Headlines of this issue

Check your eyes? The road to the cloud requires meeting the right person!

890_421

With the rapid popularization of cloud computing concepts, "going to the cloud is the norm, not going to the cloud is the exception" has become a consensus. More and more enterprises are eager to share the technical dividends brought by the development of cloud computing with elasticity, flexibility, security and low cost. After "Going to the cloud, going to Alibaba Cloud" solved the problem of what cloud to go to, how to go to the cloud has become a headache for enterprise technicians. How to design the application infrastructure on the business system cloud, how to smoothly migrate the system storage and database, etc. have become obstacles for enterprises to go to the cloud. In order to solve the pain points of enterprises before migrating to the cloud, Alibaba Cloud's support and service team has launched five expert service products for consulting and design scenarios. see more

Consulting FAQ

Q: Why did the first trial of the filing fail? How should it be handled?

A: You can check the reason for the failure in the recordation console, make corresponding adjustments and resubmit. For common causes and solutions, please click to view .

Q: How to do the filing and what is the filing process?

A: After you have purchased a server in the mainland region on Alibaba Cloud, you can record the domain name. The main process is divided into: the initial review of the record, the photo verification, and the management bureau review. For details, please click to view .

Q: How to query the filing information?

A: You can check your filing information by logging in to the filing console. If you have forgotten your filing account, you can click to retrieve it.

Q: How to resolve domain names?

A: Log in to the account where your domain name is located, enter the console, and add resolution in [Domain Name].

Q: What should I do because my registration fails the domain name verification?

A: If you encounter this problem, you need to transfer the domain name, and the new domain name owner should be the same as the filing subject. Domain name transfer can be completed in the console, click to view the details .

Technical FAQ

RDS for SQLSever出现 Logon failed for login 'superqy' due to trigger execution

Solution suggestion: Generally, the connection number is full. Please check the connection number monitoring information of RDS.

DTS data subscription appears Found no feasible stores for name [aliyun_bj_ecs_xxxxxxxxxxxxx-1-0]

Solution suggestion: Check whether the consumption site of the console is within the correct data range, if not, restart the client after adjusting the correct site.

OSS-SignatureDoesNotMatch error occurs when accessing

Solution suggestion:

Confirm whether to generate the signature through the API or generate the request through the SDK;
If the signature is generated for the SDK, it is often caused by the abnormal filling of the OSSClient initialization parameters. It is especially necessary to note that the endpoint parameter does not include the bucket name;
If you generate it yourself for the API, please refer to the generation algorithm of the string to be signed in the signature document, and confirm that the newline character is added correctly;
When there are special characters such as "+" in the URL, the browser may not recognize it. You need to urlencode the signature, and you need to url encode the "+", etc., and convert the + to "%2b" before the browser can recognize it;
Please refer to the signature verification tool to simulate and verify the implementation of the signature algorithm;

Reference documentation:

Include signature in Header
Install Python-SDK
visualized signature page Add URL signature example and image processing URL signature example

Method for migrating data between OSS and Bucket

Solution suggestion:

If two buckets belong to the same account and belong to different regions, the cross-region replication function can be used;
If the data is copied from OSS in the same region, it is recommended to use the listObject and copyObject methods for migration. ListObject obtains the names of all files in the folder, and then migrates the data through copyObject;
If the above conditions are not met, you can consider using the oss-import migration tool. This tool has no restrictions. It only requires that the server deployed by the tool can be connected to the two bucket networks;

Reference documentation:

ossimport description and configuration

Solutions for CDN-499 errors

Solution: The 499 error is the custom error code of nginx, which is the error code thrown by CDN. The scene of this error is that after the client establishes a connection with the server, during the server processing, the client unilaterally disconnects. This connection, so this 499 will be recorded in the log. The common case of this error is that the CDN misses and then needs to pull back to the source for the pull request, and the client actively disconnects during the pull request process.

Check whether the response speed of the resource at the source site is normal at the corresponding time point;
Set the cache time of the resource to be longer to avoid frequent back-to-source situations;

ECS--io full

Solution suggestion: