# Using Percona 5.6 and 5.7 nodes in the same cluster **URL:** \ **Category:** Percona XtraDB Cluster 5.x\ **Created:** [September 26, 2017, 3:42am UTC](https://forums.percona.com/t/using-percona-5-6-and-5-7-nodes-in-the-same-cluster/5881 "2017-09-26T03:42:50Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![duncan9562](https://avatars.discourse-cdn.com/v4/letter/d/e56c9b/32.png) [@duncan9562](https://forums.percona.com/u/duncan9562)\ **Post date:** [September 26, 2017, 3:42am UTC](https://forums.percona.com/t/using-percona-5-6-and-5-7-nodes-in-the-same-cluster/5881/1 "2017-09-26T03:42:50Z")
Hi guys, I have a 3 node cluster in the following setup:- 2 x nodes running percona-xtradb-cluster-server-5.6 5.6.30-25.16-1.wheezy 1 x node percona-xtradb-cluster-garbd-3.x (arbitrator voting member). I am looking to migrate the cluster onto Debian Jessie, but also upgrade to Percona 5.7. As this is a live cluster, I am very reluctant to upgrade the existing cluster nodes (and ultimately want to avoid as much downtime as possible). My question is, can I join a node running Percona 5.7 into the existing cluster running Percona 5.6? I.e, build 2 new nodes running Percona 5.7, add them into the cluster, let them sync, then remove the nodes running 5.6… Any help will be greatly appreciated. Kind regards, Duncan. ---
**Author:** ![krunalbauskar](https://avatars.discourse-cdn.com/v4/letter/k/439d5e/32.png) [@krunalbauskar](https://forums.percona.com/u/krunalbauskar)\ **Post date:** [October 4, 2017, 5:38am UTC](https://forums.percona.com/t/using-percona-5-6-and-5-7-nodes-in-the-same-cluster/5881/2 "2017-10-04T05:38:27Z")
Mix-match of PXC-5.6 and PXC-5.7 is possible but there are some limitations - PXC-5.7 _can accept_ SST from PXC-5.6 (backward compatible but read the upgrade process here [url][Redirecting](https://www.percona.com/doc/percona-xtradb-cluster/LATEST/howtos/upgrade_guide.html%5B/url%5D)) - Mix-match should be is temporary and not recommended for long-term use. - PXC-5.7 node should not act as DONOR to PXC-5.6 node. (If mix-match is during transition only then this is rare possibility). We recommend running all nodes with same version of PXC (including minor version). Upgrade is short window and is supported.