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[Share]Get to know Alibaba Cloud in 2mins—15 frequently asked questions

More Posted time:Dec 15, 2015 17:49 PM
Get to know Alibaba Cloud in 2mins—15 frequently asked questions

1.    How Do I Choose an ECS Configuration?
We advise that you select a suitable ECS configuration based on your actual business needs. If your business grows, you can upgrade your configuration online or add ECS and perform load balancing.
Please determine the following business needs: 1. Website type; 2. Average site PVs per day; 3. Homepage size; 4. Data capacity.

2. Can ECS be Upgraded Seamlessly? How Are Fees Calculated?
ECS (yearly/monthly subscription) supports custom online upgrades. The upgrade process is seamless, so you do not have to redeploy the environment or migrate data. The IP address will also remain the same. This operation is very simple and can be accomplished through the console. In addition, you only have to pay the difference in price for the actual duration of the upgrade.
a) ECS supports online instance type upgrades (after the upgrade, the changes will take effect when the server is restarted) and online bandwidth upgrades (seamless upgrades that do not require the server to be shutdown or restarted; you can perform upgrades on a daily basis). Currently, you cannot downgrade after upgrading, but this may be done when you renew your subscription.
b) ECS allows you to add data disks.

3. What lines are used by ECS?
Alibaba Cloud ECS use multiline BGP access.

4. Are the IP addresses independent? Can you specify or add IPs?
The Alibaba Cloud server will automatically allocate one independent Internet IP address (when the public bandwidth > 0Mbps) and one independent intranet IP address. The intranet IP address is generally used for communication between servers or between a server and OSS, RDS, or another cloud product. Normally, the IP address will not change. Currently, IP addresses cannot be specified, selected, or added/purchased.

5. Compared to Traditional IDC, What Are the Comparative Advantages of ECS?
a) Machine room network: green machine rooms, DC servers, low PUE; multiline BGP networks, dedicated bandwidth.
b) Ease of operation: built-in mainstream operating system (including genuine activated Windows versions), ability to switch operating systems online; the Web console can be used for online management; automated O&M can be performed through APIs.
c) Disaster recovery and backup: 99.95% service availability, 99.999% data reliability; multiple copies of each data segment are saved so that, if an individual segment is damaged, the data can be quickly restored; user-defined snapshots support data rollback and recovery; automatic downtime migration, fast and automatic fault recovery; system performance alarms.
d) Security and reliability: effective prevention of MAC spoofing and ARP attacks; effective defense against DDoS attacks, allowing for flow cleaning and using black holes; ability to provide port intrusion scans, trojan scans, vulnerability scans, password cracking defenses, and other additional services; protective security group rules; multi-user isolation.
e) Flexible scaling: user-defined images can be used to quickly create ECS, 100 ECS can be started or released within 10 minutes; configurations can be upgraded online; bandwidth can be increased/decreased freely; online load balancing allows for quick and easy application scaling;
f) Cost reduction: lower cost of use threshold; no large one-time investment required; pay-as-you-go and flexible payment options allow users to flexibly respond to business changes

6. What are the differences between ECS and light ECS? How should I choose between them?
a) Light ECS has the dedicated resource advantages of ECS, while also providing simple and convenient management methods like those of
virtual hosts.

b) ECS has super administrator privileges and light ECS does not support remote desktop login and other management permissions.
c) Light ECS can only support 1 site.

7. How many websites can be placed on a single ECS?
A single ECS can be registered for 5 different websites. The number of domain names is unlimited. Because only 5 registered service numbers are assigned to a single server, if you have submitted Website registration applications for all 5 registered service numbers bound to your ECS IP and need to register more Websites, we suggest you buy another ECS.

8. Can ECS defend against attacks?
Alibaba Cloud provides the Anti-DDOS service. Combined with the powerful data analysis capabilities of the Alibaba Cloud computing platform, this offers one-stop security services to medium and small Websites, such as detection of security vulnerabilities and Webpage trojans, as well as host intrusion detection and DDoS protection for ECS users. The servers can defend against DDoS attack traffic up to 5 Gbps. When an attack occurs, our monitoring
system can automatically detect it and clean the abnormal traffic for you. If the attack traffic is very large, black hole processing will be processed for
you to protect the security of your servers.

9. How Do I Select an Operating System?
Windows: An activated genuine version of Windows is included. It is suitable for running Windows programs, such as .net. It supports SQL Server and other databases (must be independently installed). It can be managed through remote desktop login.
Linux: the most popular server OS. You can remotely access your ECS through the SSH method. Linux is generally used for high-performance Web server and other server applications. It supports common programming languages, such as PHP and Python, as well as MySQL and other databases (must be independently installed).
a) Alibaba Cloud Linux (compatible with RedHat): Please install the software online through YUM. For the YUM source, you must purchase
commercial support for RedHat.

b) CentOS: Please install software online through YUM.
c) Ubuntu: Please install the software online with aptitude.
d) Debian: Please install the software online with apt-get.

10. Does ECS Automatic Backup Occupy Server Space?
ECS supports automatic backup. Multiple copies of each data segment are saved so that, if an individual segment is damaged, the data can be quickly restored. The automatic backup is independent of the server and will not take up server space.

11. Can OS be Switched or Automatically Added/Upgraded? Will the IP Address Change When You Switch OS? Will the Data on Data Disks be Reset?
a) ECS (yearly/monthly subscription) allows you to switch between OS at no cost. However, the automatic addition or upgrading of OS is not supported, but the OS can be patched.
b) Switching between OS will not change your IP address.
c) When switching OS, the data saved on the system disk will be lost. We suggest you backup any personal data on the system disk to a data disk or through another method. The data on data disks will not be affected.

