option A (Completed Queries portlet) focuses on monitoring and analyzing completed queries but does not provide detailed insights into Data Mover jobs.
Option C (Performance Data Collection portlet) is used for monitoring system performance but is not directly related to Data Mover job details or data transfer volumes.
Option D (datamove status command) is a CLI (Command-Line Interface) method to check job status, but it is not related to monitoring the data volume within the Viewpoint environment.
A suite of development jobs have been mistakenly executed at a time when a long-running critical job is being run. The business has decided to allow the development jobs to run if they do not block the critical job. An Administrator has been tasked with recording any delays experienced throughout the execution of this critical job and to abort any of the development jobs if they block it.
Which Viewpoint portlet could the Administrator use for this purpose?
The Lock Display portlet in Teradata Viewpoint provides detailed information about database locks. It allows the Administrator to monitor if any queries or jobs are causing lock contention that could block the critical job. Using this portlet, the Administrator can see if the development jobs are creating locks that delay or block the critical job. If such blocking is detected, the Administrator can take action, such as aborting the development jobs.
Option A (Query Session) shows information about active sessions but is not focused on lock contention and blocking.
Option B (Query Monitor) allows the monitoring of query performance and workloads but doesn't specifically focus on lock contention.
Option C (Show Locks) can display current lock information, but Lock Display provides a more comprehensive tool for monitoring and managing lock-related issues.
An Administrator needs to perform a cleanup task on the LOAD_ISOLATED table Employee_Address, which has grown in size.
Which lock is placed on the table when the Administrator performs clean up of the logically deleted rows?
When performing cleanup tasks such as deleting logically deleted rows, the WRITE lock is typically applied. This lock ensures that the Administrator can modify the data in the table (such as removing logically deleted rows) while preventing other users from accessing the table for write operations. However, it allows other users to read from the table.
Other lock types:
ROW ACCESS allows reading specific rows without blocking other access, which is not suitable for cleanup tasks.
EXCLUSIVE locks the entire table for both reading and writing, which is generally too restrictive for this kind of operation.
READ only allows read access and does not permit any modifications, which would prevent the cleanup task from being performed.
