You can use Cloud Backup to back up files from ECS instances and restore them as needed. Before you back up data, complete the following preparations.
Notes
For optimal backup speed, run the Cloud Backup client on a machine that has a 64-bit dual-core or better CPU and more than 8 GB of available memory.
The amount of data that can be backed up depends on the available memory. With 4 GB of available system memory, you can back up a maximum of 1 million files or a total of 8 TB of data. If a folder contains tens of millions of files or more, use a machine with 16 GB of available memory.
Step 1: Grant authorization to a role
When you use Cloud Backup to back up ECS files, grant authorization to the AliyunServiceRoleForHbrEcsBackup service-linked role. Perform the following steps:
Log on to the Cloud Backup console.
In the navigation pane on the left, choose .
An authorization dialog box appears. Grant authorization to the role as prompted.
In the Cloud Backup Service Authorization dialog box, click Confirm Authorization.
For more information, see Service-linked role for Cloud Backup.
Step 2: Configure Cloud Assistant
The Cloud Backup client for ECS requires Alibaba Cloud Cloud Assistant.
If the ECS instance to be backed up was purchased before December 1, 2017, install the Cloud Assistant client. For more information, see Install the Cloud Assistant client.
If the ECS instance to be backed up was purchased on or after December 1, 2017, the Cloud Assistant client is pre-installed by default.