Alibaba Cloud OSS is a cloud storage service that features massive capacity, outstanding security, low cost, and high reliability. No traffic charges are applied when files are uploaded to OSS via the management console or using Open API.
Alibaba Cloud OSS does not charge for data ingress, meaning there are no traffic charges for uploading files to OSS, whether through the management console or Open API. However, traffic charges may apply for data egress, i.e., downloading files from OSS.
The maximum number of connections for an RDS instance depends on ____________.
The maximum number of connections to an RDS instance primarily depends on the memory size of the instance. Higher memory capacity allows for more simultaneous connections, as memory is a key resource in managing and maintaining connections. Alibaba Cloud RDS scales the connection limit based on the instance's memory allocation to ensure stable database performance.
Alibaba Cloud OSS is a cloud storage service that features massive capacity, outstanding security, low cost, and high reliability. To control access to files stored on OSS, OSS provides multiple access permissions for each bucket. These bucket permissions are _______________. (Choose three.)
Alibaba Cloud OSS provides three primary access permissions for buckets: Private, Public-read, and Public-read-write.
Private: Only the owner has access to read or write data.
Public-read: The owner can read and write, but others can only read.
Public-read-write: The bucket is fully open for reading and writing by all users.
There is no Private-read permission in OSS access control options, so option A is incorrect.
RDS instances are automatically created in master-slave mode without extra charge or configuration.
Alibaba Cloud RDS automatically deploys instances in master-slave mode (high availability) without additional configuration or charges. This ensures data redundancy and disaster recovery by maintaining synchronous data replication from the master to the slave instance.
You have set an alert policy for the disk usage of an ECS instance by using Alibaba Cloud CloudMonitor. Each measurement cycle lasts for 5 minutes, during which the average disk usage is measured. If the average disk usage exceeds 80% for five consecutive measurement cycles, an alert will be reported. After your average disk usage exceeds 80%, how long will it take to receive an alert?
With a measurement cycle of 5 minutes and a requirement for five consecutive cycles where disk usage exceeds 80%, it would take 55=255 \times 5 = 2555=25 minutes for CloudMonitor to confirm the condition. After confirmation, CloudMonitor typically processes and sends the alert, which may take an additional 5 minutes, totaling approximately 30 minutes before you receive the alert.
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