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What Can I Do If the Buffer and Cache Occupy Too Much Memory of a Linux ECS? Symptom When querying the system memory usage using free after the Linux ECS runs for a long period, you have found that most of the memory is used by buffers and cache. Possible Cause In Linux memory management
Why Does It Takes a Long Time to Connect to an ECS Using SSH After UseDNS Is Enabled? Symptom It takes a long time to connect to an ECS using SSH. Possible Causes After the UseDNS option is enabled for the sshd service on the SSH server, when a client attempts to connect to the server
What Can I Do If the Permissions on the Root Directory of My CentOS ECS Changed to 777? Symptom You executed the chmod -R 777 / command on your ECS running CentOS, and the permissions on the root directory were changed to 777. As a result, most services were unavailable and most commands
Can AS Add Yearly/Monthly ECS Instances When It Scales Out an AS Group? Only pay-per-use or spot ECS instances can be added during scale-out events. Parent topic: General
How Do I Change the Login Mode of a Linux ECS from Key Pair to Password? Scenarios This section describes how to change the login mode of a Linux ECS from key pair to password. Procedure Use the key to log in to the Linux ECS and set the password of user root. sudo passwd root If
How Do I Troubleshoot Blue Screen or Black Screen Errors After an ECS Is Started? Symptom When you are remotely logging in to an ECS, a screen that's black or blue is displayed. Root Cause The blue screen or black screen errors are caused by explorer.exe errors in Windows. explorer.exe
Why Does BSOD Occur When I Log In to an ECS Using Remote Desktop Connection? Symptom When you attempt to use a remote desktop connection to log in to an ECS running Windows Server 2012 R2 from a local computer with redirected drive enabled, blue screen of death (BSOD) occurs. Root
What Can I Do If My Windows ECS Can Ping a Website but Cannot Access it? Symptom Your Windows ECS cannot access websites or applications after running for a long time. You can remotely log in to the ECS and ping websites using the ECS, but it failed to access websites or applications
Why Does My Unsubscription from ECS Fail After I Unsubscribe from MRS? Check that the ECS ID is not used by an MRS cluster in use. On the ECS console, find the ECS to be unsubscribed from and click Locked by MRS to unlock it. Click Unsubscribe again. If the unsubscription still fails
Why Does My Unsubscription from ECS Fail After I Unsubscribe from MRS? Question: Why Does My Unsubscription from ECS Fail After I Unsubscribe from MRS? Answer: Check that the ECS ID is not used by an MRS cluster in use. On the ECS console, find the ECS to be unsubscribed from and
Do I Need to Bind an EIP to Each ECS in the VPCs Connected over a Cloud Connection? If the ECSs are used only within the VPCs, no EIPs are required. If you want to access the ECSs from the Internet or use the ECSs to provide services accessible from the Internet, you need to purchase
Can the SMS API Be Called by an Internal Network (For Example, an ECS Server)? No. The SMS API cannot be called by an internal network. If you are using a HUAWEI CLOUD ECS, apply for an EIP to access the SMS service through the public network. Parent topic: Secondary Development
Can I Specify the System Disk Capacity When I Create an ECS Using an Image? When you use a system disk image to create an ECS, you can set the ECS specifications and system disk type without considering those in the image, but the system disk capacity can only be larger than that
What Do I Do If the Disks of a CentOS ECS Created from an Image Cannot Be Found? Symptom When you started a CentOS ECS, the system cannot find disks. Generally, this is because the xen-blkfront.ko module was not loaded during the startup. You need to modify OS kernel startup parameters
How Can I Back Up the Current Status of an ECS for Restoration in the Case of a System Fault? You can back up the ECS in any of the following ways: (Recommended) Use CBR to create a scheduled backup for the ECS. If the ECS fails, select a backup you want to use to restore the ECS,
What Should I Do If a Shell Script Debugged on an ECS Fails to Be Executed in DataArts Factory? Symptom A shell script that has been debugged on an ECS fails to be executed in DataArts Factory. The script is used to connect to GaussDB(DWS) through gsql to query the number of data
[Notice] Huawei Cloud DDS 3.4 Will Reach EOS on July 30, 2025 Notice Content On July 30, 2025, 00:00:00 GMT+08:00, Huawei Cloud will stop providing services for DDS 3.4. Scope All regions Impacts After the end of service (EOS), Huawei Cloud will no longer provide technical support
Migrating Data from a Self-Managed SQL Server Database on an ECS to an RDS for SQL Server DB Instance Scenarios You have created a Microsoft SQL Server database on an ECS. The self-managed SQL Server database version on the ECS cannot be later than the version of the RDS for SQL Server
How Can I Obtain the Mapping Between Disk Partitions and Disk Devices on a Windows ECS? This section uses an ECS running Windows Server 2019 64-bit as an example to describe how to obtain the mapping between disk partitions and disk devices. For KVM or QingTian instances, see How
How Can I Obtain the Mapping Between Disk Partitions and Disk Devices on a Linux ECS? For a Xen ECS running Linux, its disk partitions correspond to disk devices. This section uses a Linux ECS running Red Hat Enterprise Linux 7 as an example to describe how to obtain the mapping between
