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Object Storage Service (OSS) supports access logging. A bucket owner can activate access logging for their buckets in the OSS management console. When access logging is activated for bucket A, OSS automatically accesses the request logs for this bucket (in hours) and generates and writes an object to the user-specified bucket B according to certain naming rules. Which of the following
statements is true for OSS logging?
OSS logging is a feature that allows you to record the access requests to your OSS buckets. You can enable and configure logging for a bucket in the OSS console or by using the OSS API. When logging is enabled for a bucket A, OSS automatically generates access log objects every hour and stores them in a specified bucket B. The log objects follow a predefined naming convention that includes the source bucket name, the date, the hour, and a unique string.
The documentation also states that buckets A and B can be separate buckets or the same bucket, but they must belong to the same user1. This means that you cannot store the access logs of one user's bucket in another user's bucket. Therefore, the correct answer is A.
1: Logging - Object Storage Service - Alibaba Cloud Documentation Center
Company A constructed a sales management platform using three Elastic Compute Service (ECS) instances. One of the instances runs MySQL, and is used as the database server. The other two instances are used as Web servers After some time, the number of employees in Company A dramatically increases, leading to higher sales volumes At the same time, the platform response speed is gradually decreasing too.
According to the report from CloudMonitor, the average CPU utilization rate of the two Web servers exceeds 70%, and database load
reaches 75% Company A can select Alibaba Cloud_________ services.to cope with the issue and optimize the performance. (Number of correct answers: 2)
Option B is correct because using Server Load Balancer (SLB) and adding additional ECS instances can help to distribute the traffic among multiple servers and improve the availability and scalability of the platform. SLB can also provide health checks and fault tolerance for the ECS instances1
Option D is correct because replacing the self-built MySQL database with ApsaraDB for RDS can provide better database performance, security, and reliability. ApsaraDB for RDS is a fully managed cloud database service that supports MySQL, SQL Server, PostgreSQL, and other engines. It can automatically handle tasks such as backup, recovery, monitoring, and patching. Using RDS read-only instances can also handle read-only requests and reduce the load on the primary database2
Option A is incorrect because importing database data into Object Storage Service (OSS) will not share the storage pressure on the platform. OSS is a cloud storage service that provides high durability, availability, and scalability for storing unstructured data such as images, videos, and documents. It is not suitable for storing structured data such as database tables. Moreover, importing data into OSS will incur additional costs and latency3
Option C is incorrect because using Content Delivery Network (CDN) will not enhance the content loading speed of the platform. CDN is a distributed network that delivers content to users based on their geographic locations, the origin of the content, and the content delivery server. It is mainly used to accelerate the delivery of static content such as images, videos, and scripts. It is not effective for dynamic content such as database queries and transactions4
1: Server Load Balancer - Alibaba Cloud
2: ApsaraDB for RDS - Alibaba Cloud
3: Object Storage Service - Alibaba Cloud
4: Content Delivery Network - Alibaba Cloud
If users use Alibaba Cloud Anti-DDoS Basic service, when the attack traffic exceeds the service upper limit, the black hole policy will then be triggered; after that, the users' servers can still provide services at a limited speed.
When the black hole policy is triggered by excessive DDoS traffic, the affected server is temporarily isolated from the network to prevent further damage. During this period, no services are available, meaning the server cannot provide limited-speed services.
When using Alibaba Cloud SLB to forward layer 7 (HTTP) service requests, SLB will replace the IP address in the HTTP header file to forward requests. Therefore, the access IP address that can be seen on the backend ECS instance is the IP address of SLB instead of the client's real IP address.
When forwarding layer 7 (HTTP) requests, Alibaba Cloud SLB preserves the client's real IP address by including it in the X-Forwarded-For header. This allows the backend ECS instance to access the client's actual IP rather than the SLB's IP address. This practice is common for maintaining accurate client IP information in HTTP forwarding scenarios.
You deployed a MySQL database on an Alibaba Cloud Elastic Compute Service (ECS) instance. Due to increased traffic, you want to improve performance by splitting read/write requests. Therefore, you can use Alibaba Cloud ___________ to solve this issue.
Alibaba Cloud ApsaraDB for RDS offers read/write splitting capabilities, allowing you to distribute read requests to read-only instances and write requests to the primary instance. This setup improves database performance under high traffic by optimizing read workloads, which is particularly useful for MySQL databases deployed in high-demand environments.
