Tagging feature for SAP HANA backup - Cloud Backup - Alibaba Cloud Documentation Center

Tags help you mark and categorize resources. You can group Cloud Backup resources that serve the same purpose. This simplifies searching and resource aggregation. This topic describes how to use tags for SAP HANA backup.

Preparations

Ensure that you have completed the preparations for SAP HANA backup. For more information, see Preparations.
Ensure that the SAP HANA instance is registered and its nodes are verified. For more information, see Register an SAP HANA instance and Verify SAP HANA nodes.

Background information

You can set different tags for different SAP HANA instances. For example, in team or project management, you can set tags based on dimensions such as project or department. An example is project:a. This lets you group instances. During daily maintenance, you can filter for a group of instances with specific tags before you perform operations.

Usage notes

Each tag consists of a key-value pair.
A tag must be unique.
For example, the company:a tag is added to a backup vault. If you add the company:b tag to the backup vault, the company:a tag is replaced with the company:b tag.
Tags are not shared across regions. For example, tags that are created in the China (Hangzhou) region are invisible to the China (Shanghai) region.

Limits

When you create tags, take note of the following limits:

Item	Limit
The maximum length of a key	128 characters
The maximum length of a value	128 characters
The maximum number of custom tags that you can add to a resource	20
The key of a tag	The key cannot start with `aliyun` or `acs:`. The key cannot contain `http://` or `https://` . The key cannot be an empty string.
The value of a tag	A tag value cannot contain `http://` or `https://`.

Set tags

Log on to the Cloud Backup console.
In the left navigation pane, choose Backup > SAP HANA Backup.
In the top navigation bar, select a region.
On the SAP HANA Instances tab, click the tag icon in the Tags column of the target instance.
In the dialog box that appears, click Edit.
In the Key and Value fields, enter the key-value pair of a tag and click Save.
If you want to create more than one tag, click Add a Row to specify the key-value pair of a new tag.

Search for resources by tag

On the SAP HANA Instances tab, select Tags from the filter drop-down list, enter the tag information, and then click Search Icon.

You can search for a resource by using a key, as shown in the following example:
```
aaa
```
You can search for a resource by using a key-value pair, as shown in the following example:
```
aaa:bbb
```
You can search for a resource by using multiple key-value pairs, as shown in the following example:
```
aaa:bbb,ccc:ddd
```