# Backup SLAs Backup SLAs allow you to group backup policies and schedules for multiple VMs. In general, a VM can have at most only one backup policy to always have an easy-to-interpret configuration. Each policy can have multiple schedules assigned so that you can define more complex schedules in which backups are executed even multiple times each day and with a different backup type. {% hint style="info" %} **Note:** * schedules define the type of backup - full or incremental * the approach we highly recommend is to create a schedule for **periodic full** backup and always assign at least 1 such schedule in backup SLAs * in order to create incremental backups, you always need to have **at least 1 incremental backup schedule** and run at least one full backup * in most virtualization platforms supported byStorware Backup & Recovery, it is required to **keep the last snapshot** for future incremental backups * there is **no limit** to the number of policies you can create * there is **no limit** to the number of virtual machines a user can add to the policy * the limit of the number of virtual machines that can be added to Storware Backup and Recovery is 10000. This is the overall maximum value of protected objects that the server can scale to {% endhint %} --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.storware.eu/70/administration/virtual-environments/backup-slas.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.