No. The upload and download speed depends on your local bandwidth.
A bucket domain name in the format of
<BucketName-APPID>.cos.<Region>.myqcloud.com is an XML domain name. As long as the file type can be directly previewed in your browser, you can preview the file in your browser by accessing the object link in this domain name format.
A bucket domain name in the format of
<BucketName-APPID>.<region>.myqcloud.com is a JSON domain name. If you access the object link in this domain name format in your browser, a download window will pop up, and there are two ways to preview the file in the browser:
Take the picture.jpg file in the root directory of the bucket examplebucket-1250000000 in Beijing for example:
https://examplebucket-1250000000.cos.ap-beijing.myqcloud.com/picture.jpg, you can directly access the address to preview the picture.jpg file in your browser.
https://examplebucket-1250000000.cosbj.myqcloud.com/picture.jpg, there are two ways to directly preview the object in your browser:
You can also let your browser pop up a window for the file to be downloaded by setting the value of the request parameter
response-content-disposition in the GET Object API to "attachment". For more information, see GET Object.
To use the
response-*parameter in a request, the request must be signed.
The access domain names of COS adopt intelligent DNS resolution. For COS access via Internet (including different ISPs), we will detect and select the optimal linkage for you to access COS. If you have deployed a service in Tencent Cloud to access COS, the access in the same region will be automatically directed to the private network address. The cross-region access is not supported in the private network and the COS domain name is resolved to the public network address by default.
Tencent Cloud products within the same region access each other over a private network by default and no traffic fee is charged for these connections. For this reason, it is recommended to choose the same region when you purchase different Tencent Cloud products for cost saving.
The following shows how to determine whether it is an access via private network:
For example, when a CVM access COS, to determine whether a private network is used to access COS, use the
nslookup command on the CVM to resolve the COS domain name. If a private network IP is returned, the access between CVM and COS is over a private network; otherwise, it is over a public network.
Generally, a private IP address takes the form of
100.*.*.*, and a VPC IP address takes the form of
examplebucket-1250000000.cos.ap-guangzhou.myqcloud.com is the address of destination bucket, and the
Address: 10.148.214.13 below it indicates the access is over the private network.
nslookup examplebucket-1250000000.cos.ap-guangzhou.myqcloud.com Server: 10.138.224.65 Address: 10.138.224.65 #53 Name: examplebucket-1250000000.cos.ap-guangzhou.myqcloud.com Address: 10.148.214.13 Name: examplebucket-1250000000.cos.ap-guangzhou.myqcloud.com Address: 10.148.214.14
For more information on private and public network access and connectivity testing, see COS Access via Private Network and Public Network.
For the private DNS server addresses of CVM, see Private Network DNS.
There are differences between the private IP address of CPM (common format:
9.*.*.*) and the IP address of CVM (common format:
10.*.*.*). If you have any questions, submit a ticket for assistance.
You can log in to the COSBrowser, select the folder to be downloaded, and click Download to download the folder or files in batches. You can also download the folder using the COSCMD tool. For more information, see COSCMD.
Troubleshoot the problems by following the steps below:
The versioning feature is now available in COS. If versioning is not enabled for the bucket, when you upload a new file to the bucket where another file with the same name already exists, the latter will be directly overwritten; if versioning is enabled, multiple versions of the object will co-exist.
1 MB. For more information, see Specifications and Limits.
This error may occur due to your unstable local network environment. You are recommended to upload again in a different network environment.
To do so, you can set your bucket permission to private read/write. For more information, see [Setting Access Permission] (https://intl.cloud.tencent.com/document/product/436/13315). You can also configure a hotlink protection whitelist on your bucket to block any access from domain names not in the list. For more information, see Setting Hotlink Protection.
COS allows each root account to have up to 1,000 bucket ACL rules, beyond which an error will be reported. Therefore, we recommend that you delete those you find useless.
We do not recommend that you use ACLs or policies at the object level. When you call an API or SDK, please leave empty the object ACL parameters (such as x-cos-acl, and ACL), and inherit the bucket permissions if you don't need any special ACL control over your files.