Ali cloud -OSS-Help- Description: Frequently Asked Questions

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This article lists the frequently asked questions Ali cloud object storage OSS help you quickly understand the OSS.

General FAQs

What is Ali cloud OSS?
Ali cloud object storage service (Object Storage Service, referred to as OSS), Ali cloud mass is provided, secure, low-cost, highly reliable cloud storage service, and unlimited expansion. Design data persistence which is not less than 99.9999999999 percent (12 9), designed to service availability (or business continuity) is not less than 99.995%.
What OSS do?
OSS has a RESTful API interfaces and platform-independent, you can, any time, any place to store and access any type of data in any application. Since the OSS is highly scalable and you only pay for actual usage, so you can start with a smaller amount, and scale according to business needs, without compromising performance and reliability.

You can use the API provided by Ali cloud, SDK interface or OSS migration tool easily vast amounts of data into or out of Ali cloud OSS. Data stored in the cloud OSS Ali later, you can select the standard memory (Standard) as a mobile application, large sites, photo sharing or major audio and video storage hot spots, you can also choose a lower cost, longer-term storage of low-access memory ( infrequent access) and archival storage (archive) as a way to store infrequently accessed data.

More about OSS functions, refer to the function overview .
Who should use OSS?
OSS for communities to share multimedia station, the size of various forms of e-commerce webmasters, APP application software and application developers, game developers and business users to use large-scale data storage needs.
OSS for what store?
OSS forum for storage sites and software applications accessories, high-definition pictures, audio and video, backup files , as well as a variety of APP application, multi-terminal synchronization software, disk file download station network.
The use of OSS, what problem can not be solved using local solutions to developers to solve?
OSS allow any developer can take advantage of Ali cloud the size advantage, and no upfront investment, it will not affect performance. Developers can be freed to focus on innovation, business growth without having to worry about bringing performance bottlenecks and security issues. OSS is not only low cost, but the operation is very simple.
OSS how much data can be stored, capped it?
OSS does not limit the total storage capacity, single Bucket capacity is not limited. You can upload files less than 5GB only by OSS console . For files larger than 5GB necessary to use part uploading and HTTP functions, or by using graphical tools ossbrowser or the command-line tool ossutil uploaded directly .
What type of storage OSS provides?
OSS provides a standard, low-frequency access, archiving, three storage types, cover the full range of data storage scenarios from hot to cold. Where the standard type of storage to provide high reliability, high availability, high performance object storage service capable of supporting frequent data access; low-access storage type for long-term preservation of data less frequently accessed (the average monthly frequency of visits 1-2 times), storage unit price is lower than the standard type; the type of archive storage required for long-term storage (more than six months is recommended) archive data, the lowest priced of the three storage types. Refer to storage type introduced .
Ali cloud will use the data stored on the OSS I do?
On user traffic data, in addition to Ali cloud to perform your service requirements or legal requirements, without any unauthorized use and disclosure. Refer to the Terms of Service .
Whether Ali cloud will own the data stored on the OSS?
Yes. Internal Ali cloud developers are also many projects using OSS as the authorization data storage. These projects rely on OSS perform critical business operations.
How OSS reliability?
OSS provides developers with a safe, low-cost, highly reliable and highly scalable cloud storage infrastructure. Ali himself using the cloud infrastructure to run its global network of websites. OSS standard storage and low-access storage type of design can be achieved 99.995% availability, archival storage type of design can achieve 99.99% availability. All of these storage types are subject to Ali cloud object storage service level agreement OSS support.
If the flow from the application of a sudden surge, OSS how to ensure the availability of business?
OSS outset to handle high traffic from any Internet applications as a design goal of providing charging according to the amount of pricing and unlimited capacity, ensure that your service is not interrupted due to a surge in traffic. OSS can be distributed load balancing, any application will not be affected by traffic spikes.
OSS is how the data is organized?
OSS is a distributed object storage service, provided by Key-Value is a form of object storage service. When you save a file (Object), you need to specify this Object name (Key), you will follow to get the contents of the Object by this Key.