12. Can load balancing be performed for ECS?
Load balancing can be performed on ECS. Users receive a free Server Load Balancer subscription for a single cloud account with 2 ECS.  However, you must ensure the Web server configurations and Website codes are consistent.  The Server Load Balancer service connects multiple ECS to form an application service cluster. In this structure, the application system's service
capabilities can be horizontally scaled.

13. How many user-defined images with different data can be created under one AliCloud account?
You can use user-defined images to quickly create servers. A maximum of 10 user-defined images can be created under a single Alibaba Cloud account. Even when the ECS used for creating a user-defined image expires or the data are released (i.e. the system disk used for the snapshot expires or is released), the created user-defined image will not be affected.

14. Can Databases be Built on ECS?
Yes, you can build databases directly on an ECS. We recommend using high-performance ApsaraDB for RDS for back-end databases. ApsaraDB for RDS uses an out-of-the-box approach and is compatible with MySQL and SQL Server relational databases. In addition, it provides online database resizing, backup and rollback, performance monitoring, and analysis functions. Using RDS with ECS doubles I/O performance and allows for communication via intranet, thus
avoiding network bottlenecks.

15. Does Alibaba Cloud Provide a Free Migration Service for Environment Configurations and Data?
The migration service requires that the source server OS is the same as the OS on the ECS purchased from Alibaba Cloud. For example, migration is possible from Windows to Windows or Linux to Linux, but not from Windows to Linux or Linux to Windows.  
Scope of free migration service:
1. The original data (database data, attachments, and program files) are migrated to an ECS purchased from Alibaba Cloud or ApsaraDB for RDS. 2. Licensed software installation and environment configuration synchronization
3. Troubleshooting (excluding debugging of your software)
Scope of free installation:
Licensed software installation and environment configuration synchronization.
[Cloudy edited the post at Apr 19, 2016 15:58 PM]

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1st Reply#
Posted time:Nov 13, 2019 12:48 PM
afzaalvirgoboy:Hi, Megan,

Your ECS plan is not a recommended plan for the production environment. 2GB RAM is recommended for develop...

Assistant Engineer
Assistant Engineer
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2nd Reply#
Posted time:Nov 13, 2019 11:06 AM
Hi, Megan,

Your ECS plan is not a recommended plan for the production environment. 2GB RAM is recommended for development/testing purposes only.

> My CPU is about 10% and my RAM is about 80%

This means that your services are functioning fine. 75-80% of RAM usage is normal if your services are being consumed.

> Will I upgrade my RAM?

Yes, it would be good if you can increase the RAM, and I also recommend that you upgrade the overall ECS instance. A good production machine should have 2 vCPU and 8 GB of RAM. This depends on the OS that you use too, for a Linux machine 4 GB of RAM is enough, but for Windows OS you should consider using 8 GB RAM.

> and how to upgrade?

If you purchased a subscription, then you might need to purchase a new subscription with updated vCPU and RAM resources. You will not be able to remove this resource since you have already paid for this one. You can also take backups of this machine and use the disks of this machine in the new ECS.

If you are using a Pay-as-you-go model, you can edit the profile of your machine while it is turned off. See this link for more on this,

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3rd Reply#
Posted time:Nov 13, 2019 10:04 AM
My ecs is 1vcpu 2GiB,,40G,55D,now My CPU is about 10% and my RAM is about 80%,Will I upgrade my RAM? and how to upgrade?

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Posted time:Oct 4, 2019 12:26 PM
one of those for each product would be wonderful.

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Posted time:Sep 13, 2019 15:41 PM
Great short and quick Insights!

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Posted time:Dec 17, 2018 16:37 PM
Thanks for the post.

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Posted time:Nov 22, 2018 23:06 PM
I am not sure , if it helps . But under "Billing Managment", we can set 'Billing Alerts' threshold. But that redirects to an email. I think if that can be redirected to a registered mobile too, it can be more convenient. Then we can contact customer care, in case any discrepancy. My opinion.
Street children suffer not because of their fault. We can help them if we want.Contact me.

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Posted time:Sep 27, 2018 12:41 PM
Hello, I want to ask about billing method. When I create an instance my "payment status" showed "paid". My confusion is that if there is any way that i pay my bill after one months usage (like in amazon services i got a bill receipt of whole month usage after that i have to pay them) but here when i created an instance i was debited after an hour usage.i chose "pay as you go method". i asked this in support center but there is no response from them.
Any help would be appreciated.

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Posted time:Jun 28, 2018 14:47 PM
dannypham:how to register free trial, i cant update payment because update button has been disable!
please tell me how! thank you
Step1- Register for the Alibaba Cloud Account
Step2- Add the Payment Method (Credit/Debit or Paypal)
Step3- In this page you can choose the product available for the trail.

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Posted time:Mar 1, 2018 18:12 PM
I got the same error as well. did you guys figure out what is happening?

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Posted time:Oct 20, 2017 15:10 PM
me 3. It really sucks. not usable at all.

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Posted time:Oct 19, 2017 15:24 PM
Me To
"your account has encountered an exception. Please submit a ticket to take care of this"

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Posted time:Oct 19, 2017 1:23 AM
SVETA:What does that error mean? how to fix it? tell me pls
Sorry, your account has encountered an exception. Please submit a ...
Me too..
Cannot creat distance

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Posted time:May 19, 2017 11:20 AM
What does that error mean? how to fix it? tell me pls
Sorry, your account has encountered an exception. Please submit a ticket to take care of this