To copy a directory and its contents from a local workstation to a Compute Engine virtual machine instance, you should use the gcloud compute scp command with the --recurse flag. This command securely copies files and directories between your local machine and virtual machine instances. The correct command is: gcloud compute scp --project "my-gcp-project" --recurse ~/local-scripts/ gcp-instance-name:~/server-scripts/ --zone "us-east1-b". Options A and B use the gsutil cp command, which is intended for copying data to or from Google Cloud Storage rather than directly between local systems and Compute Engine instances. Option D uses gcloud compute mv, which is intended for moving rather than copying files or directories.
To be alerted if the Unix process has not run for at least 5 minutes without changing the application to generate metrics or logs, the best approach is to use a metric absence condition. This type of condition allows monitoring the absence of specific data points over a time interval, in this case, 5 minutes. When the process stops running, it will stop reporting its metrics, and this absence will trigger the alert. This approach ensures you are notified if the process has not been active for the specified duration.
The UNION operator in SQL is used to combine the result sets of two or more SELECT statements, while automatically removing duplicate rows from the result set. This makes it suitable for the scenario where you need to quickly combine two tables with identical columns and eliminate duplicates.
To minimize the impact and number of users affected by issues in a new version of an application, the best strategy is Canary deployment. This strategy involves rolling out the new version to a small subset of users first, allowing you to monitor and address any issues before a full-scale deployment. This gradual release ensures that only a limited number of users are impacted at any time, making it easier to handle any potential problems and roll back if necessary.
To ensure 99.999% availability of the database and minimize read latency for users across the globe, the company should create a multi-regional Cloud Spanner instance with the 'nam-asia-eur1' configuration. This setup provides data replication across North America, Asia, and Europe, ensuring high availability and low latency for a global user base. Additionally, creating a cluster with at least three Spanner nodes will enhance computational capabilities and further minimize read latency by distributing the load and providing fault tolerance.