Key can also be used to simulate some of the properties of the folder. OSS folder concept is merely a logical concept, can be specified key value corresponding to the object in front of the directory including this function can be realized by setting folder API / SDK time manner. For example, to define the object's key abc/1.jpgwill create a bucket in the abcfolder and in a folder that is there will be a 1.jpgfile. On the console you can also create folders. OSS is actually a folder size is 0KB empty file. Therefore, the user creates a key value 1/of the object will be defined folders 1; and if the user creates a file abc/1.jpg, the system will not create abc/this file, delete therefore abc/1.jpgwill no longer exist abcin this folder.
How to get started with OSS?
Before using OSS Ali cloud service, make sure you have registered Ali cloud account and complete the real-name authentication. If you have not created Ali cloud account, the system will prompt you when you open OSS registered account . After you enter the OSS product details page , click immediately turn to. After the opening of OSS service, the default is billing according to the amount paid , if you want to further reduce the cost of OSS, we recommend that you purchase a discount package .

You can console, graphical management tools, command-line management tools and a variety of language SDK to quickly start using OSS, please refer to start using the cloud Ali OSS .

Ali Cloud area

What is Ali cloud area?
Ali cloud is a geographical location, wherein a plurality of aliyun available in physically separate regions and isolated regions by the available low latency, high throughput and the high redundancy of the network are connected together.
What is the available area (AZ)?
Available in the same area is the geographical area, power and mutually independent physical area network. Network latency available between the same instance a smaller area. Interworking between the same within the available ground area and the unused area, fault isolation can be done between available.
How to determine the data stored in the cloud area in which Ali?
When you select the region, we recommend that you consider location, the relationship between cloud offerings, resource prices and other factors. Please refer to the geographical area and available .

Billing

OSS is the cost?
The use of OSS, you can pay by actual usage, the first use, post-paid, there is no minimum fee. You can also pre-purchase package of resources, use of resources when, after deducting the appropriate amount. Under normal circumstances, the resource pack more favorable. For more pricing information, see Ali cloud pricing .
If you visit my other accounts OSS resources, how to pay?
When other account access to your OSS resources, we will charge the normal price of OSS. You can also choose to pay for storage space configured as a supplicant mode, in this mode, to pay the costs of OSS request and download data by the requesting party. Refer to the requester paid model .

safety

Data storage security on OSS do?
OSS itself is very safe. After the completion of creation, only the owner can access its resources OSS resources. OSS provides a user authentication to control access to the data. You can use a variety of access control policy, such as storage level and file-level access control list (ACL) , selectively grant permissions to users and user groups. OSS console displays the storage space you are publicly accessible. You will not want to file storage space and a publicly accessible set to private read and write. If you read the private ACL settings file or storage space for the public to read / write, OSS will warn you.
How to control access to the data stored in the OSS?
For stored in the Object Bucket of access, OSS provides a variety of access control, including ACL, RAM Policy and Policy Bucket .
- ACL : OSS for the authority to provide the access control list (ACL) control. ACL is based on the authorization policy resources may be granted Bucket and Object Access . You can set the ACL when you create or upload Bucket Object, can also modify the ACL created within any time after the Bucket or upload Object.
- Policy RAM : RAM (Resource Access Management) is a resource access control services provided by Ali cloud . RAM Policy is based on the user's authorization policy. By setting RAM Policy, you can centrally manage your users (such as employees, system or application), as well as control which users can access resources in your name. For example, you can restrict users have only read access to one of the Bucket. Sub Account is subordinate to the main account, and can not have any of these resources actually account all the resources belong to the main account.
- Policy Bucket : Bucket Policy is policy-based authorization resources . Compared to the RAM Policy, Bucket Policy is simple, graphical configuration support directly in the console, and Bucket owners can directly access authorization, without having to have a RAM operating authority. Bucket Policy Support grant access to other user accounts RAM, and grant access to specific IP with conditions to anonymous users.
Which provides data encryption way OSS?
OSS provides server-side encryption and client encryption.
- Server Side Encryption is to save data to disk before the data center is encrypted and decrypted automatically when you download a file. OSS provides two server-side encryption:
  - Use KMS hosting key encryption and decryption (SSE-KMS)
    When uploading files, you can use the designated CMK ID or default KMS hosted CMK encryption and decryption operations. This scenario is suitable for large amounts of data encryption and decryption. Data need not be sent to the KMS decryption server via a network, which is a low cost way of encryption and decryption.
    
