Backup storage on the local cluster

General requirements are listed in General requirements.

To better understand how to calculate the hardware configuration for backup storage with the local cluster destination, consider the following examples with RAM and CPU reservations.

Example 1. If you have 1 physical node (1 system+metadata disk and 5 storage disks) and want use the 3+2 encoding mode with the disk failure domain, refer to the table below for the calculations. Note that this configuration has redundancy only in case of a disk failure, the node failure will lead to data unavailability and potential data loss.

1 node for backup storage on the local cluster
Service	The only node
System	4.5 GB, 3.3 cores
Storage services	5 storage disks and 1 metadata on system disk (each takes 0.5 GB and 0.2 cores), that is 3 GB and 1.2 cores in total
Backup Gateway	1 GB, 0.5 cores
Service reservations	7.5 GB of RAM and 4.6 cores
Minimum hardware configuration	12 GB of RAM and 6 cores
Recommended hardware configuration	16 GB1 of RAM and 6 cores

Example 2. If you have 5 nodes (1 system disk, 1 metadata disk, and 10 storage disks) and want to use them for backup storage, refer to the table below for the calculations. Note that three nodes are used for the management node high availability, and each of them meets the requirements for the management node.

5 nodes for backup storage on the local cluster
Service	Management nodes (nodes 1-3)	Secondary nodes (nodes 4-5)
System	4.5 GB, 3.3 cores	1.5 GB, 1.1 cores
Storage services	10 storage disks and 1 metadata disk (each takes 0.5 GB and 0.2 cores), that is 5.5 GB and 2.2 cores in total	10 storage disks and 1 metadata disk (each takes 0.5 GB and 0.2 cores), that is 5.5 GB and 2.2 cores in total
Backup Gateway	1 GB, 0.5 cores	1 GB, 0.5 cores
Service reservations	11 GB of RAM and 6 cores	8 GB of RAM and 3.8 cores
Minimum hardware configuration	12 GB of RAM and 6 cores	8 GB of RAM and 4 cores
Recommended hardware configuration	242 GB of RAM and 8 cores	16 GB3 of RAM and 6 cores