# Percona XtraBackup Cluster to Cluster nodes quantity

**URL:** <https://forums.percona.com/t/percona-xtrabackup-cluster-to-cluster-nodes-quantity/10528>\
**Category:** Percona XtraBackup\
**Created:** [May 20, 2021, 6:43am UTC](https://forums.percona.com/t/percona-xtrabackup-cluster-to-cluster-nodes-quantity/10528 "2021-05-20T06:43:15Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Russel\_HSU](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/russel_hsu/32/3499_2.png) [@Russel\_HSU](https://forums.percona.com/u/Russel_HSU)\
**Post date:** [May 20, 2021, 6:43am UTC](https://forums.percona.com/t/percona-xtrabackup-cluster-to-cluster-nodes-quantity/10528/1 "2021-05-20T06:43:15Z")

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Hello  
When I use Percona XtraBackup to backup and restore  
Old cluster to New cluster  
If old cluster have 3 nodes  
The new cluster also need 3 nodes?

I mean the nodes quantity need to be the same??

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**Author:** ![Marcelo\_Altmann](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/marcelo_altmann/32/11299_2.png) [@Marcelo\_Altmann](https://forums.percona.com/u/Marcelo_Altmann)\
**Post date:** [May 20, 2021, 10:46am UTC](https://forums.percona.com/t/percona-xtrabackup-cluster-to-cluster-nodes-quantity/10528/2 "2021-05-20T10:46:24Z")

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Hi @Russel_HSU ,

The backup itself you need to restone into a single node only. Then bootstrap that node and start the others. SST will take care of the rest.

In terms of the number of nodes, the recommended number is always an odd number starting by 3. This is to make sure you will have enough quorum in case of a network partition/split.

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**Author:** ![matthewb](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/matthewb/32/34_2.png) [@matthewb](https://forums.percona.com/u/matthewb)\
**Post date:** [May 20, 2021, 1:09pm UTC](https://forums.percona.com/t/percona-xtrabackup-cluster-to-cluster-nodes-quantity/10528/3 "2021-05-20T13:09:35Z")

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Hi @Russel_HSU,  
There is no requirement that your new cluster be of same size as the old one. However, as Marcelo said, we recommend 3 at minimum. I would not go above 7.

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**Author:** ![Michael\_Coburn](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/michael_coburn/32/18_2.png) [@Michael\_Coburn](https://forums.percona.com/u/Michael_Coburn)\
**Post date:** [May 20, 2021, 2:15pm UTC](https://forums.percona.com/t/percona-xtrabackup-cluster-to-cluster-nodes-quantity/10528/4 "2021-05-20T14:15:06Z")

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