    Will produce a small amount of KMS key API calls attention to the cost of using a KMS key function, please refer to the cost of KMS accounting standards .
  - Use OSS Fully Managed Encryption (SSE-OSS)
    OSS-based encryption fully managed, is a property Object. OSS server is encrypted using an encryption AES256 each object, and is encrypted using a different key for each object, as an additional protection, using the master key will periodic rotation of the encryption key itself is encrypted. This approach is suitable for bulk data encryption and decryption.
- Client Encryption: Encryption is the client to encrypt the data before sending the local user to the OSS, using the data encryption key, currently supports the following two ways:
  - Use KMS hosting user master key
    When using the master key KMS managed user client for data encryption, without providing any OSS encrypted encryption key to the client. KMS users only need to specify the master key ID when you upload objects (ie, CMK ID).
  - User self-management key
    Use the key user self-management, self-generated and user needs to keep the encryption key. When the user's local client encryption, an encryption key independent uploaded by the user (a symmetric encryption key or asymmetric encryption key) to encrypt the local client.

Storage Management

What is OSS lifecycle management? How to use life-cycle management to help reduce storage costs OSS?
By the rules of the life cycle, you can more efficiently manage your stored data, save a lot of manpower and storage costs. You can set a specific prefix matching rules on a regular basis to convert the non-popular low-frequency data access or archive storage, data will no longer need to access deleted. E.g:
- Medical records of a medical institution, after upload to the OSS need occasional access within six months, after six months of basic no longer accessible. You can set the rules of the life cycle, it will have 180 days to upload medical records into archival storage.
- A company service hotline audio file, upload it to within two months after the OSS, required as a basis for verification of data and statistics, and occasionally visit two months later, six months after basic no longer visit, two years after no longer need to store data. You can set the rules of the life cycle, set the audio file uploaded into low-access storage for 60 days, 180 days into archival storage, delete 730 days.
- You can also delete data Bucket bulk through the life cycle rule. For example: there is a lot of storage space within the file you want to delete all, but only manually delete each file can be deleted up to 1000, when you remove too much trouble. You can configure a matching rule the entire life cycle of Bucket, set the day after deleting all files. Data in this Bucket are deleted by the next day.
Details and configuration of the lifecycle, see Management Life Cycle .
What is OSS replication across the region?
Inter-regional replication (Bucket Cross-Region Replication) is Bucket OSS across different data centers (regional) is automatic, asynchronous replication Object , Object it will create, update and delete operations copied from the source to the target storage space to store the different regions space. This feature can provide a good cross-regional Bucket disaster recovery or data replication to meet the user's needs. Bucket in the target file is an exact copy of the source file in the Bucket, they have the same file names, metadata and content, such as creation time, owner, user-defined metadata, Object ACL, file content.
Cross-regional copy how to charge?
After opening cross-regional replication, master Bucket from the two regions will result in data traffic between the cross-regional when backing up files, OSS will be charged the cost of replication traffic across the region. Each sync 1 Object, OSS will cumulative number of requests and billing according to the amount. Currently only supports replication traffic across the region by the amount of charge, does not provide a resource package.

Ali cloud -OSS-Help- Description: Frequently Asked Questions

General FAQs

Ali Cloud area

Billing

safety

Storage Management

More questions

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